小笠原　俊夫OGASAWARA Toshioオガサワラ　トシオ

業績情報

氏名・連絡先

• 氏名

  オガサワラ　トシオ, 小笠原　俊夫, OGASAWARA Toshio

• 生年

  1962

• 個人ホームページ

  http://web.tuat.ac.jp/~ogasat

主たる所属・職名

• 工学研究院　先端機械システム部門, 教授

その他の所属

• 工学部　機械システム工学科
• 工学府　機械システム工学専攻
• グローバルイノベーション研究院

経歴

• 独立行政法人宇宙航空研究開発機構
  主幹研究員
  自 2003年10月01日, 至 2015年08月31日
• 独立行政法人航空宇宙技術研究所
  主任研究員
  自 2001年04月01日, 至 2003年09月30日
• 科学技術庁航空宇宙技術研究所
  主任研究官
  自 1998年04月01日, 至 2001年03月31日
• 日産自動車株式会社
  総合研究所/宇宙航空事業部
  研究員
  自 1987年04月01日, 至 1998年03月31日

学歴

• 東京工業大学
  大学院理工学研究科
  至 1987年03月31日, 修了, 修士
• 東京工業大学
  工学部
  至 1985年03月, 卒業

教育・研究活動状況

• 航空宇宙システム、エネルギーシステム、自動車などへの適用が急速に拡大している炭素繊維複合材料、セラミックス複合材料、複合材構造物などを対象とした基礎研究・応用研究を進めています。JAXAの研究開発プロジェクトにも参加しています。

研究分野

• A689　ものづくり技術（機械・電気電子・化学工学）, A18010　材料力学、機械材料
• A489　ナノテク・材料, A26030　複合材料、界面
• A889　フロンティア（航空・船舶）, A24010　航空宇宙工学

研究キーワード

• 炭素繊維強化プラスチック複合材料、カーボンナノチューブ複合材料、セラミック複合材料、炭素繊維･炭素複合材料、複合材構造、構造用セラミックス

研究テーマ

• 炭素繊維強化プラスチック複合材料（CFRP）の損傷・破壊に関する実験的評価と数値シミュレーションに関する研究
  自 199804
• 長繊維強化セラミック複合材料の損傷・破壊に関する実験的評価と数値シミュレーションの研究
  自 199804
• 配向カーボンナノチューブ複合材料の研究
  自 200104
• 多機能なFBG型光ファイバセンサの研究
  自 201604
• CFRPおよびCFRP/金属の接着構造に関する研究
  自 201704

共同・受託研究希望テーマ

• 繊維強化複合材料（CFRP、CMC等）の力学的・熱的評価と数値シミュレーション
  炭素繊維強化プラスチック（CFRP）、長繊維強化セラミック基複合材料、炭素繊維/炭素複合材料、カーボンナノチューブ複合材料、アブレータ、構造用セラミックスなどを対象とした力学特性・熱特性の実験的評価、試験法、数値解析、実用化開発などを手がけてきました。気軽にご相談頂ければと思います。
  産学連携等、民間を含む他機関等との共同研究を希望

科学研究費助成事業

• 基盤研究（B）
  CFRPの電気的異方性と雷アークの相互作用の定量化による雷撃損傷メカニズムの解明
  自 2024年, 至 2024年
• 基盤研究（C）
  CFRP表面状態による着雷現象を反映した熱・電気連成解析に基づく被雷損傷モデル
  自 2023年, 至 2023年
• 基盤研究（B）
  CFRPの電気的異方性と雷アークの相互作用の定量化による雷撃損傷メカニズムの解明
  自 2023年, 至 2023年
• 基盤研究(B)
  極低温におけるCFRPの微視的破壊現象の学理解明と損傷進展解析への応用
  自 2022年, 至 2024年
• 基盤研究(C)
  CFRP表面状態による着雷現象を反映した熱・電気連成解析に基づく被雷損傷モデル
  自 2022年, 至 2022年
• 基盤研究(B)
  CFRPの電気的異方性と雷アークの相互作用の定量化による雷撃損傷メカニズムの解明
  自 2022年, 至 2022年
• 基盤研究(C)
  真空紫外光照射がポリイミドの接着強さに及ぼす表面改質効果の物理化学的要件の解明
  自 2021年, 至 2021年
• 基盤研究(C)
  多機能光ファイバセンサの信号解析による新規ひずみ・樹脂硬化度分離評価技術の構築
  自 2021年, 至 2021年
• 基盤研究(C)
  CFRP表面状態による着雷現象を反映した熱・電気連成解析に基づく被雷損傷モデル
  自 2021年, 至 2021年
• 基盤研究(B)
  チタンシリサイドをマトリクスとするSiC繊維強化複合材料の創出
  自 2020年, 至 2020年
• 基盤研究(C)
  多機能光ファイバセンサの信号解析による新規ひずみ・樹脂硬化度分離評価技術の構築
  自 2020年, 至 2020年
• 基盤研究(C)
  真空紫外光照射がポリイミドの接着強さに及ぼす表面改質効果の物理化学的要件の解明
  自 2020年, 至 2020年
• 基盤研究(B)
  航空機用CFRPの雷撃損傷メカニズムの解明とマルチフィジックス数値解析
  自 2019年, 至 2021年
• 基盤研究(B)
  チタンシリサイドをマトリクスとするSiC繊維強化複合材料の創出
  自 2019年, 至 2019年
• 基盤研究(C)
  多機能光ファイバセンサの信号解析による新規ひずみ・樹脂硬化度分離評価技術の構築
  自 2019年, 至 2019年
• 基盤研究(C)
  真空紫外光照射がポリイミドの接着強さに及ぼす表面改質効果の物理化学的要件の解明
  自 2019年, 至 2019年
• 基盤研究(B)
  チタンシリサイドをマトリクスとするSiC繊維強化複合材料の創出
  自 2018年, 至 2018年
• 基盤研究(B)
  チタンシリサイドをマトリクスとするSiC繊維強化複合材料の創出
  自 2017年, 至 2017年
• 基盤研究(C)
  モールド成形が可能な高耐熱・高強度CNT/ポリイミド複合材料の研究?
  自 2017年, 至 2017年
• 基盤研究(A)
  導電性を制御可能な航空機構造用CFRPの創出と電撃損傷挙動に関する研究
  自 2016年, 至 2018年
• 基盤研究（C）
  モールド成形が可能な高耐熱・高強度CNT/ポリイミド複合材料の研究
  自 2016年, 至 2016年
• 基盤研究（C）
  モールド成形が可能な高耐熱・高強度CNT/ポリイミド複合材料の研究
  自 2015年, 至 2015年

論文

• Detection of matrix cracks in composite laminates using embedded fiber-optic distributed strain sensing
  Ikeda, Yukino; Takeda, Shin-ichi; Hisada, Shinsaku; Ogasawara, Toshio
  SENSORS AND ACTUATORS A-PHYSICAL
  ELSEVIER SCIENCE SA
  We used an optical frequency-domain reflectometry fiber Bragg grating (FBG) distributed strain measurement system to detect matrix cracks in carbon fiber-reinforced plastics. Load/unload tests were performed on cross-ply laminates under ambient-, high-, and low-temperature conditions using embedded 100 mm gauge FBG sensors. We measured the strain distributed along the gauge and examined the crack initiation using optical microscopy and soft X-ray inspection. A peak appeared in the distributed strain corresponding to the occurrence of cracks. The strain distribution during crack initiation was calculated in each temperature range via finite element analysis and compared with the measurement results. We determined that the number and location of cracks can be determined by extracting the peaks from the distributed strain. However, the peaks in the distributed strain do not correspond to the occurrence of cracks that are close to each other, warranting a measurement method with a higher strain resolution.
  2024年12月16日, 研究論文（学術雑誌）, 共同, 380, 0924-4247, DOI(公開)(r-map)
• Mechanical properties of SiC fiber/carbon/Si-Co matrix composites processed using film boiling and melt infiltration
  Miura, Takashi; Ogasawara, Toshio; Aoki, Takuya; Kubota, Yuki; Abe, Keisuke; Kawakami, Kosuke
  JOURNAL OF THE AMERICAN CERAMIC SOCIETY
  WILEY
  This study objective is a proposal of a new lightweight and affordable structural material with heat resistance of 600-1000 degrees C. We developed process technology and evaluated the mechanical properties of SiC fiber (Hi-Nicalon)/Si-CoSi2 matrix composites. After Hi-Nicalon fibers were woven into orthogonal three-dimensional fabrics (Vf${{V}_f}$ 40%), a carbon layer (FB-C) was formed on the fiber surface using film boiling, serving as the fiber-matrix interface layer. To suppress Hi-Nicalon strength degradation, Si-22 at.% Co alloy with a lower melting point compared to pure Si was infiltrated at 1380 degrees C to produce Hi-Nicalon/FB-C/Si-CoSi2 matrix composites. Dense composites with no open pores were obtained. Their bulk density was 2.7 g/cm3. Their mean value of four-point bending strength was 460 MPa at room temperature and 612 MPa at 800 degrees C in an Argon atmosphere. Fiber pullout and fiber bridging were observed clearly on the fracture surfaces. The FB-C, with an average thickness of 4 mu m, suppresses Hi-Nicalon damage from the molten Si-Co alloy. Furthermore, an inexpensive oxidation-resistant coating of Si-Co alloy dispersed with TiB2 and SiC particles was formed on the composite surface. The four-point bending strength in air was 424 MPa at 800 degrees C and 539 MPa at 1200 degrees C, demonstrating that the oxidation-resistant coating functions effectively.
  2024年11月28日, 研究論文（学術雑誌）, 共同, 0002-7820, DOI(公開)(r-map)
• Microscopic damage behavior in CFRP cross-ply laminates at cryogenic temperature
  Fujishiro, Kazuyoshi; Ogasawara, Toshio; Mizutani, Koki; Kumazawa, Hisashi; Aoki, Takahira
  COMPOSITES SCIENCE AND TECHNOLOGY
  ELSEVIER SCI LTD
  For the practical use of cryogenic propellant tanks made of CFRP laminates, experimental elucidation of the laminates' microstructural damage propagation behavior at cryogenic temperatures is important. This paper presents a newly developed tensile test rig that enables in-situ observation of microscopic damage using an optical microscope at cryogenic temperatures using a Gifford-McMahon refrigerator. In-situ observations of microscopic damage under uniaxial tensile loading were done at room temperature (290 K, 17 degrees C) and at 30 K (-243 degrees C) on cross-ply thin-ply CFRP specimens of three kinds with different 90 degrees layer thicknesses. The results demonstrated that the crack propagation behavior is independent of temperature, that the matrix crack density is higher, and that the onset of matrix crack initiation strain is lower at 30 K than at 290 K. Furthermore, the thermal strain within 90 degrees layer at 30 K and at 290 K was estimated using finite element analyses (FEA). The FEA results suggest that the decrease in onset strain of matrix crack initiation at 30 K is mainly attributed to the increase in the thermal strains within the 90 degrees layer.
  2024年09月29日, 研究論文（学術雑誌）, 共同, 256, 0266-3538, DOI(公開)(r-map)
• Simultaneous optimization of fiber paths and geometric dimensions for fiber composite laminates using double neural network-surrogate model and genetic algorithm
  Asakawa, Kenji; Hirano, Yoshiyasu; Ogasawara, Toshio
  ADVANCED COMPOSITE MATERIALS
  TAYLOR & FRANCIS LTD
  CFRP is characterized by its anisotropic properties. Therefore, further structural weight reduction might be achieved by introducing the fiber direction as a design variable. For this study, steering fiber laminates defined by a Bezier curve are applied to a skin panel of CFRP stiffened panels. Then, simultaneous optimization of the fiber paths and stringer dimensions is performed to minimize the panel weight. We propose a new surrogate model that combines two neural networks and Latin hypercube sampling. Stiffness, manufacturability, and buckling load are introduced as constraints. Also, optimization is performed using the surrogate model and a genetic algorithm (GA). Furthermore, the stringer dimensions and fiber directions are optimized for straight fiber laminates. Comparison of steering fiber laminates and straight fiber laminates demonstrated that the introduction of steering layup into skin plates can reduce the stringer weight by up to 25.6%. An effective method for designing the geometric dimensions and layup path is provided.
  2024年09月02日, 研究論文（学術雑誌）, 共同, 33, 5, 0924-3046, DOI(公開)(r-map), 839, 861
• Nonlinear electrical conductivity characteristics under high impulse current and applications to lightning strike damage simulation for CFRP laminates
  Fujisawa, Yu; Sato, Takumi; Hirano, Yoshiyasu; Kamiyama, Shintaro; Ogasawara, Toshio
  COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
  ELSEVIER SCI LTD
  This experimental investigation assessed conductive properties of quasi-isotropic CFRP laminates in the thickness direction under high impulse current and clarified the properties' effects on lightning damage behaviours. For CFRP laminates with interleaf resin layers (T800/3900-2B), experiments confirmed that conductivity in the thickness direction increases irreversibly with applied impulse current (approx. 5.3 kA, approx. 3.2 kV). However, the conductivity of CFRP laminates without interleaf resin layers (T800/2592) changed little during testing. Nonlinear conductive behaviour was applied to lightning strike damage numerical simulations using a coupled thermal-electrical analysis and heat transfer analysis. For numerical analyses, shape and dimensional changes of the applied current on the specimen surface were considered based on high-speed observations made during simulated lightning strike testing. The pyrolysis region calculated using damage analysis agrees well with experimentally obtained results when considering the potential gradient dependence of conductivity: better agreement was obtained than when calculated under a constant value.
  2024年08月, 研究論文（学術雑誌）, 共同, 183, 1359-835X, DOI(公開)(r-map)
• Radiation heating tests to evaluate low-emissivity porous ceramics coatings for stand-off thermal protection systems
  Akamine, Shuko; Sudo, Yasuko; Ogawa, Chiharu; Aoki, Takuya; Ogasawara, Toshio
  ACTA ASTRONAUTICA
  PERGAMON-ELSEVIER SCIENCE LTD
  Diffuse reflection of thermal radiation transfer by Mie scattering can provide a thermal barrier without conversion leading to conduction heat transfer. Applying such a system to internal thermal insulating materials of a stand-off thermal protection systems (TPS) provides an efficient means of preventing thermal radiation transfer. Porous MgAl2O4 ceramics have high thermal resistance because of their low radiation absorption over a wide range from visible to near-infrared wavelengths. For this study, after porous MgAl2O4 ceramics was coated onto a fibrous insulator surface, we investigated its application to stand-off TPS, especially targeting reusable space transportation systems. Direct infrared heating tests were conducted in vacuum. Indirect infrared heating tests were done using graphite as a surface panel in an arc-heated wind tunnel with a high heat flux rate. The apparent thermal conductivity was obtained from the unsteady-state thermal history of the infrared heating experiment using an arc-heated wind tunnel to evaluate the radiation thermal barrier effects of the porous MgAl2O4 ceramics. The low emissivity of porous MgAl2O4 ceramics suppressed heat input and maintained a low surface temperature. Results suggest that thermal radiation transfer was suppressed and that the apparent thermal conductivity of the fibrous insulator was reduced.
  2024年06月, 研究論文（学術雑誌）, 共同, 219, 0094-5765, DOI(公開)(r-map), 810, 817
• Clarifying the mechanisms of edge glow generation in CFRP laminates exposed to simulated lightning currents
  Kamiyama, Shintaro; Okada, Takao; Hirano, Yoshiyasu; Sonehara, Takeo; Miyaki, Hiromitsu; Ogasawara, Toshio
  COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
  ELSEVIER SCI LTD
  This study examines edge glow mechanisms of CFRP laminates exposed to simulated lightning current by per-forming direct electrical conduction tests. An impulse electric current, in accordance with SAE ARP 5412B, was applied to the laminates. Numerical simulations based on finite element analysis (FEA) were performed to clarify the voltage and temperature distributions of the CFRP laminates. The analytical results were validated using the experimentally obtained I-V characteristics and temperature responses. Resultingly, edge glow was observed in quasi-isotropic but not in unidirectional and cross-ply laminates. The edge glow was suppressed more in silicone oil than in air. When the edge glow did not occur, the numerical simulation results, I-V characteristics, and temperature response, exhibited good agreement with the experimentally obtained results. Contrary to Joule heating, potential differences of several hundred volts between each layer, which cause dielectric breakdown in the testing atmosphere, are the criterion for edge glow formation.
  2024年02月, 研究論文（学術雑誌）, 共同, 177, 1359-835X, DOI(公開)(r-map)
• Bio-inspired study of stiffener arrangement in composite stiffened panels using a Voronoi diagram as an indicator
  Asakawa, Kenji; Hirano, Yoshiyasu; Tan, Kwek-Tze; Ogasawara, Toshio
  COMPOSITE STRUCTURES
  ELSEVIER SCI LTD
  Taking a biomimetic approach, this study introduces the use of a Voronoi diagram as an indicator of stiffener arrangement in stiffened composite panels. The locations of generator points that determine the shape of the Voronoi diagram are optimized for buckling problems under compression and shear load. An original optimization algorithm that combines the genetic algorithm and the finite element method is developed and implemented. The Voronoi diagram can also be used as an indicator for conventional, periodical stiffener shapes such as grid, lattice, honeycomb, and isogrid. We conducted parametric studies for periodical stiffener shapes, and demonstrated that these shapes can be designed using Voronoi diagrams. The results revealed that the optimized panel has a higher buckling load than that of conventional panels, and this methodology is effective for designing biomimetic stiffened CFRP panel structures.
  2024年01月01日, 研究論文（学術雑誌）, 共同, 327, 0263-8223, DOI(公開)(r-map)
• Matrix Crack Detection in Cross-ply CFRP Laminates with an FBG Sensor Based on Optical Frequency Domain Reflectometry
  YUKINO IKEDA, SHIN-ICHI TAKEDA, SHINSAKU HISADA, TOSHIO OGASAWARA
  PROCEEDINGS OF THE AMERICAN SOCIETY FOR COMPOSITES-THIRTY-EIGHTH TECHNICAL CONFERENCE
  2023年09月, 研究論文（国際会議プロシーディングス）, 共同, DOI(公開)(r-map)
• Experimental Investigation of Helium Gas Leakage Behavior of CFRP Laminates with Partially Thin-Ply Laminates under Biaxial Stress at 20 K
  KAZUYOSHI FUJISHIRO, DAIGO SATO, HISASHI KUMAZAWA, HITOSHI HAMORI, TOSHIO OGASAWARA
  PROCEEDINGS OF THE AMERICAN SOCIETY FOR COMPOSITES-THIRTY-EIGHTH TECHNICAL CONFERENCE
  2023年09月, 研究論文（国際会議プロシーディングス）, 共同, DOI(公開)(r-map)
• Progressive Failure Analysis of Fiber Steering Composite Structures with a Hole
  MASATAKA MIZUMOTO, KENJI ASAKAWA, YOSHIYASU HIRANO, TOSHIO OGASAWARA
  PROCEEDINGS OF THE AMERICAN SOCIETY FOR COMPOSITES-THIRTY-EIGHTH TECHNICAL CONFERENCE
  2023年09月, 研究論文（国際会議プロシーディングス）, 共同, DOI(公開)(r-map)
• Experimental evaluation of filled-hole compressive strengths of thin-ply carbon fiber / epoxy composite laminates
  Ogasawara, Toshio; Mikami, Tomoisa; Takamoto, Kota; Asakawa, Kenji; Aoki, Kazuyuki; Uchiyama, Shigekazu; Sugimoto, Sunao; Yokozeki, Tomohiro
  COMPOSITES SCIENCE AND TECHNOLOGY
  ELSEVIER SCI LTD
  By experimentation, this study investigated ply thickness effects on the filled hole compression (FHC) strength of thin-ply CFRP laminates. The FHC strength of quasi-isotropic (QI) laminates increased by 26-45% with decreasing ply thickness from 0.2 to 0.05 mm. Comparing the case of 0 Nm and 7.0 Nm tightening torque, the FHC strength was more than 28-49% higher for the QI laminates with a tightening torque of 7.0 Nm. The FHC strength of thin-ply QI-CFRP (0.05 mm ply thickness) at a fastener tightening torque of 7 Nm was 675 MPa, which was greater than the un-notched compressive (UNC) strength (590 MPa). Visual observation and X-ray CT results of fractured specimens after FHC testing suggested that bearing damage of the CFRP laminates was prevented under adequate fastener tightening torque. It was inferred that the increase in the FHC strength in thin-ply CFRP was mainly contributed by the increase in the UNC and OHC strength.
  2023年05月26日, 研究論文（学術雑誌）, 共同, 237, 0266-3538, DOI(公開)(r-map)
• Raman spectroscopy used for estimating the effective elastic modulus of carbon nanotubes in aligned multi-walled carbon nanotubes/ epoxy composites under tensile loading
  Aoki, Ayaka; Ogasawara, Toshio; Aoki, Takuya; Ishida, Yuichi; Shimamura, Yoshinobu; Inoue, Yoku
  COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
  ELSEVIER SCI LTD
  This study used polarized Raman spectroscopy to evaluate strain in multi-walled carbon nanotubes (MWCNTs) in aligned MWCNT/ epoxy composites to clarify the effective elastic modulus of MWCNTs in the composites. The Raman shift rate of the G' band of the MWCNT corresponding to the tensile strain (%) of the composite specimen was 18.84 cm(-1)/%. Reported values of the Raman shift rate for pitch-based carbon fibers indicated the effective Young's modulus of the MWCNT as approximately 377 GPa. Using Mori-Tanaka theory and considering the three-dimensional orientation distribution of MWCNT, the effective Young's modulus of the MWCNT was estimated as 400 GPa. The results demonstrated Raman spectroscopy as useful for experimental evaluation of the effective Young's modulus of MWCNT in the composite.
  2023年04月, 研究論文（学術雑誌）, 共同, 167, 1359-835X, DOI(公開)(r-map)
• 航空機内装用CFRP/ハニカムサンドイッチパネルのエッジワイズ圧縮試験における表面材座屈挙動
  吉永 創, 小笠原 俊夫, 大栗 強
  日本複合材料学会誌
  2023年03月, 研究論文（学術雑誌）, 共同, 49 巻 (2023) 2 号/書誌, DOI(公開)(r-map), 33, 40
• Machine learning algorithms for deeper understanding and better design of composite adhesive joints
  Kaiser, Isaiah; Richards, Natalie; Ogasawara, Toshio; Tan, K. T.
  MATERIALS TODAY COMMUNICATIONS
  ELSEVIER
  In this study, machine learning (ML), a subdivision of artificial intelligence (AI), is implemented to study the mechanical behavior of composite adhesive single-lap joints (SLJs) subjected to tensile loading. The experimental data for training and testing the ML models are compiled from peer-reviewed journal papers from various research groups to eliminate bias and increase the diversity within the dataset. The dataset consists of eight continuous SLJ input parameters, which are used to predict the SLJ damage mode and failure strength. Regression and classification models are built using deep neural networks (DNN) and random forests (RF). Finite element (FE) modeling is conducted, and the numerical performance is compared with the accuracy of the regression ML models. Results show that ML models can predict strength with high accuracy. Furthermore, both DNN and RF classify damage modes accurately without the need for complex failure criteria, which cannot be typically achieved using traditional FE methods. This study utilizes ML algorithms to gain a deeper under-standing of the structure-property-performance relationships of SLJs, leading to better designs of composite adhesive joints with higher strength efficiency.
  2023年03月, 研究論文（学術雑誌）, 共同, 34, DOI(公開)(r-map)
• In situ optical observation of damage and failure process in adhesively bonded CFRP joints under mixed-mode loading
  Oshima, Sota; Mikami, Tomoisa; Yoshimura, Akinori; Hirano, Yoshiyasu; Ogasawara, Toshio
  COMPOSITE STRUCTURES
  ELSEVIER SCI LTD
  The effects of mode mixity on microscopic damage and failure process in adhesively bonded carbon fiber reinforced plastic (CFRP) joints were studied by in situ observation. Optical microscopy observation revealed that the damage and failure process were largely affected by the mixed-mode ratio of joints. The whitening of the adhesive resin due to cavitation was observed with an increasing mode I component, whereas the plastic zone length increased with an increasing mode II component. The damage and failure process observed by experiment were correlated with the stress state around the crack tip obtained by finite element analysis. The results indi-cated that the microscopic failure process well reflects the deformation and failure properties of epoxy resin depending on stress triaxiality.
  2023年02月01日, 研究論文（学術雑誌）, 共同, 305, 0263-8223, DOI(公開)(r-map)
• IーV characteristics and temperature response of unidirectional CFRP exposed to simulated lightning current in the fiber direction
  Shintaro Kamiyama, Yoshiyasu Hirano, Takao Okada, Takeo Sonehara, Toshio Ogasawara
  Composites Part A: Applied Science and Manufacturing
  ELSEVIER SCI LTD
  This study examined the I-V characteristics and temperature response of unidirectional CFRP exposed to simulated lightning current by performing direct electrical conduction tests that could minimize the effects of thermal flux from the arc root, complex arc behavior, and shock wave. A numerical analysis was carried out to clarify the heating mechanisms. The results show that the electrical conductivity of unidirectional CFRP in the fiber direction under impulse current tests is almost identical to that measured in the steady-state and becomes constant during lightning current increasing. Cross-sectional observation of the specimen revealed that matrix cracks and delamination occurred in the temperature range where the CFRP thermal decomposition occurred. In addition, it was necessary to consider the formation energy of the pyrolysis gas to estimate the temperature response, which was estimated to be approximately 2.163 x 10(7) J/kg for the toughened epoxy CFRP.
  2022年11月01日, 研究論文（学術雑誌）, 共同, 162, 1359-835X, DOI(公開)(r-map), 107111
• Application of machine learning for improved accuracy of simultaneous temperature and strain measurements of carbon fiber-reinforced plastic laminates using an embedded tilted fiber Bragg grating sensor
  Mikiko Kikuchi, Toshio Ogasawara, Shunpei Fujii, Shin-ichi Takeda
  Composites Part A: Applied Science and Manufacturing
  ELSEVIER SCI LTD
  Tilted FBG (TFBG) sensors exhibit capability for simultaneous measurement of temperature and strain. However, improving the measurement accuracy is difficult. This study examined the applicability of machine learning techniques for improving the accuracy of simultaneous measurement of temperature and strain of a TFBG sensor, and of a carbon fiber-reinforced plastic (CFRP) composite laminate using an embedded TFBG sensor. Temperature and strain were ascertained using machine learning methods, i.e. deep neural networks (deep NN) and support vector regression (SVR), from multiple peaks in the transmission spectrum. The results obtained using the machine learning methods were compared directly to those found using a conventional method with the simultaneous linear equation of strain and temperature cross-sensitivity by extracting two peaks from the transmission spectrum. Results demonstrated that the accuracy was improved significantly using deep NN method with Bayesian regularization compared to the conventional cross-sensitivity method.
  2022年10月01日, 研究論文（学術雑誌）, 共同, 161, 1359-835X, DOI(公開)(r-map), 107108
• Radiation heating test and development of porous MgAl2O4 ceramics with high thermal shielding effect based on Mie theory
  Shuko Akamine, Toshio Ogasawara, Chiharu Ogawa, Takuya Aoki
  JOURNAL OF THE AMERICAN CERAMIC SOCIETY
  WILEY
  Porous MgAl2O4 ceramics designated as THRMOSCATT(TM) have diffuse reflectance based on the Mie theory. The reflectance greatly suppresses radiation heat transfer and has low emissivity at 1-5 mu m wavelengths. Their thermal conductivity has been measured as less than 0.3 W/(m K) at 1500 degrees C. Furthermore, porous MgAl2O4 ceramics have near-zero hemispherical spectral emissivity values at 0.35-5 mu m wavelengths. High heat resistance and low emissivity materials in the atmosphere are useful for the innermost layer of industrial furnaces to confine energy efficiently. Additionally, this material is useful as a radiation reflectors, such as in stand-off thermal protection systems. This study elucidated the suppression of radiation transfer in porous MgAl2O4 ceramics attributable to low thermal emissivity. Therefore, the thermal insulation performance under radiation heating in vacuum, the emissivity validity evaluation of low-emissivity porous materials using finite element analysis, and microstructure effects on radiation heating performance and mechanical properties were investigated.
  2022年08月, 研究論文（学術雑誌）, 共同, 105, 8, 0002-7820, DOI(公開)(r-map), 5347, 5358
• Evaluation of thermosetting resin curing using a tilted fiber Bragg grating
  Itsuhiko Hirota, Shin-ichi Takeda, Toshio Ogasawara
  Composites Part A: Applied Science and Manufacturing
  ELSEVIER SCI LTD
  The strain, temperature and refractive index of a material can be evaluated from the Bragg and cladding modes in the transmission spectra of tilted fiber Bragg gratings (TFBGs). The strain and refractive index of thermosetting resin are evaluated from the changes in these indicators. Changing the mechanical strain of the TFBG (thus varying the refractive index from 1.56 to 1.64) negligibly changed the transmission spectrum, suggesting that strain and refractive index can be simultaneously measured. The curing process of the epoxy adhesive film was monitored by measuring the film's refractive index through the TFBG. The relationship between the refractive index and curing degree was quantified using the Kamal model based on isothermal curing kinetics. When measuring the degree of resin curing, the TFGB-based method performed at least as well as Fresnel reflection based fiber-optic sensors, demonstrating its usefulness in monitoring the strain and curing degree of thermosetting resin-based materials.
  2022年07月01日, 研究論文（学術雑誌）, 共同, 158, 1359-835X, DOI(公開)(r-map), 106956
• Direct comparison between monofilament and multifilament tow testing for evaluating the tensile strength distribution of SiC fibers
  Yoshito Ikarashi, Toshio Ogasawara, Shin-ichi Okuizumi, Takuya Aoki, Ian J Davies, Jacques Lamon
  Journal of the European Ceramic Society
  ELSEVIER SCI LTD
  The tensile strength distributions of five types of silicon carbide (SiC) fiber, namely, Nicalon, Hi-Nicalon, HiNicalon TypeS, Tyranno ZMI and Tyranno SA, were evaluated by monofilament and multifilament tow tensile testing with the estimated Weibull parameters being compared from each method. Whereas values for the Weibull scale parameter were found to be similar for both the monofilament and multifilament test methods, the Weibull shape parameter obtained from multifilament tow testing tended to be greater than that obtained from monofilament testing. The effect of diameter variation within individual fibers on the multifilament tow test results was investigated by Monte-Carlo simulations. In contrast with the experimentally obtained results, the shape parameters calculated by Monte-Carlo simulation exhibited good agreement with the monofilament test results.
  2022年05月01日, 研究論文（学術雑誌）, 共同, 42, 5, 0955-2219, DOI(公開)(r-map), 1928-1937
• Simultaneous measurement of strain and temperature using a tilted fiber Bragg grating
  Shin-ichi Takeda, Masashi Sato, Toshio Ogasawara
  Sensors and Actuators A: Physical
  ELSEVIER SCIENCE SA
  The strain, temperature and refractive index of a material can be evaluated from the Bragg and cladding modes in the transmission spectrum of tilted fiber Bragg gratings (TFBGs). The strain and temperature of resin-based composite materials are evaluated from the changes of these indicators. The sensitivities of the TFBG were acquired by changing either the temperature or mechanical strain while fixing the other parameter. The TFBG was then surface-mounted in a more practical environment in which both the tem-perature and strain changed. The test results showed that simultaneous measurement was possible, but the conventional method of extracting arbitrary peaks in cladding mode had low measurement accuracy. To improve this situation, two peaks were non-arbitrarily extracted to minimize the condition number. The proposed extraction method clearly improved the accuracy of strain and temperature measurements by the TFBG.(c) 2022 Elsevier B.V. All rights reserved.
  2022年03月01日, 研究論文（学術雑誌）, 共同, 335, 0924-4247, DOI(公開)(r-map), 113346
• Effects of ply thickness and 0°-layer ratio on failure mechanism of open-hole and filled-hole tensile tests of thin-ply composite laminates
  Ryoma Aoki, Ryo Higuchi, Tomohiro Yokozeki, Kazuyuki Aoki, Shigekazu Uchiyama, Toshio Ogasawara
  Composite Structures
  Elsevier
  Thin-ply technology provides increasing possibilities for composite structures, expanding the design space for ply thickness and laminate layup. This study examines the effects of ply thickness and the 0 degrees-layer ratio on the strength and damage behavior of thin-ply composite laminates. We conducted open-hole tensile (OHT) and filled-hole tensile (FHT) tests on laminates with various ply thicknesses and 0 degrees-layer ratios, observing the internal damage via X-ray radiography. It was confirmed that the damage retardation effect of the thin-ply reduced both the OHT and FHT strengths. Furthermore, the results revealed that laminates with a higher 0 degrees-layer ratio have higher strengths and the failure of laminates with a higher 0 degrees-layer ratio transitioned to splitting-dominated failure. Finite element analysis of the fastener restraint indicated that the fastener restraint alleviated the stress concentration in the 0 degrees-layer around the hole, potentially leading to a difference in the OHT and FHT strengths.
  2022年01月15日, 研究論文（学術雑誌）, 共同, 280, 0263-8223, DOI(公開)(r-map), 114926
• Effect of vacuum?ultraviolet irradiation in a nitrogen gas atmosphere on the adhesive bonding of carbon-fiber-reinforced polyphenylene sulfide composites
  S. Kawasaki, Y. Ishida, T. Ogasawara
  The Journal of Adhesion
  Taylor and Francis
  Recently, various physical surface treatment methods have been studied to improve the adhesive bonding strengths of fiber-reinforced thermoplastic resins. Excellent surface treatment methods in terms of treatment time, effective irradiation distance, and strength reliability are required. This study was carried out to evaluate the effect of vacuum-ultraviolet (VUV) irradiation on the bonding strength of a carbon-fiber-reinforced polyphenylene sulfide under a nitrogen atmosphere. Various surface treatment parameters, such as the treatment time, irradiation distance, atmosphere, and standing time after the surface treatment, were changed. The adhesive strength, evaluated through a compression shear test, was improved by the VUV irradiation treatment. Additionally, the joint surface fracture changed from an interface fracture to a cohesive fracture of the adhesive or adherend. Furthermore, the joint strength was improved even when the irradiation distance was increased. Furthermore, oxygen-containing functional groups were introduced at the sample surface upon the VUV treatment, according to X-ray photoelectron spectra.
  2022年01月02日, 研究論文（学術雑誌）, 共同, 98, 1, 0021-8464, DOI(公開)(r-map), 90, 104
• Damage-mechanics mesoscale modeling of composite laminates considering diffuse and discrete ply damages: Effects of ply thickness
  Aoki, Ryoma; Higuchi, Ryo; Yokozeki, Tomohiro; Aoki, Kazuyuki; Uchiyama, Shigekazu; Ogasawara, Toshio
  COMPOSITE STRUCTURES
  ELSEVIER SCI LTD
  Thin-ply composites are gaining significant attention owing to their high damage resistance and their ability to enhance design flexibility in a composite structure. Herein we proposed a damage mechanics model considering diffuse and discrete ply damages in thin-ply composite laminates for mesoscale simulation. To investigate the effects of ply thickness on damage evolution, loading and unloading tests were conducted using cross-ply, angleply, and quasi-isotropic laminates with several ply thicknesses. The damage evolution was quantitatively evaluated using continuum damage mechanics. The evolution laws of damage were formulated considering the ply thickness dependency. A damage simulation using the proposed model demonstrated that the retardation and suppression effects of thin-ply were captured by the proposed model. The simulation results also validated that the stiffness degradation and failure strength of laminates with three different ply thicknesses were predicted with good accuracy by considering both diffuse and discrete damages.
  2021年12月01日, 研究論文（学術雑誌）, 共同, 277, 0263-8223, DOI(公開)(r-map), 114609
• High-temperature fatigue crack propagation mechanism of orthogonal 3-D woven amorphous SiC Fiber/SiC/YSi2-Si matrix composites
  Kanazawa, Shingo; Yamazaki, Naoki; Asakura, Yuki; Kubushiro, Keiji; Ogasawara, Toshio
  JOURNAL OF THE AMERICAN CERAMIC SOCIETY
  WILEY
  To elucidate degradation mechanisms attributable to high-temperature fatigue crack propagation, a study was conducted of 3-D woven SiCf/SiC CMC in which amorphous SiC fiber was used as a reinforcement material and in which a matrix was formed through low-temperature melt infiltration. From a high-temperature fatigue test conducted at 1373 K in the atmosphere with stress of 142 MPa or more, the fracture lifetime of newly developed SiCf/SiC CMC was found to be longer than that of SiCf/SiC CMC, which uses crystalline SiC fiber. Furthermore, repeatedly applying high temperatures during high-temperature fatigue tests and using X-ray computed tomography, fatigue cracks were found to propagate in a direction across 0-degree fiber bundles that undergo stress. Electron mapping of regions with crack propagation revealed that oxidation eliminates boron nitride (BN), which has a crack deflection effect. The SiC fibers and matrix are fixed through the formation of oxides. Cracks propagate because of the consequent decrease in toughness of the SiCf/SiC CMC. In regions without crack propagation, fracture surfaces were not covered with oxides. These regions underwent forcible fracture in the final stage of the high-temperature fatigue tests. From the test results presented above, SiCf/SiC CMC is considered to undergo fracture when the effective cross-sectional area is reduced because of crack propagation accompanying oxidation and when the test load exceeds the tensile strength of the residual cross-sectional area. However, some cracks in the matrix produced by a low-temperature melt infiltration process were closed by oxides derived from YSi2. Because of crack closing, crack propagation is presumed to be avoided. Also, LMI-CMC showed excellent high-temperature fatigue properties at pressures higher than 150 MPa, which exceeds the proportional limit.
  2021年11月, 研究論文（学術雑誌）, 共同, 104, 11, 0002-7820, DOI(公開)(r-map), 5923, 5933
• High-speed observation of bending fracture process of carbon fiber reinforced plastic composite/Nomex (TM) honeycomb sandwich panel
  Ogasawara, Toshio; Yoshinaga, Hajime; Oiwa, Mae; Oguri, Tsuyoshi; Matsuda, Takamasa; Kusano, Hideaki; Yoshimura, Akinori
  JOURNAL OF SANDWICH STRUCTURES & MATERIALS
  SAGE PUBLICATIONS LTD
  Failure mechanism of sandwich panels is very complicated. The objective of this study is to demonstrate the usefulness of high-speed observation to elucidate the failure mechanism of sandwich panels. Failure processes of carbon fiber reinforced plastic composite/Nomex (TM) honeycomb sandwich panels were observed using two synchronized high-speed cameras with an 8 mu s frame rate. The sandwich panel was subjected to a four-point bending load in accordance with ASTM-D7249. Digital image correlation was also adopted for measuring the surface strain. Results show fracture initiation: (1) local (intra-cell or wrinkling) buckling of the face sheet at the edge (Type I and III), or (2) local buckling (intra-cell or wrinkling) of the face sheet at the middle of the specimen (Type II). Following local buckling of the face sheet, debonding between the face sheet and the honeycomb core occurred within 10-20 mu s. Subsequently, crack propagation of the face sheet occurred, leading to final failure of the sandwich panel. It was about 150-200 mu s from the local buckling of face sheet to the final failure of sandwich panel. Results demonstrated that high-speed observations are effective to elucidate failure mechanisms of the sandwich panel subjected to a bending load.
  2021年09月, 研究論文（学術雑誌）, 共同, 23, 6, 1099-6362, DOI(公開)(r-map), 1987, 1999
• Numerical analysis of face sheet buckling for a CFRP/Nomex honeycomb sandwich panel subjected to bending loading
  Oiwa, Mae; Ogasawara, Toshio; Yoshinaga, Hajime; Oguri, Tsuyoshi; Aoki, Takahira
  COMPOSITE STRUCTURES
  ELSEVIER SCI LTD
  The objective of this study is to establish a bending strength prediction method for a thin CFRP face sheet/ Nomex honeycomb sandwich panel, for which the failure mode is face-sheet/core debonding derived from local buckling of the face sheet. Stress and buckling eigenvalue analyses were conducted using a detailed core model reproducing honeycomb structure and a solid core model in which the core was homogenized as solid elements. In both the detailed model and the solid core model, the buckling load calculated using the buckling eigenvalue analysis agreed well with the experimentally obtained failure loads. Results also showed that the face sheet buckling waveform was not intra-cell buckling but global buckling. The computational time was reduced to less than one-half using the homogenized honeycomb core (solid elements). The results imply that the homogenized solid core model is suitable for estimating the bending strength of the CFRP/Nomex honeycomb sandwich panel.
  2021年08月15日, 研究論文（学術雑誌）, 共同, 270, 0263-8223, DOI(公開)(r-map), 114037
• Experimental and numerical studies of the open-hole compressive strength of thin-ply CFRP laminates
  Takamoto, Kota; Ogasawara, Toshio; Kodama, Hiroki; Mikami, Tomoisa; Oshima, Sota; Aoki, Kazuyuki; Higuchi, Ryo; Yokozeki, Tomohiro
  COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
  ELSEVIER SCI LTD
  Thin prepregs with thickness of less than 0.06 mm support flexible lamination design because it is possible to apply various stacking sequences. The objective of this study is to elucidate the effects of the layer thickness and stacking sequence on the open-hole compressive (OHC) strength for thin-ply carbon fiber reinforced plastic composite (CFRP) laminates. Details of layer thickness and stacking sequence effects on the OHC strength for the thin-ply CFRP laminates were evaluated experimentally. Furthermore, finite element analyses incorporating Hashin?s 2-D failure criteria and a cohesive zone model were conducted to evaluate the damage progression behavior. Results demonstrated that the numerical model was useful for predicting the OHC strength of thin-ply CFRP laminates with various stacking sequences.
  2021年06月, 研究論文（学術雑誌）, 共同, 145, 1359-835X, DOI(公開)(r-map), 106365
• 直交3次元非晶質SiC繊維/ SiC/ YSi2-Si基複合材料の開発
  金澤 真吾, 山崎 直樹, 朝倉 勇貴, 久布白 圭司, 石川 毅彦, 小笠原 俊夫
  材料
  日本材料学会
  2021年02月, 研究論文（学術雑誌）, 共同, 70, 2, DOI(公開)(r-map), 86, 92
• Nonlinear stress-strain behavior of unidirectional carbon fiber/ phenyl-ethynyl terminated KAPTON-type polyimide, TriA-X, composites at elevated temperatures
  Minegishi, Ryuunosuke; Ogasawara, Toshio; Aoki, Takuya; Ishida, Yuichi
  ADVANCED COMPOSITE MATERIALS
  TAYLOR & FRANCIS LTD
  A phenyl-ethynyl terminated polyimide resin based on KAPTON-type backbone structures, 'TriA-X', polyimide is promising as a matrix resin of heat-resistant carbon fiber reinforced plastic composites, but its mechanical properties remain unclear. This study examined off-axis stress-strain behavior of unidirectional carbon fiber (CF)/TriA-X polyimide composites under tensile load at room temperature (RT), 100 degrees C, 150 degrees C, and 200 degrees C to elucidate the matrix resin plastic deformation behavior. Comparing the rupture stress and rupture strain of off-axis specimens at RT and 100 degrees C, they decreased concomitantly with increasing test temperature. Comparison of the rupture stress at 100 degrees C, 150 degrees C and 200 degrees C revealed no significant difference in the rupture stress. A one-parameter plasticity model proposed by Chen and Sun with temperature-dependence of the plasticity model parameters elucidated the nonlinear stress-strain behavior. Model results agreed well with the nonlinear stress-strain behaviors of the CF/TriA-X composites at RT, 100 degrees C, 150 degrees C, and 200 degrees C.
  2021年01月02日, 研究論文（学術雑誌）, 共同, 30, 1, 0924-3046, DOI(公開)(r-map), 24, 38
• Micromechanical model of time-dependent damage and deformation behavior for an orthogonal 3D-woven SiC/SiC composite at elevated temperature in vacuum
  Ikarashi, Yoshito; Ogasawara, Toshio; Aoki, Takuya
  JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
  ELSEVIER SCI LTD
  This paper presents a micromechanical model to predict the time-dependent damage and deformation behavior of an orthogonal 3-D woven SiC fiber/BN interface/SiC matrix composite under constant tensile loading at elevated temperature in vacuum. In-situ observation under monotonic tensile loading at room temperature, load-unload tensile testing at 1200 degrees C in argon, and constant load tensile testing at 1200 degrees C in vacuum were conducted to investigate the effects of microscopic damage on deformation behavior. The experimentally obtained results led to production of a time-dependent nonlinear stress-strain response model for the orthogonal 3-D woven SiC/SiC. It was established using the linear viscoelastic model, micro-damage propagation model, and a shear-lag model. The predicted creep deformation was found to agree well with the experimentally obtained results.
  2020年09月, 研究論文（学術雑誌）, 共同, 40, 12, 0955-2219, DOI(公開)(r-map), 3887, 3896
• 熱可塑性ポリイミドを介した炭素繊維ポリイミド複合材料の熱融着強度に及ぼす真空紫外光照射の影響
  川崎 翔大, 山崎 誠仁, 小笠原 俊夫, 石田 雄一
  日本複合材料学会誌
  日本複合材料学会
  2020年09月, 研究論文（学術雑誌）, 共同, 46, 4, DOI(公開)(r-map), 143, 149
• Experimental and analytical validation of mode II fracture toughness tests for a type of double-lap joint
  Oshima, Sota; Yoshimura, Akinori; Yahiro, Shigeki; Hirano, Yoshiyasu; Ogasawara, Toshio
  COMPOSITE STRUCTURES
  ELSEVIER SCI LTD
  Mode II fracture toughness tests for a type of double-lap joint referred to as the doubly end notched tension (DENT) tests were validated by experimental and numerical approaches. Crack growth behavior of two cracks was simultaneously observed during fracture toughness tests and analyzed by the digital image correlation (DIC) method. As one of the two cracks propagated first and the other followed, finite element (FE) analyses were carried out to clarify the mechanisms. The results of FE analyses showed that mode II energy release rate at the extended crack tip increased at the beginning of crack growth, and subsequently decreased under constant displacement condition. An opposite trend was found at the other crack tip. One cause of this phenomenon was due to local bending of the specimen. The effects of the geometry of specimens were also discussed. The FE analyses also revealed that the ratio of middle layer thickness to the outer layers thickness significantly affects the crack growth behavior in the DENT specimens.
  2020年02月15日, 研究論文（学術雑誌）, 共同, 234, 0263-8223, DOI(公開)(r-map)
• Damage behavior of CFRP subjected to simulated lightning current under air, reduced-pressure air, and N-2 environments
  Kamiyama, Shintaro; Hirano, Yoshiyasu; Okada, Takao; Sawaki, Koji; Sonehara, Takeo; Ogasawara, Toshio
  COMPOSITE STRUCTURES
  ELSEVIER SCI LTD
  This study examined lightning strike damage behaviors of carbon fiber reinforced plastic (CFRP) laminates under air (0.1 MPa), reduced-pressure air (0.02 MPa), and N-2 (0.1 MPa) environments to elucidate the effects of atmospheric environments on lightning damage. Simulated lightning current in accordance with SAE-ARP 5412B was applied to each specimen. The maximum current peak value was defined as 40 kA. CFRP laminates under reduced-pressure air (0.02 MPa) exhibited slight damage compared with that under atmospheric-pressure air. By contrast, CFRP laminates under N-2 sustained considerably more damage than under air (0.1 MPa). High-speed observations revealed that the atmospheric gas and pressure affect the arc root behavior. Finite element analysis was conducted based on experimentally obtained results to model lightning strike damage. The arc root length captured using a high-speed camera was incorporated into the analytical model. Numerical analysis results showed good correspondence with experimentally obtained results. These experimental and analytical results indicate that arc root behavior strongly affects lightning strike damage.
  2019年12月15日, 研究論文（学術雑誌）, 共同, 230, 0263-8223, DOI(公開)(r-map), 111519
• In-situ observation of microscopic damage in adhesively bonded CFRP joints under mode I and mode II loading
  Oshima, Sota; Yoshimura, Akinori; Hirano, Yoshiyasu; Ogasawara, Toshio; Tan, Kwek-Tze
  COMPOSITE STRUCTURES
  ELSEVIER SCI LTD
  Microscopic failure mechanisms in adhesively bonded joints of carbon fiber reinforced polymer (CFRP) structures were studied, and in-situ observation during fracture toughness tests under mode I and mode II loading were carried out. Strain in the adhesive layer was quantitatively evaluated by applying the digital image correlation (DIC) method to micrographs. Strain concentration was observed along the CFRP/adhesive interface under mode I loading. On the other hand, strain concentration and microcracks around the polyester carrier was observed under mode II loading. The macroscopic crack growth occurred due to the coalescing of microcracks under mode II loading. The maximum principal strain in adhesive resin under mode II loading at the onset of crack growth was significantly larger than that under mode I loading. The effects of distance from specimen edge on the crack growth behavior were also studied using the X-ray computed tomography.
  2019年11月01日, 研究論文（学術雑誌）, 共同, 227, 0263-8223, DOI(公開)(r-map)
• Oxidation mechanisms of SiC-fiber-reinforced Si eutectic alloy matrix composites at elevated temperatures
  Tsunoura, Toru; Yoshida, Katsumi; Yano, Toyohiko; Aoki, Takuya; Ogasawara, Toshio
  JOURNAL OF THE AMERICAN CERAMIC SOCIETY
  WILEY
  SiC-fiber-reinforced binary Si eutectic alloy composites have been developed for aerospace applications using the melt infiltration method. In this study, the oxidation mechanisms of various binary Si eutectic alloys were evaluated at elevated temperatures. We suggest that the oxidation resistance of eutectic alloys could be predicted using the Gibbs energy change for the oxidation reaction. Based on these calculations, eutectic alloys of Si-16at%Ti, Si-17at%Cr, Si-22at%Co, Si-38at%Co, and Si-27at%Fe were prepared. These alloys produced uniform SiO2 layers and showed the same oxidation resistance as Si at 1000 degrees C under humid conditions. Therefore, SiC composites using Si alloys with excellent oxidation resistance can be predicted using thermodynamic calculations.
  2019年10月, 研究論文（学術雑誌）, 共同, 102, 10, 0002-7820, DOI(公開)(r-map), 6309, 6321
• Fabrication and bending behavior of amorphous SiC-fiber-reinforced Si-Co eutectic alloy composites at elevated temperatures
  Tsunoura, Toru; Yoshida, Katsumi; Yano, Toyohiko; Aoki, Takuya; Ogasawara, Toshio
  COMPOSITES PART B-ENGINEERING
  ELSEVIER SCI LTD
  Amorphous SiC-fiber-reinforced Si-CoSi2 and CoSi2-CoSi eutectic alloys composites have been developed by a melt infiltration method, and their mechanical properties were evaluated at elevated temperatures up to 1220 degrees C. As compared to polycrystalline Si, Si-Co ingots showed a ductile transition at a lower temperature (200-400 degrees C) due to the ductile transition of CoSi2 and the presence of a debonding interface. Moreover, the composites using Si-Co alloys showed superior bending behavior at elevated temperatures around 1000 degrees C as compared to composites using Si because of the ductile behavior of the Si-Co alloys and the prevention of the degradation of the SiC fibers.
  2019年05月01日, 研究論文（学術雑誌）, 共同, 164, 1359-8368, DOI(公開)(r-map), 769, 777
• Effects of cyclic tensile loading on the rupture behavior of orthogonal 3-D woven SiC fiber/SiC matrix composites at elevated temperatures in air
  Ikarashi, Yoshito; Ogasawara, Toshio; Aoki, Takuya
  JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
  ELSEVIER SCI LTD
  This study examined the rupture mechanisms of an orthogonal 3D woven SiC fiber/BN interface/SiC matrix composite under combination of constant and cyclic tensile loading at elevated temperature in air. Monotonic tensile testing, constant tensile load testing, and tension-tension fatigue testing were conducted at 1100 degrees C. A rectangular waveform was used for fatigue testing to assess effects of unloading on the damage and failure behavior. Microscopic observation and single-fiber push-out tests were conducted to reveal the rupture mechanisms. Results show that both oxidative matrix crack propagation attributable to oxidation of the fiber-matrix interface and the decrease in the interfacial shear stress (IFSS) at the fiber-matrix interface significantly affect the lifetime of the SiC/SiC composites. A rupture strength degradation model was proposed using the combination of the oxidative matrix crack growth model and the IFSS degradation model. The prediction roughly agreed with the experimentally obtained results.
  2019年04月, 研究論文（学術雑誌）, 共同, 39, 4, 0955-2219, DOI(公開)(r-map), 806, 812
• Long-term thermal stability of carbon fibre-reinforced addition-type polyimide composite in terms of compressive strength
  Kubota, Yuki; Furuta, Takefumi; Aoki, Takuya; Ishida, Yuichi; Ogasawara, Toshio; Yokota, Rikio
  ADVANCED COMPOSITE MATERIALS
  TAYLOR & FRANCIS LTD
  A previously developed carbon fibre-reinforced addition-type polyimide composite material was exposed to temperatures of 240, 270 and 300 degrees C in air for 3000 h to study its long-term stability in terms of its compressive strength. The in-plane shear modulus, compressive failure mode and transverse crack density were also evaluated to determine whether a degradation process induces a decrease in the compressive strength of a high-temperature polymer matrix composite having a laminated configuration of [90/0](4s). The carbon fibre-reinforced polyimide composite exhibited excellent thermal stability in terms of its compressive strength after being subjected to ageing at 240 degrees C for 3000 h and at 270 degrees C for 2000 h, with degradation becoming significant at 300 degrees C. The compressive strength decreased only when the surface degradation caused the 90 degrees plies sandwiching the 0 degrees plies to degrade severely.
  2019年03月04日, 研究論文（学術雑誌）, 共同, 28, 2, 0924-3046, DOI(公開)(r-map), 115, 133
• Polyaniline-based all-polymeric adhesive layer: An effective lightning strike protection technology for high residual mechanical strength of CFRPs
  Kumar, Vipin; Yokozeki, Tomohiro; Okada, Takao; Hirano, Yoshiyasu; Goto, Teruya; Takahashi, Tatsuhiro; Hassen, Ahmed Arabi; Ogasawara, Toshio
  COMPOSITES SCIENCE AND TECHNOLOGY
  ELSEVIER SCI LTD
  Carbon fiber reinforced plastics (CFRPs) are vulnerable to lightning strikes due to their low electrical conductivity and low heat resistance. A lightning strike can damage CFRP structure catastrophically. Most common lightning strike protection (LSP) technology, consists of expanded metal foils/films on top of composite structures. This technology possesses disadvantages such as increased weight, galvanic corrosion, expensive integration and repair costs. In the present study, authors introduce a novel, easy to apply and all-polymeric LSP material. A doped intrinsic conductive polymer i.e. Polyaniline (PANI) dispersed in a thermosetting cross-linking polymer divinylbenzene (DVB) has been used to prepare an adhesive layer of 0.25-0.4 mm thickness. CFRP structure coated with PANI-based LSP layer, when tested against simulated lightning impulse current of 100 kA, demonstrated effective dissipation of the current, rendering almost 100% safety to the CFRP structure. PANI showed the capability to create a 3-D conductive network due to its self-assembling property, which makes it superior compared to its counterpart carbon/metal nano-filler based LSP technologies. Almost 100% residual strength of PANI-LSP protected CFRPs is reported in this work.
  2019年03月01日, 研究論文（学術雑誌）, 共同, 172, 0266-3538, DOI(公開)(r-map), 49, 57
• Interleaved MWCNT buckypaper between CFRP laminates to improve through-thickness electrical conductivity and reducing lightning strike damage
  Kumar, Vipin; Sharma, Sushant; Pathak, Abhishek; Singh, Bhanu P.; Dhakate, Sanjay R.; Yokozeki, Tomohiro; Okada, Takao; Ogasawara, Toshio
  COMPOSITE STRUCTURES
  ELSEVIER SCI LTD
  With the recent development in fabrication of various electrically conducive composites using various conductive fillers, there is a new trend among researchers to realize electrically conducive carbon fiber reinforced composite (CFRP) for lightning strike protection. Traditional epoxy-based CFRP does not provide enough electrically conducive paths to the incident lightning current for the fast dissipation, leading to evaporation of resin and fiber damage around lightning attachment zone. In this work, multiwall carbon nanotube (MWCNT) buckypaper (BP) are interleaved between CFRP laminates to replace the resin rich area with epoxy impregnated BP. This interleaved BP not only effectively enhanced the in-plane and through-thickness electrical conductivity of the CFRP laminate but also improved resistance against lightning strikes. Electrical conductivity is improved by 697% and 643% in in-plane and through-thickness direction respectively. SEM confirmed the proper impregnation of BP and good interphase between carbon fiber and BP layers. Simulated lightning test of 40 kA is conducted on pristine and BP-interleaved composites. Improved electrical conductivity in BP composite proved to be highly effective against lightning strike confirmed by the residual mechanical test.
  2019年02月15日, 研究論文（学術雑誌）, 共同, 210, 0263-8223, DOI(公開)(r-map), 581, 589
• New thermal protection system using high-temperature carbon fibre-reinforced plastic sandwich panel
  Y. Kubota, O. Miyamoto, T. Aoki, Y. Ishida, T. Ogasawara, S. Umezu
  Acta Astronautica
  2019年02月, 研究論文（学術雑誌）, 共同, DOI(公開)(r-map)
• Effect of through-thickness electrical conductivity of CFRPs on lightning strike damages
  Kumar, Vipin; Yokozeki, Tomohiro; Okada, Takao; Hirano, Yoshiyasu; Goto, Teruya; Takahashi, Tatsuhiro; Ogasawara, Toshio
  COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
  ELSEVIER SCI LTD
  Making carbon fiber reinforced plastics electrically conductive is an amended solution to the current lightning strike protection technology. However, optimization of the through-thickness electrical conductivity to meet a safety requirement of aircraft against lightning strikes remains unexplored. In this work, four carbon fiber reinforced plastics panels with different through-thickness electrical conductivity were fabricated using a polyaniline-based conductive resin. Their through-thickness electrical conductivity was tailored to achieve specific values using a controlled thermal treatment. The fabricated carbon fiber reinforced plastics panels were tested against a simulated lightning current of 40 kA, and the influence of through-thickness electrical properties on the performance of lightning strike protection was studied. Thermography data and ultrasonic non-destructive testing images confirmed least damage on the sample with higher electrical conductivity. Specimen with through-thickness electrical conductivity of around 110 S/m was able to retain about 92% of the residual flexural strength after the lightning test.
  2018年11月, 研究論文（学術雑誌）, 共同, 114, 1359-835X, DOI(公開)(r-map), 429, 438
• Heat-resistant sandwich structure with carbon fiber-polyimide composite faces and a carbon foam core
  Ogasawara, Toshio; Ayabe, Shingo; Ishida, Yuichi; Aoki, Takuya; Kubota, Yuki
  COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
  ELSEVIER SCI LTD
  This paper presents the processing and properties of a new heat-resistant sandwich structure, which consist of carbon fiber-polyimide composite face sheets and a carbon foam core. A novel phenylethynyl-terminated imide oligomer (TriA-X) was applied for both matrix resin and film adhesive. Mechanical properties of the sandwich structures were evaluated using flat-wise tension tests, and three-point bending tests. Bending strength of the sandwich panel was almost constant up to 250 degrees C. The bending rigidity of the sandwich panels showed good agreement with the numerical result by considering the temperature-dependent elastic modulus of CFRP and carbon foam. Thermal insulating properties of the sandwich structures were evaluated using infrared lamp heating tests in a vacuum chamber, resulting in good thermal insulating property. Heat transfer analysis of the sandwich structures was conducted using finite element method. Comparison with heating test results, the validity of the heat transfer analysis model was successfully demonstrated.
  2018年11月, 研究論文（学術雑誌）, 共同, 114, 1359-835X, DOI(公開)(r-map), 352, 359
• Experimental method for mode I fracture toughness of composite laminates using wedge loaded double cantilever beam specimens
  Oshima, Sota; Yoshimura, Akinori; Hirano, Yoshiyasu; Ogasawara, Toshio
  COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
  ELSEVIER SCI LTD
  This study proposes a simple and accurate data reduction scheme for the wedge loaded double cantilever beam (DCB) specimen. The effects of axial loading applied by wedges were considered for the evaluation of mode I energy release rate. Furthermore, a methodology for the determination of crack length during the tests was proposed. The presented method was verified by both finite-element (FE) analyses and fracture toughness tests. The results of the FE analyses showed that the mode I energy release rate obtained by the presented method well agreed with that obtained by the virtual crack closure method. Both the wedge loaded DCB and standard DCB tests were carried out to verify the presented method with unidirectional carbon fiber reinforced composites. Mode I fracture toughness obtained by the wedge loaded DCB tests was almost identical to that obtained by the standard DCB tests.
  2018年09月, 研究論文（学術雑誌）, 共同, 112, 1359-835X, DOI(公開)(r-map), 119, 125
• Delamination analysis of CFRP laminates exposed to lightning strike considering cooling process
  Kamiyama, Shintaro; Hirano, Yoshiyasu; Ogasawara, Toshio
  COMPOSITE STRUCTURES
  ELSEVIER SCI LTD
  This study examined the damage mechanisms of CFRP laminates exposed to lightning strike. Simulated lightning current testing elucidated the CFRP laminate damage behavior. Thermogravimetric analysis results revealed the pyrolysis behavior. Coupled thermal-electrical analysis, heat transfer analysis, and stress analysis using cohesive elements were conducted using finite element method (FEM) incorporating a CFRP thermal decomposition model. Delamination was simulated using a cohesive-element model. As results, it was revealed that the consideration of cooling processes after the application of impulse current is significantly important as elucidating the lightning strike damage mechanism. Numerical analysis results corresponded with experimentally obtained results, but with a smaller delamination area, which implied that reduced interlaminar strength (fracture toughness) attributable to the progress of thermal decomposition accompanying heat generation dominated delamination from lightning strike damage. In addition, other phenomena including mechanical loading also affect lightning strike damage.
  2018年07月15日, 研究論文（学術雑誌）, 共同, 196, 0263-8223, DOI(公開)(r-map), 55, 62
• Lightning strike damage behavior of carbon fiber reinforced epoxy, bismaleimide, and polyetheretherketone composites
  Kamiyama, Shintaro; Hirano, Yoshiyasu; Okada, Takao; Ogasawara, Toshio
  COMPOSITES SCIENCE AND TECHNOLOGY
  ELSEVIER SCI LTD
  This study examined lightning strike damage to cross-ply carbon fiber reinforced epoxy (CF/epoxy), bismaleimide (CF/BMI), and polyetheretherketone (CF/PEEK) composite laminates to clarify the effects of the resin properties on lightning strike damage to CFRP laminates. Simulated lightning current (Component A) in accordance with SAE ARP 5412B was applied to each specimen. The maximum current was defined as 40 kA and 100 kA. The duration of impulse current T-1/T-2 was approximately 30/80 mu s. Results show that CF/BMI and CF/ PEEK sustained remarkably minor damage such as carbon fiber breakage, changes in color of matrix resin, and delamination on the front surface compared to CF/epoxy. Moreover, no remarkable delamination was observed inside CF/BMI or CF/PEEK. These experimentally obtained results indicate that the electrical conductivity and onset temperature of thermal decomposition, the char yield, the interlaminar fracture toughness and other material properties strongly affect lightning strike damage to CFRP laminates.
  2018年06月16日, 研究論文（学術雑誌）, 共同, 161, 0266-3538, DOI(公開)(r-map), 107, 114
• Long-term thermal stability of addition-type polyimide resins derived from pyromellitic dianhydride, 2-phenyl-4,4-diaminodiphenyl ether, and 4-phenylethynylphtalic anhydride
  Kubota, Yuki; Furuta, Takefumi; Ishida, Yuichi; Yokota, Rikio; Miyauchi, Masahiko; Aoki, Takuya; Ogasawara, Toshio
  HIGH PERFORMANCE POLYMERS
  SAGE PUBLICATIONS LTD
  The previously developed TriA-X polyimide resin, consisting of pyromellitic dianhydride/2-phenyl-4,4-diaminodiphenyl ether; 9,9-bis(4-aminophenyl)fluorene/4-phenylethynylphthalic anhydride (PEPA), was exposed for 3000 h to air at 180, 240, and 270 degrees C or a vacuum environment at 270 degrees C, in order to study its long-term thermal stability. The weight loss and dimensional changes were measured. Elemental analysis was also conducted in order to estimate the TriA-X degradation process. The TriA-X exhibited excellent thermal stability at 180 degrees C and a very small degree of degradation at 240 degrees C, with the degradation becoming significant at 270 degrees C. The latter was primarily dominated by the oxidation of a chain-extension moiety formed by the cure reaction of the end-cap PEPA.
  2018年04月, 研究論文（学術雑誌）, 共同, 30, 3, 0954-0083, DOI(公開)(r-map), 347, 354
• Long-term thermal stability of addition-type polyimide resins derived from pyromellitic dianhydride, 2-phenyl-4,4’-diaminodiphenyl ether, and 4-phenylethynylphtalic anhydride
  Y. Kubota, T. Furuta, Y. Ishida, R. Yokota, M. Miyauchi, T. Aoki, T. Ogasawara
  High Performance Polymer
  2018年04月, 研究論文（学術雑誌）, 共同, 30, 3, 347, 354
• Oxidation behavior of monolithic HfSi2 and SiC fiber-reinforced composites fabricated by melt infiltration using Si-8.5 at% Hf alloy at 800-1200 degrees C in dry air
  Tsunoura, Toru; Okubo, Yosuke; Yoshida, Katsumi; Yano, Toyohiko; Aoki, Takuya; Ogasawara, Toshio
  JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
  CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI
  The low-temperature melt-infiltration method using eutectic Si alloys is a novel process of fabricating SiC fiber-reinforced SiC-based matrix composites (SiCf/SiCs) for high-temperature structural applications. SiCf/SiCs were fabricated by the melt-infiltration method using a eutectic Si-8.5 at% Hf alloy to evaluate their dry oxidation behavior at 800-1200 degrees C for times ranging from 10-100 h. The oxidation behavior of monolithic HfSi2 (Monolith) fabricated by spark plasma sintering was also evaluated in dry air. The oxidation behavior of the composite matrix and Monolith obeyed the parabolic law in dry conditions. The steps to form the oxidation layer were expected to produce HfO2 and Si, followed by SiO2, and, finally, HfSiO4. The oxidation rate of the matrix was similar to that of Monolith and 10(2)-10(4) times larger than that of Si. The oxidation activation energy employed in oxidation of HfSi2 was calculated as 258 kJ/mol in dry air. (C) 2018 The Ceramic Society of Japan. All rights reserved.
  2018年01月, 研究論文（学術雑誌）, 共同, 126, 1, 1882-0743, DOI(公開)(r-map), 27, 33
• Oxidation behavior of monolithic HfSi2 and SiC fiberreinforced composites fabricated by melt infiltration using　Si-8.5at%Hf alloy at 800-1200°C in dry air
  T. Tsunoura, Y. Okubo, K. Yoshida, T. Yano, T. Aoki, T. Ogasawara
  Journal of Ceramic Society of Japan
  2018年01月, 研究論文（学術雑誌）, 共同, 126, 1, 27, 33
• Development of large-movements and high-force electrothermal bimorph actuators based on aligned carbon nanotube reinforced epoxy composites
  Shirasu, Keiichi; Yamamoto, Go; Inoue, Yoku; Ogasawara, Toshio; Shimamura, Yoshinobu; Hashida, Toshiyuki
  SENSORS AND ACTUATORS A-PHYSICAL
  ELSEVIER SCIENCE SA
  By using aligned multi-walled carbon nanotube (MWCNT) reinforced epoxy composites possessing a negative coefficient of thermal expansion (CTE) as well as high Young's modulus and aluminum foils, novel electrothermal bimorph actuators are fabricated. U-shaped bimorph actuators are formed by cutting out the middle part of the composite/aluminum laminates, where the MWCNT-aligned direction is parallel to the length direction of the U-shaped bimorph actuators. We demonstrate that the bimorph actuators with a free length of 16 mm show a large bending displacement and force output, and their values are 7.6-10.0 mm and 0.8-7.8 mN under a DC voltage of 5.2-6.0 V. Based on these results, the bending displacement and force output of the bimorph actuator are modeled by combining strength-of-materials theories and rule of mixtures (Voigt model and Turner's model). By using these models, we indicate contributions from two sources toward the increased bending displacement and force output in the bimorph actuator: (i) designing the Young's modulus and negative CTE of the composite layer by controlling the MWCNT volume fraction and the dimensional parameters (especially thickness) of the bimorph actuator; (ii) selecting materials having a high Young's modulus as well as a large CTE as the second layer. (C) 2017 Elsevier B.V. All rights reserved.
  2017年11月, 研究論文（学術雑誌）, 共同, 267, 0924-4247, DOI(公開)(r-map), 455, 463
• Nonablative lightweight thermal protection system for Mars Aeroflyby Sample collection mission
  Suzuki, Toshiyuki; Aoki, Takuya; Ogasawara, Toshio; Fujita, Kazuhisa
  ACTA ASTRONAUTICA
  PERGAMON-ELSEVIER SCIENCE LTD
  In this study, the concept of a nonablative lightweight thermal protection system (NALT) were proposed for a Mars exploration mission currently under investigation in Japan. The NALT consists of a carbon/carbon (C/C) composite skin, insulator tiles, and a honeycomb sandwich panel. Basic thermal characteristics of the NALT were obtained by conducting heating tests in high-enthalpy facilities. Thermal conductivity values of the insulator tiles as well as the emissivity values of the C/C skin were measured to develop a numerical analysis code for predicting NALT's thermal performance in flight environments. Finally, a breadboard model of a 600 mm diameter NALT aeroshell was developed and qualified through vibration and thermal vacuum tests.
  2017年07月, 研究論文（学術雑誌）, 共同, 136, 0094-5765, DOI(公開)(r-map), 407, 420
• Mechanical properties of cross-ply and quasi-isotropic composite laminates processed using aligned multi-walled carbon nanotube/epoxy prepreg
  Ogasawara, Toshio; Hanamitsu, Satoru; Ogawa, Takeshi; Moon, Sook-Young; Shimamura, Yoshinobu; Inoue, Yoku
  ADVANCED COMPOSITE MATERIALS
  TAYLOR & FRANCIS LTD
  This study examined the processing and mechanical properties of cross-ply and quasi-isotropic composite laminates processed using aligned multi-walled carbon nanotube/epoxy prepreg sheets. Three kinds of CNT/epoxy laminates, ([0 degrees/9 degrees]s, [60 degrees/0 degrees/-60 degrees]s, [0 degrees/45 degrees/90 degrees/-45 degrees]s) were successfully fabricated using aligned CNT/epoxy prepreg sheets. The CNT volume fraction was approximately 10%. No visible void or delamination was observed in composite laminates, and the thickness of each layer was almost equal to that of the prepreg. To evaluate the elastic moduli, E-11, E-22, and G(12), of each ply in the laminates, on -axis and off -axis tensile tests (0 degrees, 45 degrees, 90 degrees) were conducted of aligned CNT/epoxy lamina specimens. The Young's modulus of CNT/epoxy cross-ply and quasi-isotropic laminates agreed with the theoretical values, which were calculated using classical laminate theory and elastic moduli of CNT/epoxy lamina. The respective failure strains of [0 degrees/90 degrees]s, [60 degrees/0 degrees/-60 degrees]s, and [0 degrees/45 degrees/90 degrees/-45 degrees]s laminates are 0.65, 0.92, 0.63%, which are higher than that of 0 degrees composite lamina (0.5%). Results suggest that the failure strain of 0 degrees layer in composite laminates is improved because of the other layers.
  2017年04月, 研究論文（学術雑誌）, 共同, 26, 2, 0924-3046, DOI(公開)(r-map), 157, 168
• Potential use of CNTs for production of zero thermal expansion coefficient composite materials: An experimental evaluation of axial thermal expansion coefficient of CNTs using a combination of thermal expansion and uniaxial tensile tests
  Shirasu, Keiichi; Nakamura, Akihiro; Yamamoto, Go; Ogasawara, Toshio; Shimamura, Yoshinobu; Inoue, Yoku; Hashida, Toshiyuki
  COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
  ELSEVIER SCI LTD
  Feasibility of using multi-walled carbon nanotubes (MWCNTs) for the control of coefficients of thermal expansion (CTEs) of composite materials was evaluated, based on experimental data of CTEs and Young's modulus newly obtained using a combined testing procedure. The axial CTE of the MWCNTs were evaluated over the temperature range -5 degrees C to 85 degrees C by using the MWCNT's Young's modulus and CTE of the aligned MWCNT reinforced epoxy composites in Turner's model. The Young's moduli of the MWCNTs were calculated by using Voigt model and the composite Young's modulus measured by tensile tests. The MWCNTs were shown to possess negative CTEs, and the nanotube CTEs tended to become less negative with increasing temperature. Owing to their large Young's modulus, aspect ratio and negative CTEs, the use of MWCNTs aligned axially was shown to be effective at controlling the CTE of polymer composites at lower volume fractions compared to conventional negative CTE materials. (C) 2016 Elsevier Ltd. All rights reserved.
  2017年04月, 研究論文（学術雑誌）, 共同, 95, 1359-835X, DOI(公開)(r-map), 152, 160
• Local out-of-plane deformation of CFRP ablator subjected to rapid heating
  Koyanagi, Jun; Fukuda, Yasuhiro; Yoneyama, Satoru; Hirai, Ken-ichi; Yoshimura, Akinori; Aoki, Takuya; Ogasawara, Toshio
  ADVANCED COMPOSITE MATERIALS
  TAYLOR & FRANCIS LTD
  This study investigates local out-of-plane deformation of a carbon fiber reinforced phenolic polymer ablator subjected to very rapid heating. Local out-of-plane deformation was measured using a three-dimensional digital image correlation technique at high temperatures. This was achieved by attaching high temperature resistant random patterns on the specimen surface using a ceramic bond. Additionally, blue filters intended for cutting strong infrared radiation from the specimen were also used. This study then discusses the mechanisms of the local out-of-plane deformation under rapid heating conditions in terms of carbonization, pyrolysis gas occurrence, gas pressure storage, and interlaminar debonding due to gas pressure.
  2017年02月, 研究論文（学術雑誌）, 共同, 26, 1, 0924-3046, DOI(公開)(r-map), 23, 34
• マイクロドロップレット試験を用いたカーボン繊維強化耐熱高分子基複合材料の界面強度評価
  佐藤光桜、今井えりな、小柳潤、石田雄一、小笠原俊夫
  日本複合材料学会誌
  2017年01月, 研究論文（学術雑誌）, 共同, 43, 1, pp.33, 39
• Evaluation of the interfacial strength of carbon-fiber-reinforced temperature-resistant polymer composites by the micro-droplet test
  Sato, Mio; Imai, Erina; Koyanagi, Jun; Ishida, Yuichi; Ogasawara, Toshio
  ADVANCED COMPOSITE MATERIALS
  TAYLOR & FRANCIS LTD
  This paper presents an evaluation method for the fiber/matrix interfacial strength. The interfacial strength is determined by comparing experimental data with numerical simulations. The micro-droplet test is conducted, and the fiber axial stress at the point of interface debonding is obtained. A numerical simulation is performed with ABAQUS using an axisymmetric finite-element model. In the numerical simulation, an accurate value of the thermal residual stress based on the thermo-viscoelasticity and the damage to the resin around the blade-contacting point is considered to simulate the experimental phenomena ideally. In the thermal residual stress analysis, the actual thermal residual stress is calculated by considering the relaxation modulus and the time-temperature superposition principle for the resin. Damage initiation criteria for both dilatational and shear cases, based on continuum damage mechanics, are considered for the resin. Interfacial debonding is simulated using a cohesive zone model, and the interfacial strength is taken as the strength of the cohesive zone element at the simulated fiber maximum stress corresponding to the experimental value.
  2017年, 研究論文（学術雑誌）, 共同, 26, 5, 0924-3046, DOI(公開)(r-map), 465, 476
• 多層カーボンナノチューブにおける軸方向線膨張係数の温度依存性に関する研究 （配向カーボンナノチューブ/エポキシ複合材料の線膨張測定に基づく手法）
  白須 圭一、中村 彰宏、山本 剛、小笠原 俊夫、島村 佳伸、井上 翼、橋田 俊之
  日本機械学会論文集
  2016年12月, 研究論文（学術雑誌）, 共同, 82, 844, DOI(公開)(r-map), 16, 00228
• A simple test method, NAL-II, to evaluate the strength and elastic modulus of polymer matrix composite laminates
  T. Ogasawara, T. Ishikawa
  Advanced Composite Materials
  2016年12月, 研究論文（学術雑誌）, 共同, 25, S1, 131, 145
• Three-dimensional porous graphene-based ultra-lightweight aerofoam exhibiting good thermal insulation
  Woo Sik Kim, Sook Young Moon, Jun Koyanagi, Toshio Ogasawara
  Advanced Composite Materials
  2016年12月, 研究論文（学術雑誌）, 共同, 25, S1, 105, 113
• PANI導電性熱硬化樹脂CFRPの雷撃損傷低減効果
  平野義鎭、横関智弘、後藤晃哉、高橋辰宏、銭丹娜、伊藤昌次、石田雄一、小笠原俊夫、石橋勝
  日本航空宇宙学会論文集
  2016年08月, 研究論文（学術雑誌）, 共同, 64, 4, 223, 228
• 配向カーボンナノチューブ複合材料の最近の進歩
  小笠原俊夫
  非破壊検査
  2016年07月, （MISC）総説・解説（学術雑誌）, 単独, 65, 7, 309, 315
• CFRP アブレータの急速加熱時に生じる局所面外変形
  小柳 潤, 福田 泰大, 米山 聡, 平井 研一, 吉村 彰記, 青木 卓哉, 小笠原 俊夫
  日本複合材料学会誌
  2016年07月, 研究論文（学術雑誌）, 共同, 　42, 4, 146, 152
• Lightning damage suppression in a carbon fiber-reinforced polymer with a polyaniline-based conductive thermoset matrix
  Y. Hirano, T. Yokozeki, Y. Ishida, T. Goto, T. Takahashi, Danna Qian, S. Ito, T. Ogasawara, M. Ishibashi
  Composites Science and Technology
  2016年04月, 研究論文（学術雑誌）, 共同, 127, 1, 7
• 多孔質炭素材料を用いた軽量アブレータの創製
  久保田 勇希, 佐々木 駿, 向後 保雄, 青木 卓哉, 小笠原 俊夫, 石田 雄一, 山田 哲哉
  日本航空宇宙学会論文集
  2016年04月, 研究論文（学術雑誌）, 共同, 64, 2, 104, 112
• X-ray computed tomography used to measure fiber orientation in CFRP laminates
  A. Yoshimura, R. Hosoya, J. Koyanagi, T. Ogasawara
  Advanced Composite Materials
  2016年01月, 研究論文（学術雑誌）, 共同, 25, 1, 19, 30
• Negative axial thermal expansion coefficient of carbon nanotubes: Experimental determination based on measurements of coefficient of thermal expansion for aligned carbon nanotube reinforced epoxy composites
  K. Shirasu, G. Yamamoto, I. Tamaki, T. Ogasawara, Y. Shimamura, Y. Inoue, T. Hashida
  Carbon
  2015年12月, 研究論文（学術雑誌）, 共同, 95, 904, 909
• Tyranno ZMI fiber/ TiSi2-Si matrix composites for high- temperature structural applications
  T. Aoki, T. Ogasawara
  Composites: Part A
  2015年09月, 研究論文（学術雑誌）, 共同, 76, DOI(公開)(r-map), 102, 109
• Development and characterization of CFRP using a polyaniline-based conductive thermoset matrix
  T. Yokozeki, T. Goto, T. Takahashi, D. Qian, S. Itou, Y. Hirano, Y. Ishida, M. Ishibashi, T. Ogasawara,
  Composites Science and Technology
  2015年09月, 研究論文（学術雑誌）, 共同, 117, 277, 281
• Efficient and Simple Surface Modification of Carbon Nanotubes by Dry Process Using hydrogen
  S-Y. Moon, T. Ogasawara, S. Hanamitsu, K. Shioda, Y. Inoue
  Advanced Engineering Materials
  2015年08月, 研究論文（学術雑誌）, 共同, 17, 8, 1220, 1225
• Mechanical properties of unidirectional and crossply SiC-f/SiC composites using SiC fibers with carbon interphase formed by electrophoretic deposition process
  K. Yoshida, H. Akimoto, T. Yano, M. Kotani, T. Ogasawawra
  Progress in Nuclear Energy
  2015年07月, 研究論文（学術雑誌）, 共同, 82, 148, 152
• 模擬雷撃を受ける CFRP 積層板損傷挙動の解析的検討
  野呂田竜史、平野　義鎭、松崎　亮介、小笠原俊夫
  日本複合材料学会誌
  2015年05月, 研究論文（学術雑誌）, 共同, 41, 149, 158
• Damage monitoring of polymer-lined carbon fibre-reinforced plastic using small-diameter fibre Bragg grating sensors
  Takeda, Shin-ichi; Yokozeki, Tomohiro; Ogasawara, Toshio
  Journal of Reinforced Plastics and Composites
  2015年03月, 研究論文（学術雑誌）, 共同, 34, 6, 454, 462
• Stress transfer efficiency in aligned multi-wall carbon nanotubes sheet / epoxy composites
  T. Tsuda, T. Ogasawara, S-Y Moon, K. Nakamoto, N. Takeda, Y. Shimamura, Y. Inoue
  Composites: Part A
  2014年12月, 研究論文（学術雑誌）, 共同, 67, 16–21
• Fabrication and properties of Si-Hf alloy melt-infiltrated Tyranno ZMI fiber/Sic-based matrix composites
  T. Aoki, T. Ogasawara, Y. Okubo, K. Yoshida, T. Yano
  Composites: Part A
  2014年11月, 研究論文（学術雑誌）, 共同, 66, 155, 162
• Three dimensional orientation angle distribution counting and calculation for the mechanical properties of aligned carbon nanotube/epoxy composites
  T. Tsuda, T. Ogasawara, S-Y Moon, K. Nakamoto, N. Takeda, Y. Shimamura, Y. Inoue
  Composites: Part A
  2014年10月, 研究論文（学術雑誌）, 共同, 65, 1, 9
• 配向カーボンナノチューブ/エポキシ複合材料の力学特性に及ぼすプリプレグへの予ひずみ付与の影響
  津田皓正、仲本兼悟、小笠原俊夫、文淑英、武田展雄、小川武史、島村佳伸、井上翼
  日本複合材料学会誌
  2014年09月, 研究論文（学術雑誌）, 共同, 40, 5, 209, 220
• Tensile mechanical properties of carbon nanotube/epoxy composite fabricated by pultrusion of carbon nanotube spun yarn preform
  Y. Shimamura, K. Oshima, K. Tohgo, T. Fujii, K. Shirasu, G. Yamamoto, T. Hashida, K. Goto, T. Ogasawara, K. Naito, T. Nakano, Y. Inoue
  Composites: Part A
  2014年07月, 研究論文（学術雑誌）, 共同, 62, 32–38
• X線CT画像を用いたCFRP積層板の繊維方向測定
  吉村彰記、細谷亮平、小柳潤、小笠原俊夫
  日本複合材料学会誌
  2014年07月, 研究論文（学術雑誌）, 共同, 40, 4
• Titanium alloy foil-inserted carbon fiber / epoxy composites for cryogenic propellant tank application, Advanced Composite Materials
  T. Ogasawara, N. Arai, R. Fukumoto, T. Ogawa, T. Yokozeki, A. Yoshimura
  Advanced Composite Materials
  2014年03月, 研究論文（学術雑誌）, 共同, 23, 2, 129, 149
• Nanoscopic observations for evaluating the failure process of aligned multi-walled carbon nanotube / epoxy composites
  T. Tsuda, T. Ogasawara, S-Y Moon, K. Nakamoto, N. Takeda, Y. Shimamura, Y. Inoue
  Composite Science and Technology
  2013年11月, 研究論文（学術雑誌）, 共同, 88, 48–56
• 配向カーボンナノチューブ/エポキシ複合材料の力学特性
  小笠原俊夫、仲本兼悟、津田皓正、小川武史、文淑英、島村佳伸、井上翼
  日本複合材料学会誌
  2013年11月, 研究論文（学術雑誌）, 共同, 39, 6, 240, 247
• Fatigue behavior and lifetime distribution of impact-damaged carbon fiber/toughened epoxy composites under compressive loading
  T. Ogasawara, S. Sugimoto, H. Katoh, T. Ishikawa
  Advanced Composite Materials
  2013年03月, 研究論文（学術雑誌）, 共同, 22, 2, 65, 78
• Synthesis and characterization of soluble phenylethynyl-terminated imide oligomers derived from pyromellitic dianhydride and 2-phenyl-4,4′-diaminodiphenyl ether
  M. Miyauchi, Y. Ishida, T. Ogasawara, R. Yokota
  Reactive and Functional Polymers
  2013年02月, 研究論文（学術雑誌）, 共同, 73, 2, 340–345
• Comparison of out-of-plane tensile strengths of aligned CFRP obtained by 3-point bending and direct loading tests
  E. Hara, T. Yokozeki, H. Hatta, Y. Iwahori, T. Ogasawara, T. Ishikawa
  Composites: Part A
  2012年11月, 研究論文（学術雑誌）, 共同, 43, 1828–1836
• Novel phenylethynyl- terminated PMDA-type polyimides based on KAPTON backbone structures derived from 2-phenyl-4,4′-diaminodiphenyl ether
  M. Miyauchi, Y. Ishida, T. Ogasawara, R. Yokota
  Polymer Journal
  2012年09月, 研究論文（学術雑誌）, 共同, 44, DOI(公開)(r-map), 959, 965
• Interfacial control of uni-directional SiCf/SiC composites based on electrophoretic deposition and their mechanical properties
  K. Yoshida, A. Aoyagi, H. Akimoto, T. Yano, M. Kotani, T. Ogasawara
  Composites Science and Technology
  2012年08月, 研究論文（学術雑誌）, 共同, 72, 1665–1670
• Interlaminar fracture toughness of 5 harness satin woven fabric carbon fiber / epoxy composites
  T. Ogasawara, A. Yoshimura, T. Ishikawa, R. Takahashi, N. Sasaki, T. Ogawa
  Advanced Composite Materials
  2012年01月, 研究論文（学術雑誌）, 共同, 21, 1, DOI(公開)(r-map), 45, 56
• Mechanical properties of aligned multi-walled carbon nanotube / epoxy composites processed using a hot-melt prepreg method
  T. Ogasawara, S-Y. Moon, Y. Inoue, Y. Shimamura
  Composite Science and Technology
  2011年11月, 研究論文（学術雑誌）, 共同, 71, DOI(公開)(r-map), 1826, 1833
• 柔軟体衝突を受けるCFRP積層板の損傷解析
  駒形大輔、岡部朋永、矢代茂樹、吉村彰記、小笠原俊夫
  日本複合材料学会誌
  2011年09月, 研究論文（学術雑誌）, 共同, 37, 5, 164, 171
• 極低温環境下におけるCFRP接着接合のモードII破壊靱性
  吉村彰記、野路陽平、小笠原俊夫、横関智弘、荻原慎二
  日本複合材料学会誌
  2011年07月, 研究論文（学術雑誌）, 共同, 37, 4, 130, 137
• Direct measurements of interfacial shear strength of multi-walled carbon nanotube/PEEK composite using a nano-pullout method
  T. Tsuda, T. Ogasawara, F. Deng, N. Takeda
  Composite Science and Technology
  2011年07月, 研究論文（学術雑誌）, 共同, 71, DOI(公開)(r-map), 1295, 1300
• Ablation behavior of SiC fiber / carbon matrix composites under simulated atmospheric reentry conditions
  T. Ogasawara, T. Aoki, M. S. Aly-Hassan, Y. Mizokami, N. Watanabe
  Composites: Part A
  2011年03月, 研究論文（学術雑誌）, 共同, 42, 221–228
• High temperature tensile properties of 2D cross-ply carbon-cabon composites
  S. Dhakate, T. Aoki, T. Ogasawara
  Adv. Mat. Lett.
  2011年02月, 研究論文（学術雑誌）, 共同, 2, 2, 106, 112
• Stress–strain behavior of multi-walled carbon nanotube / PEEK composites
  T. Ogasawara, T. Tsuda, N. Takeda
  Composite Science and Technology
  2011年01月, 研究論文（学術雑誌）, 共同, 71, 73, 78
• Three-dimensional measurement of CFRP deformation during high-speed impact loading
  M. Yamada, Y. Tanabe, A. Yoshimura, T. Ogasawara
  Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
  2011年01月, 研究論文（学術雑誌）, 共同, 646, 1, 219, 226
• Coupled thermal–electrical analysis for carbon fiber/epoxy composites exposed to simulated lightning current
  T. Ogasawara, Y. Hirano, A. Yoshimura
  Composites: Part A
  2010年08月, 研究論文（学術雑誌）, 共同, 41, 973–981
• Damage characterization in thin-ply composite laminates under out-of-plane transverse loadings
  T. Yokozeki, A. Kuroda, A. Yoshimura, T. Ogasawara, T. Aoki
  Composite Structures
  2010年07月, 研究論文（学術雑誌）, 共同, 93, DOI(公開)(r-map), 49–57
• Experimental characterization of high-speed impact damage behavior in a three-dimensionally woven SiC/SiC composite
  K. Ogi, T. Okabe, M. Takahashi, S. Yashiro, A. Yoshimura, T. Ogasawara
  Composites: Part A
  2010年04月, 研究論文（学術雑誌）, 共同, 41, 489–498
• CFRP積層板の簡便な圧縮試験法の提案
  小笠原俊夫、石川隆司
  日本複合材料学会誌
  2010年03月, 研究論文（学術雑誌）, 共同, 36, 2, 33, 40
• Torsion fatigue behavior of unidirectional carbon/epoxy and glass/epoxy composites
  T. Ogasawara, K. Onta, S. Ogihara, T. Yokozeki, E. Hara
  Composite Structures
  2009年10月, 研究論文（学術雑誌）, 共同, 90, 482–489
• Mechanical properties of carbon fiber / fullerene-dispersed epoxy composites
  T. Ogasawara, Y. Ishida, T. Kasai
  Composites Science and Technology
  2009年09月, 研究論文（学術雑誌）, 共同, 69, DOI(公開)(r-map), 2002–2007
• Experimental evaluation of gas permeability through damaged composite laminates for cryogenic tank
  T. Yokozeki, T. Ogasawara, T. Aoki, T. Ishikawa
  Composites Science and Technology
  2009年07月, 研究論文（学術雑誌）, 共同, 69, DOI(公開)(r-map), 1334–1340
• 模擬雷撃を受ける炭素繊維複合材料の熱―電気連成解析
  小笠原俊夫、平野義鎮、吉村彰記
  日本航空宇宙学会論文集
  2009年07月, 研究論文（学術雑誌）, 共同, 57, 336, 343
• 薄層化によるCFRP積層板の耐漏洩特性の向上
  横関智弘、高木智宏、吉村彰記、小笠原俊夫、荻原慎二
  日本航空宇宙学会論文集
  2008年10月, 研究論文（学術雑誌）, 共同, 56, 657, 492, 497
• カーボンナノチューブ複合材料における剛性低下要因の理論的評価
  小野裕、青木隆平、小笠原俊夫
  日本複合材料学会誌
  2008年05月, 研究論文（学術雑誌）, 共同, 34, 109, 117
• Correction method for evaluation of interfacial fracture toughness of DCB, ENF and MMB specimens with residual thermal stresses
  T. Yokozeki, T. Ogasawara, T. Aoki
  Composites Science and Technology
  2008年03月, 研究論文（学術雑誌）, 共同, 68, 760, 767
• Experimental characterization of strength and damage resistance properties of thin-ply carbon fiber/toughened epoxy laminates
  T. Yokozeki, Y. Aoki, T. Ogasawara
  Composite Structures
  2008年02月, 研究論文（学術雑誌）, 共同, 82, 382, 389
• Evaluation of Compressive Nonlinear Response of Unidirectional Carbon Fiber Reinforced Composites using a Modified Sandwich Beam Specimen in Flexure
  T. Yokozeki, T. Ogasawara, T. Ishikawa
  Journal of Reinforced Plastics and Composites
  2008年01月, 研究論文（学術雑誌）, 共同, 27, 1, DOI(公開)(r-map), 5, 17
• 極低温タンク構造への適用に向けた樹脂フィルム付きCFRP積層板の損傷挙動に関する研究
  横関智弘、山形尚司、小笠原俊夫
  日本複合材料学会誌
  2008年01月, 研究論文（学術雑誌）, 共同, 34, 3, 13
• Evaluating the orientation and dispersion of carbon nanotubes inside nanocomposites by a focused-ion-beam technique
  F. Deng, T. Ogasawara, N. Takeda
  Materials Letters
  2007年12月, 研究論文（学術雑誌）, 共同, 61, DOI(公開)(r-map), 5095, 5097
• Linear and nonlinear torsional behavior of unidirectional CFRP and GFRP
  T. Ogasawara, T. Yokozeki, K. Onta and S. Ogihara
  Composites Science and Technology
  2007年12月, 研究論文（学術雑誌）, 共同, 67, DOI(公開)(r-map), 3457, 3464
• Tensile properties at different temperature and observation of micro deformation of carbon nanotubes-poly(ether ether ketone) composites
  F. Deng, T. Ogasawara, N. Takeda
  Composites Science and Technology
  2007年11月, 研究論文（学術雑誌）, 共同, 67, DOI(公開)(r-map), 2959, 2964
• 薄厚層を有する高靱性CFRP積層板の面外衝撃損傷挙動及びCAI特性
  横関智弘、青木雄一郎、小笠原俊夫
  日本航空宇宙学会論文集
  2007年06月, 研究論文（学術雑誌）, 共同, 55
• Sensitive strain monitoring of SiC fiber / epoxy composite using electrical resistance changes
  T. Ogasawara, S. Aizawa, T. Ogawa
  Composites Science and Technology
  2007年05月, 研究論文（学術雑誌）, 共同, 67, 955, 962
• 熱残留応力を考慮したDCB試験による接着破壊靱性評価法
  横関智弘、小笠原俊夫
  日本複合材料学会誌
  2007年05月, 研究論文（学術雑誌）, 共同, 33, 219, 226
• Processing and properties of carbon fiber / Triple-A polyimide composites fabricated from imide oligomer dry prepreg
  T. Ogasawara, Y. Ishida, R. Yokota, T. Watanabe, T. Aoi, and J. Goto
  Composites: Part A
  2007年05月, 研究論文（学術雑誌）, 共同, 38, DOI(公開)(r-map), 1296, 1303
• 一方向CFRPおよびGFRPのねじり挙動
  隠田敬二、小笠原俊夫、荻原慎二、横関智弘
  日本複合材料学会誌
  2007年03月, 研究論文（学術雑誌）, 共同, 33, 48, 54
• Measurements of fiber bundle interfacial properties of three-dimensionally reinforced carbon/carbon composites up to 2273 K
  T. Aoki, Y. Yamane, T. Ogasawara, T. Ogawa, S. Sugimoto and T. Ishikawa
  Carbon
  2007年02月, 研究論文（学術雑誌）, 共同, 45, DOI(公開)(r-map), 459, 467
• Simple constitutive model for nonlinear response of fiber-reinforced composites with loading-directional dependence
  T. Yokozeki, S. Ogihara, S. Yoshida, T. Ogasawara
  Composites Science and Technology
  2007年01月, 研究論文（学術雑誌）, 共同, 67, 1, DOI(公開)(r-map), 111, 118
• Helium gas permeability of montmorillonite/epoxy nanocomposites
  T. Ogasawara, Y. Ishida, T. Ishikawa, T. Aoki, and T. Ogura
  Composites: Part A
  2006年12月, 研究論文（学術雑誌）, 共同, 37, 2236, 2240
• Evaluation of gas leakage through composite laminates with multilayer matrix cracks: Cracking angle effects
  T. Yokozeki, T. Ogasawara, T. Ishikawa,
  Composites Science and Technology
  2006年12月, 研究論文（学術雑誌）, 共同, 66, 12, 2815, 2824
• Mechanical properties of corrugated composites for candidate materials of flexible wing structures
  T. Yokozeki, S.Takeda, T. Ogasawara, T. Ishikawa
  Composites: Part A
  2006年10月, 研究論文（学術雑誌）, 共同, 37, 1578, 1586
• Development of highly soluble addition-type imide oligomers for matrix of carbon fiber composite (I): Imide oligomers based on asymmetric biphenyltetracarboxylic dianhydride and 9,9-bis(4-aminophenyl) fluorine
  Y. Ishida, T. Ogasawara, R. Yokota
  High Performance Polymers
  2006年10月, 研究論文（学術雑誌）, 共同, 18, 727, 737
• Optimization of liquid molding cycle for a phenylethynyl terminated polyimide composite
  K. Wang, T. Ogasawara, and Y. Ishida
  Journal of Reinforce Plastics and Composites
  2006年04月, 研究論文（学術雑誌）, 共同, 25, 4, DOI(公開)(r-map), 361, 377
• Potential strength of Nicalon, Hi-Nicalon, and Hi-Nicalon Type S monofilaments of variable diameters
  T. Morimoto, T. Ogasawara
  Composites: Part A
  2006年03月, 研究論文（学術雑誌）, 共同, 37, 405, 412
• Characterization of fullerene / TriA-PI composites
  Y. Shinoda, I. Shiota, Y. Ishida, T. Ogasawara, R. Yokota
  Advances in Science and Technology
  2006年02月, 研究論文（学術雑誌）, 共同, 51, 75, 80
• Influence of oxidation on the micro-mechanical properties of a 3-D woven SiC/SiC composite tested in air at 1100°C
  I. J. Davies, S. Sieng, T. Ogasawara, T. Ishikawa
  Ceramic Transactions
  2006年02月, 研究論文（学術雑誌）, 共同, 192, 175, 186
• Effect of on-axis loading on shear properties of an orthogonal 3D woven SiC/SiC composite
  T. Ogasawara, T. Ishikawa, T. Yokozeki, T. Shiraishi, N. Watanabe
  Composites Science and Technology
  2005年12月, 研究論文（学術雑誌）, 共同, 65, 2541, 2549
• Effects of fiber nonlinear properties on the compressive strength prediction of unidirectional carbon–fiber composites
  T. Yokozeki, T. Ogasawara, T. Ishikawa
  Composites Science and Technology
  2005年11月, 研究論文（学術雑誌）, 共同, 65, 2140, 2147
• Transient creep behavior of a plain woven SiC fiber / SiC matrix composite
  T. Bessyo, T. Ogasawara, T. Aoki, T. Ishikawa, Y. Ochi
  JSME International Journal, Series A
  2005年10月, 研究論文（学術雑誌）, 共同, 48, 210, 214
• Effects of layup angle and ply thickness on matrix crack interaction in contiguous plies of composite laminates
  T. Yokozeki, T. Aoki, T. Ogasawara, T. Ishikawa
  Composites: Part A
  2005年09月, 研究論文（学術雑誌）, 共同, 36, 1229, 1235
• 可とう翼材料としての炭素繊維平織コルゲート材の力学特性
  横関智弘、武田真一、小笠原俊夫、石川隆司
  日本複合材料学会誌
  2005年05月, 研究論文（学術雑誌）, 共同, 31, 268, 273
• Distribution of fibre pullout length and interface shear strength within a single fibre bundle for an orthogonal 3-D woven Si-Ti-C-O fibre / Si-Ti-C-O matrix composite tested at 1100oC in air
  I. J. Davies, T. Ogasawara, T. Ishikawa
  J. Euro. Ceram. Soc.
  2005年02月, 研究論文（学術雑誌）, 共同, 25, 599, 604
• Low cycle fatigue behavior in an orthogonal three-dimensional woven Tyranno fiber reinforced Si-Ti-C-O matrix composite
  S. Zhu, Y. Kaneko, Y. Ochi, T. Ogasawara, T. Ishikawa
  International Journal of Fatigue
  2004年10月, 研究論文（学術雑誌）, 共同, 26, 1069, 1074
• Microstructure of Tyranno ZMI fiber reinforced carbon matrix composites after partial oxidation at different temperature
  S. R. Dhakate, T. Ogasawawara, T. Aoki
  Trans. MRS Japan
  2004年08月, 研究論文（学術雑誌）, 共同, 29, 8, 3585, 3589
• Effect of silicon infiltration on the mechanical properties of 2D cross-ply carbon-carbon composites
  S. R. Dhakate, T. Aoki, T. Ogasawara
  Carbon Science
  2004年03月, 研究論文（学術雑誌）, 共同, 5, 3, 108, 112
• Characterization of Multi-walled Carbon Nanotube / Phenylethynyl Terminated Polyimide Composites
  T. Ogasawara, Yuichi Ishida, Takashi Ishikawa, and Rikio Yokota
  Composite: Part A
  2004年02月, 研究論文（学術雑誌）, 共同, 34, 67, 74
• 炭化ケイ素繊維/エポキシ複合材料の電気抵抗変化によるひずみモニタリング
  相澤志文、小笠原俊夫、小川武史
  日本複合材料学会誌
  2004年01月, 研究論文（学術雑誌）, 共同, 40, 1, 33, 40
• Properties of vapor grown carbon nanofiber / phenylethynyl terminated polyimide composite
  T. Ogasawara, Y. Ishida, T. Ishikawa
  Advanced Composite Materials
  2004年01月, 研究論文（学術雑誌）, 共同, 13, 215, 226
• Processing and properties of carbon fiber reinforced Triple A polyimide (Tri-A PI) matrix composites
  T. Ogasawara, T. Ishikawa, R. Yokota, H. Ozawa, M. Taguchi, R. Sato, Y. Shigenari, and K. Miyagawa
  Advanced Composite Materials
  2003年10月, 研究論文（学術雑誌）, 共同, 11, 277, 286
• Thermal Response and Oxidation of Tyranno-Fiber- Reinforced Si-Ti-C-O Matrix Composites for Thermal Protection System in High Enthalpy Dissociated Air
  T. Ogasawara, T. Ishikawa, and T. Matsuzaki
  J. Amer. Ceram. Soc.
  2003年10月, 研究論文（学術雑誌）, 共同, 86, 830, 837
• 多層カーボンナノチューブ／熱硬化型ポリイミドTriA-PI複合材料
  小笠原俊夫、石川隆司、横田力男
  日本複合材料学会誌
  2003年07月, 研究論文（学術雑誌）, 共同, 29, 143, 149
• 肌焼鋼旋削時の超硬工具摩耗に及ぼす硬さの影響
  赤澤正久、小笠原俊夫、尾谷 敬造
  熱処理
  2003年06月, 研究論文（学術雑誌）, 共同, 43, 6, 409, 417
• Effects of normal stress on the off-axis mechanical behavior of a plain-woven C/C composite
  T. Aoki, T. Ogasawara, T. Ishikawa
  Advanced Composite Materials
  2003年06月, 研究論文（学術雑誌）, 共同, 12, 123, 138
• ねじり試験による直交三次元織物SiC繊維／SiC基複合材料のせん断弾性率特性
  白石卓也、小笠原俊夫、渡辺直行、石川隆司
  日本複合材料学会誌
  2003年05月, 研究論文（学術雑誌）, 共同, 39, 184, 192
• 3次元織物チラノ繊維強化SiC基複合材料の疲労挙動に及ぼす周波数の影響
  朱世杰、金子洋平、越智保雄、小笠原俊夫、石川隆司
  材料
  2002年11月, 研究論文（学術雑誌）, 共同, 51, 1400, 1404
• Tensile Creep Behavior and Thermal Stability of Orthogonal 3-D Woven Tyranno ZMI Fiber / Si-Ti-C-O Matrix Composites
  T. Ogasawara, T. Ishikawa, Y. Ohsawa, Y. Ochi, and S. Zhu
  J. Amer. Ceram. Soc.
  2002年03月, 研究論文（学術雑誌）, 共同, 85, 393, 400
• Thermal response and ablation characteristics of carbon fiber reinforced composite with novel silicon containing polymer MSP
  T. Ogasawara, T. Ishikawa, T. Yamada, R. Yokota, M. Itoh, and S. Nogi
  Journal of Composite Materials
  2002年02月, 研究論文（学術雑誌）, 共同, 36, 143, 157
• Fiber/matrix interface shear strength estimated from fiber pullout length data for Tyranno Si-Zr-C-O fiber composites with different SiC-based matrices and interfaces
  I. J. Davies, T. Ogasawara, and T. Ishikawa
  J. Mater. Sci. Letter
  2001年10月, 研究論文（学術雑誌）, 共同, 20, 2127, 2130
• Carbon fiber reinforced composites with newly developed silicon containing polymer MSP
  T. Ogasawara, T. Ishikawa, M. Itoh, T. Abe, R. Yokota, and M. Ando
  Advanced Composite Materials
  2001年09月, 研究論文（学術雑誌）, 共同, 10, 4, 319, 327
• Stress / Strain Behavior of a 3-D Woven Composite Based on the SiC/SiC System
  I. J. Davies, T. Ogasawara, and T. Ishikawa
  J. Ceram. Soc. Japan
  2001年07月, 研究論文（学術雑誌）, 共同, 109, 7, 643, 646
• Scanning electron microscopy study of failure in glass-sealed SiC/SiC-based composite (NUSK-CMC) creep tested at 1100 and 1200oC in air
  I. J. Davies, T. Ogasawara, and T. Ishikawa
  Advanced Composite Materials
  2001年07月, 研究論文（学術雑誌）, 共同, 10, 4, 357, 367
• Oxidation Behavior of Silicon-Infiltrated Carbon/Carbon Composites in High-Enthalpy Convective Environment
  T. Ogasawara, and T. Ishikawa
  J. Amer. Ceram. Soc.
  2001年07月, 研究論文（学術雑誌）, 共同, 84, 7, 1559, 64
• Multiple Cracking and Tensile Behavior for an Orthogonal 3-D Woven Si-Ti-C-O Fiber/Si-Ti-C-O Matrix Composite
  T. Ogasawara, T. Ishikawa, H. Ito, N. Watanabe, and I. J. Davies
  J. Amer. Ceram. Soc.
  2001年07月, 研究論文（学術雑誌）, 共同, 84, 7, 1565, 74
• Case Study of Failure in a Glass-Sealed SiC/SiC-Based Composite Creep Tested at 1100oC in Air
  I. J. Davies, T. Ogasawara, T. Ishikawa, and N. Suzuki
  Materials letters
  2001年05月, 研究論文（学術雑誌）, 共同, 48, 205, 209
• 交三次元織物Si-Ti-C-O繊維／Si-Ti-C-Oセラミックス基複合材料の損傷進展と非線型応力－歪み挙動
  伊藤宏、小笠原俊夫、渡辺直行、石川隆司
  日本複合材料学会誌
  2001年03月, 研究論文（学術雑誌）, 共同, 27, 2, 112, 123
• Application of TyrannoTM Fiber / Si-Ti-C-O Matrix Composite to the Thermal Protection Systems of the Japanese HOPE-X Space Vehicle
  T. Ogasawara and T. Ishikawa,
  Ceram. Eng. Sci. Proc.
  2001年03月, 研究論文（学術雑誌）, 共同, 22, 3, 23, 30.
• Tensile creep behavior of 3-D woven Si-Ti-C-O fiber / SiC based matrix composite with glass sealant
  T. Ogasawara, T. Ishikawa, N. Suzuki, I. J. Davies, M. Suzuki, J. Gotoh and T. Hirokawa,
  J. Mater. Sci.
  2000年05月, 研究論文（学術雑誌）, 共同, 35, 785, 793
• ３次元織物Si-Ti-C-O系セラミック複合材の高温気流中における耐熱性評価
  小笠原俊夫, 石川隆司，松崎貴至，渋谷昌樹，後藤淳
  J. Ceram. Soc. Japan,
  2000年01月, 研究論文（学術雑誌）, 共同, 108, 1, 80, 88
• Surface Analysis of Silicon Nitride Cutting Tool after Turning Gray Cast Iron
  T. Ogasawara, K. Otani, Y. Shichi and J. Yamanaka
  J. Ceram. Soc. Japan
  1999年06月, 研究論文（学術雑誌）, 共同, 107, 497, 501
• アクリル樹脂を含浸したバルブシート焼結材の切削性
  小笠原俊夫, 眞木邦雄, 尾谷敬造, 石橋章義
  日本機械学会論文集(Ｃ編)
  1997年10月, 研究論文（学術雑誌）, 共同, 63, 612, 2872, 2877
• 微小き裂を有する窒化ケイ素の破壊靭性と静的き裂進展
  小笠原俊夫, 広崎尚登, 秋宗淑雄, 安田榮一
  J. Ceram. Soc. Japan,
  1995年11月, 研究論文（学術雑誌）, 共同, 103, 11, pp 1063, 1068
• β型を原料とする窒化ケイ素焼結体の疲労挙動
  小笠原俊夫, 馬渕豊, 広崎尚登, 岡本裕介, 秋宗淑雄
  J. Ceram. Soc. Japan
  1995年07月, 研究論文（学術雑誌）, 共同, 103 [7], 7, 709, 712
• Damage behavior of silicon nitride for automotive gas turbine use when impacted by several types of spherical particles
  Y. Akimune, T. Akiba and T. Ogasawara,
  J.Mater.Sci.,
  1995年04月, 研究論文（学術雑誌）, 共同, 30, pp 1000, 1004.
• Threshold stress intensity for oxidative crack healing in sintered silicon nitride
  T. Ogasawara, T. Hori and A. Okada
  J. Mater. Sci. Letter
  1994年04月, 研究論文（学術雑誌）, 共同, 13, pp 404, 406
• Statistical Analysis of the Fatigue Life Distribution of Monolithic Silicon Nitride
  T. Ogasawara, N. Hirosaki and Y. Akimune
  J. Amer. Ceram. Soc.
  1994年02月, 研究論文（学術雑誌）, 共同, 77, 2, pp 514, 518
• 長いき裂を有する窒化ケイ素の疲労き裂進展挙動
  小笠原俊夫,安田榮一
  J. Ceram. Soc. Japan,
  1993年11月, 研究論文（学術雑誌）, 共同, 101, 11, pp 1268, 1273
• 窒化ケイ素の疲労に及ぼす大気中水分および繰返し負荷条件の影響
  小笠原俊夫,馬渕豊,広崎尚登
  J. Ceram. Soc. Japan
  1993年10月, 研究論文（学術雑誌）, 共同, 101, 10, pp 1153, 1158
• Thickness Dependence of Impact Damage Behavior in Silicon Nitride Ceramic
  Y. Akimune, T. Akiba, N. Hirosaki and T. Ogasawara
  J. European Ceram. Soc.
  1993年04月, 研究論文（学術雑誌）, 共同, 11, pp 425, 429
• セラミックスの疲労寿命分布からのき裂進展速度の推定
  小笠原俊夫,穐場亨,秋宗淑雄
  日本機械学会論文集(A編)
  1993年04月, 研究論文（学術雑誌）, 共同, 59, 561, pp 1256, 1261
• Mechanical Properties and microstructure in sintered and HIPed SiC particle / Si3N4 Composites
  Y. Akimune, T. Ogasawara and N. Hirosaki
  J.Mater.Sci.
  1992年10月, 研究論文（学術雑誌）, 共同, 27, pp. 6017, 6021
• Evaluation of Stress Intensity Factor of Silicon Nitride with Bridge Indentation Crack by Caustic Method
  T. Ogasawara, T. Akiba, K. Otani, Y. Akimune and K. Shimizu
  J. Ceram. Soc. Japan,
  1992年08月, 研究論文（学術雑誌）, 共同, 100, 8, pp 1007, 1010
• Influence of Starting Powder Characteristics on Mechanical Properties of SiC-particle / Si3N4 Composites
  Y. Akimune, T. Ogasawara, N. Hirosaki and A. Okada
  J. Ceram. Soc. Japan
  1992年04月, 研究論文（学術雑誌）, 共同, 100, 4, pp 463, 467
• Mechanical Properties of Air-annealed SiC-particle / Al2O3 composite
  Y. Akimune, Y. Katano, T. Akiba and T. Ogasawara
  J.Mater.Sci.Lett
  1992年02月, 研究論文（学術雑誌）, 共同, 11, pp. 695, 697
• Effect of Additive Oxide Amount on Gas Pressure Sintering of Silicon Nitride
  N. Hirosaki, Y. Akimune, T. Ogasawara and A. Okada
  Solid State Phenomena
  1992年01月, 研究論文（学術雑誌）, 共同, 25-26, pp. 403, 410
• SiC-粒子／アルミナ複合材の熱的および機械的特性
  秋宗淑雄,片野靖,穐場亨,小笠原俊夫
  J. Ceram. Soc. Japan
  1991年12月, 研究論文（学術雑誌）, 共同, 99, 12, pp 1265, 1267
• Spherical Particle Impact Damage Behavior of a SiC fibre-reinforced Chemical Vapour Infiltrated SiC Composite
  Y. Akimune, T. Ogasawara, T. Akiba and N. Hirosaki
  J. Mater. Sci. Lett.
  1991年08月, 研究論文（学術雑誌）, 共同, 10, pp. 689, 692
• 常圧焼結窒化ケイ素の回転曲げ疲労挙動
  小笠原俊夫,秋宗淑雄,米田孝治
  J. Ceram. Soc., Japan
  1991年06月, 研究論文（学術雑誌）, 共同, 99, 6, pp 489, 494
• アルミナの研削加工損傷に及ぼす焼鈍処理の影響
  松尾陽太郎,小笠原俊夫,木村脩七,佐藤繁美,安田榮一
  J. Ceram. Soc. Japan
  1991年05月, 研究論文（学術雑誌）, 共同, 99, 5, pp 384, 389
• Mechanical Properties of a SiC-Fiber Reinforced CVI-SiC Composite
  Y. Akimune, T. Ogasawara, N. Hirosaki and K. Yoneda
  J. Ceram. Soc. Japan
  1991年02月, 研究論文（学術雑誌）, 共同, 99, 2, pp 180, 182
• Mechanical Properties of SiC-particle / sialon composites
  Y. Akimune, T. Ogasawara and N. Hirosaki
  J.Mater.Sci.Lett.
  1991年01月, 研究論文（学術雑誌）, 共同, 10, pp. 223, 226
• Oblique Impact Damage by Spherical Particles onto Si3N4
  Y. Akimune, T. Ogasawara, N. Hirosaki and T. Akiba
  Eng.Fract.Mech.
  1991年01月, 研究論文（学術雑誌）, 共同, 40, pp. 887, 892
• Gas-Pressure Sintering and Oxidation Resistance of Y2O3-Nd2O3-doped Silicon Nitride
  N. Hirosaki, Y.Akimune, T. Ogasawara and A. Okada
  Ceramic Transactions (Ceramic Powder Science IV
  1991年01月, 研究論文（学術雑誌）, 共同, 22, pp 663, 668
• Effect of Additive Amount on Oxidation of Y2O3-Nd2O3-doped Silicon Nitride
  N. Hirosaki, Y. Akimune, T. Ogasawara and A. Okada
  J.Mater.Sci.Lett.
  1991年01月, 研究論文（学術雑誌）, 共同, 10, pp 753, 755
• Statistical Analysis of the Effect of Surface Grinding on the Strength of Alumina Using Weibull's multi-modal function
  Y. Matsuo, T. Ogasawara, E. Yasuda and S. Kimura
  J. Mater. Sci.
  1987年10月, 研究論文（学術雑誌）, 共同, 22, pp 1482, 1488
• アルミナの曲げ強度に及ぼす研削加工の影響と多重モードワイブル分布
  松尾陽太郎,小笠原俊夫,安田榮一,木村脩七
  材料
  1987年02月, 研究論文（学術雑誌）, 共同, 36, 401, pp 166, 172
• 蛍光塗料浸透法によるセラミックスの巨視的き裂観察
  松尾陽太郎,小笠原俊夫,北林徹夫,安田榮一,木村脩七
  窯業協会誌
  1985年10月, 研究論文（学術雑誌）, 共同, 93, 10, pp 668, 670

研究発表、招待講演等

• 擬似等方CFRP積層板の有孔圧縮疲労寿命に及ぼす層厚さの影響
  複合材料シンポジウム、日本複合材料学会
  2023年09月12日, 口頭発表（一般）

外部研究資金等

• 溶融含浸法と膜沸騰法による低コストセラミック繊維／シリサイド複合材料の開発（その２）
  共同研究, 自 2023年06月19日, 至 2024年06月18日
• 燃料電池等利用の飛躍的拡大に向けた共通課題解決型産学官連携研究開発事業/水素利用等高度化先端技術開発/マルチロードパス構造による連装型水素タンクモジュールの研究開発
  受託研究, 自 2023年04月01日, 至 2024年03月31日
• 非ＦＷ／分割プリフォームおよび新規樹脂（ＲＥＤＯＸ硬化型樹脂）による高圧水素タンクの革新的ハイレート製造プロセスの開発
  受託研究, 自 2023年04月01日, 至 2024年03月31日
• 奨学寄附金
  奨学寄附金, 自 2023年, 至 2023年
• 局所集中豪雨対策用ポンプ向けCMC軸受の開発
  受託研究, 自 2022年04月01日, 至 2023年03月31日
• 薄層CFRPの破壊メカニズムの解明と構造設計指針の構築
  受託研究, 自 2022年04月01日, 至 2023年03月31日
• 導電成分の微小化及び分散性向上による耐雷複合材料の改良
  共同研究, 自 2018年11月15日, 至 2019年03月31日
• 薄層CFRPの破壊メカニズムの解明と構造設計指針の構築
  受託研究, 自 2018年11月, 至 2019年03月
• 複合材の耐摩耗性向上に関する研究
  受託研究, 自 2018年09月, 至 2019年01月
• CMCの実用材料化を実現する湿式法界面層形成プロセス開発
  共同研究, 自 2018年08月01日, 至 2019年01月31日
• 遠隔操作およびアタッチメントの自動脱着可能な軽量建機システムの開発と実地検証
  共同研究, 自 2018年04月01日, 至 2021年07月31日
• 耐熱CFRPの成形基盤技術に関する研究
  受託研究, 自 2018年04月, 至 2019年03月
• 奨学寄附金
  奨学寄附金, 自 2018年, 至 2018年
• 遠隔操作およびアタッチメントの自動脱着可能な軽量建機システムの開発と実地検証
  共同研究, 自 2017年11月, 至 2018年03月
• 導電性樹脂を適用した複合材料の開発と航空機耐雷構造への適用性評価
  共同研究, 自 2017年08月, 至 2018年03月
• 耐熱CFRPの成形基盤技術に関する研究
  受託研究, 自 2017年04月, 至 2018年03月
• 次世代軽量カーボンハニカムパネルの開発
  受託研究, 自 2017年04月, 至 2018年03月
• CMCの実用材料化を実現する湿式法界面層形成プロセス開発
  共同研究, 自 2016年12月01日, 至 2017年03月31日
• 導電性樹脂を適用した複合材料の開発と航空機耐雷構造への適用性評価
  共同研究, 自 2016年08月29日, 至 2017年03月31日
• 次世代軽量カーボンハニカムパネルの開発
  受託研究, 自 2016年08月, 至 2017年03月
• 超軽量建機アタッチメントおよびブーム等の開発および実地検証
  共同研究, 自 2016年04月01日, 至 2017年03月31日
• 耐熱PMCの成形技術と高温強度試験法に関する研究
  受託研究, 自 2016年04月01日, 至 2017年03月31日
• 超軽量建機アタッチメントおよびブーム等の開発および実地検証
  共同研究, 自 2016年04月, 至 2018年03月
• 耐熱PMCの高温強度試験法と金型プレス成形に関する研究
  受託研究, 自 2015年10月01日, 至 2017年03月31日
• 高性能CNTRP材料設計及びCNTRPプリプレグの量産プロセス技術開発
  受託研究, 自 2015年09月01日, 至 2016年03月31日

委員歴

• 新エネルギー・産業技術総合開発機構　(NEDO)
  経済安全保障重要技術育成プログラム／長距離物資輸送用無人航空機技術の開発・実証　プログラム・オフィサー
  自 20231121, 至 20261031
• 日本ファインセラミックス協会
  ISO-TC206幹事国業務委員会・国内委員会　委員
  自 20220517, 至 20250331
• 新エネルギー・産業技術総合開発機構（NEDO）
  NEDO技術委員
  自 20220509, 至 20250331
• 日本複合材料学会
  会長
  自 20190601, 至 20210530
• Advanced Composite Materials (Taylor & Francis)
  Editor-in-Chief
  自 20130601, 至 20190531
• 日本複合材料学会
  理事・欧文誌編集委員長
  自 20130501, 至 20190430
• 日本航空宇宙学会
  材料部門委員長、幹事
  自 20060401, 至 20100331
• 日本複合材料学会
  理事・邦文誌編集委員長（2005年度～2006年度）、庶務理事（2007年度）
  自 20050401, 至 20080331
• Journal of Composite Materials
  Editorial board member
  自 20050101, 至 20250331
• Composite Science and Techolongy (Elsevier)
  Editorial board member
  自 20040401, 至 20250331

所属学協会

• 日本航空宇宙学会
• 日本複合材料学会
• 日本機械学会
• 日本セラミックス協会
• 強化プラスチック協会
• 日本非破壊検査協会

受賞

• 日本機械学会
  日本機械学会 機械材料・材料加工部門　優秀講演論文賞
  2020年09月
• 日本複合材料学会
  日本複合材料学会論文賞（2019年度）
  Mechanical properties of cross-ply and quasi-isotropic composite laminates processed using aligned multi-walled carbon nanotube/epoxy prepreg
  2020年05月
• 日本機械学会
  日本機械学会 機械材料・材料加工部門　優秀講演論文賞
  Microcrack Observations of SiC Fiber／SiC Composite under Tensile Loading Using Digital Image Correlation
  第６回 JSME／ASME 機械材料・材料加工技術国際会議（ICM&P 2017）において発表
  2018年09月10日
• Engineering Ceramics Division, The American Ceramic Society
  Best Poster Awards, 1st Place, 39th International Conference and Expo on Advanced Ceramics and Composites, The American Ceramic Society
  Experimental Demonstration for Continuum Damage Mechanics Model of SiC/SiC Composites Using Digital Image Correlation Technique under UV light
  2016年01月25日
• 日本複合材料学会
  日本複合材料学会論文賞（2014年度）
  2015年05月
• 日本複合材料学会
  日本複合材料学会論文賞（2013年度）
  2014年05月
• 日本複合材料学会論文賞（2008年度）
  2009年05月
• 日本機械学会
  日本機械学会 機械材料・材料加工部門　優秀講演論文賞
  2006年10月
• 日本先端材料技術協会
  SAMPE-Japan論文賞
  2006年07月
• 日本複合材料学会
  日本複合材料学会論文賞（2004年度）
  2005年05月
• SAMPE, Japan
  Excellent paper award, Japan International SAMPE Symposium and Exhibition (JISSE-8)
  2003年11月
• 航空宇宙技術研究所
  独立行政法人航空宇宙技術研究所　理事長賞
  2002年07月
• The American Ceramic Society
  Technical Presentation 2nd Place Award of the Conference & Exposition on Advanced Ceramic & Composites
  2002年01月