TOHGO KEIICHIRO 東郷敬一郎

… Alternative Names

TOHGO Keiichiro 東郷敬一郎

TOHOGO Keiichiro 東郷敬一郎

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Researcher Number	10155492
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Affiliation (based on the past Project Information) *help	2017: 静岡大学, その他部局等, 理事 2015 – 2017: 静岡大学, 法人本部, 理事 2014: 静岡大学, 工学研究科, 教授 2013: 静岡大学, 工学(系)研究科(研究院), 教授 2011 – 2012: 静岡大学, 工学部, 教授 … More 2008 – 2009: Shizuoka University, 工学部, 教授 2007: 静岡大, 工学部, 教授 2000 – 2005: 静岡大学, 工学部, 教授 1996 – 1998: Shizuoka University, Faculty of Engineering, Professor, 工学部, 教授 1994 – 1995: 静岡大学, 工学部, 助教授 1990 – 1991: 静岡大学, 工学部, 助教授 1987 – 1988: Nagoya University, School of Engineering Research Associate, 工学部, 助手 1986: 名大, 工学部, 助手 Less
Review Section/Research Field	Principal Investigator Materials/Mechanics of materials / Materials/Mechanics of materials / 機械材料工学 Except Principal Investigator Materials/Mechanics of materials / 機械材料工学 / 溶接工学 / Materials/Mechanics of materials
Keywords	Principal Investigator 複合材料 / 力学モデル / 機能性材料 / Fracture Mechanics / 破壊力学 / 傾斜機能材料 / 機械材料・材料力学 / 放電プラズマ焼結 / 生体適合傾斜機能材料 / 材料設計 … More / 材料試験 / 異材界面相 / Deformation Behavior / Composite Materials / Mechanical Model / WC-Co Hardmetal / Two-Phase Sintered Materials / Sintered Materials / 破壊強度特性 / 破壊挙動 / 破壊機構 / 変形挙動 / WC-Co系超硬合金 / 二相焼結材料 / 焼結材料 / Fatigue test / Fracture test / Fracture toughness test / Strength evaluation / Composite model / Inhomogeneity / Composite materials / Functionally graded materials / 破壊靭性試験 / 疲労試験 / 破壊試験 / 破壊靱性試験 / 強度評価 / 複合材料の力学モデル / 材料不均質性 / Production of high performance / Mechanical model / Polycarbonate / NiTi alloy / Functional material / Composite / Shape memory alloy / 機能発現 / ポリカーボネイト / NiTi合金 / 機能材料 / 形状記憶合金 / Debonding damage / Reinforcement cracking / Shape memory alloy composite / Micromechanics / Damage theory / Discontinuously-reinforced composite / 強化材割れ / 有限要素法解析 / マイクロメカニクス / 形状記憶合金複合材料 / 損傷理論 / はく離損傷 / 強化材割れ損傷 / 分散強化型複合材料 / 画像処理 / き裂変位計 / 小型試験片 / 先進材料 / 混合モード破壊靱性 / 破壊靱性評価システム / Glass Particle Reinforced Nylon 66 / Fracture Toughness / Crack Tip Singular Field / Finite Element Method / Particulate Reinforced Composite / Crack Behavior / Functionally Graded Material / 破壊靱性 / ガラス粒子分散ナイロン66 / 破壊靭性 / き裂先端特異場 / 有限要素法 / 粒子分散複合材料 / き裂挙動 / シミュレーション工学 / 複合材料・物性 / 構造・機能材料 / オーステナイト系ステンレス鋼 / 分布き裂 / 表面き裂 / き裂進展 / き裂合体 / き裂発生 / モンテカルロ・シミュレーション / 応力腐食割れ … More Except Principal Investigator き裂進展 / セラミックス / Mode II Growth / Mode I Growth / Anisotropy / Potential / Mixed Mode / Crack Growth / Corrosion Fatigue / Aluminum Alloy / モードII / モードI / カソード防食 / 防食電位 / モードII進展 / モードI進展 / 食塩水 / 混合モード / 腐食疲労 / 高力アルミニウム合金 / Cyclic fatigue / Ceramics Static fatigue / Silicon nitride / WC-Co hardmetal / Tension-compression fatigue / 窒化珪素 / 疲労限 / 応力比 / 繰返し疲労 / 静疲労 / 窒化けい素 / WCーCo超硬合金 / 引張・圧縮疲労 / Notched specimen / Case hardening steel / Inclusion / Subsurface crack nucleation / High Strength steel / Giga-cycle fatigue / Intermittent ultrasonic loading / Ultrasonic fatigue / P-S-N線図 / 浸炭処理網 / 高強度網 / 切欠き材 / 浸炭処理鋼 / 介在物 / 内部破壊 / 高強度鋼 / ギガサイクル疲労 / 断続負荷法 / 超音波疲労 / Copper / Silver / Gold / Microcrack / Fatigue Slip Band / Scanning Tunneling Microscope / マイクロクラックの発生 / 走差トンネル顕微鏡 / 銅 / 銀 / 金 / マイクロクラック / 疲労すべり帯 / 走査トンネル顕微鏡 / 結晶方位 / き裂発生 / 結晶粒界 / き裂 / 応力腐食割れ / 環境強度 / 超高サイクル / CFRP / 炭素繊維強化プラスチック / 繊維強化プラスチック / 疲労 / 化合物 / 部分安定化ジルコニア / 経年変化割れ / 強度特性 / 粉末冶金 / 傾斜機能複合材料 / チタン / ハイドロキシアパタイト / 金属射出成形法 / 粉末冶金法 / 医用傾斜機能材料 / 複合材料・物性 / 産学連携 / 安全・安心 / 若手研究者 / 重厚長大技術 / 機械材料・材料力学 Less

Fabrication of biocompatible functionally graded materials considering creation of bimaterials-interphase in spark plasma sinteringPrincipal Investigator
- Principal Investigator
  
  TOHGO KEIICHIRO
- Project Period (FY)
  2015 – 2017
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Investigation of nucleation behavior of stress corrosion cracking by in-situ observation with microdroplet technique and its life evaluation
- Principal Investigator
  
  Fujii Tomoyuki
- Project Period (FY)
  2014 – 2016
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Development of Accelerated Testing Method for Very High Cycle Fatigue of CFRP
- Principal Investigator
  
  Shimamura Yoshinobu
- Project Period (FY)
  2013 – 2015
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Numerical simulation of spark plasma sintering process and fabrication of titanium-based biocompatible functionally graded materialsPrincipal Investigator
- Principal Investigator
  
  TOHGO KEIICHIRO
- Project Period (FY)
  2011 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
ハイドロキシアパタイト-チタン医用傾斜機能材料のMIM法による創生技術と強度評価Principal Investigator
- Principal Investigator
  
  東郷敬一郎, 荒木弘安
- Project Period (FY)
  2008 – 2009
- Research Category
  
  Grant-in-Aid for Challenging Exploratory Research
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Study on multi-scale behavior of stress corrosion cracking and life prediction based on unified simulationPrincipal Investigator
- Principal Investigator
  
  TOHGO Keiichiro
- Project Period (FY)
  2007 – 2009
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
重厚長大技術分野における材料力学研究の新展開
- Principal Investigator
  
  坂真澄
- Project Period (FY)
  2005
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Tohoku University
Fracture Mechanism and Strength Evaluation of Functionally Graded Materials Taking Account of Inhomogeneity and Gradation of MicrostructurePrincipal Investigator
- Principal Investigator
  
  TOHGO Keiichiro
- Project Period (FY)
  2003 – 2005
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Quick estimating method of giga-cycle fatigue properties by an intermittent ultrasonic loading
- Principal Investigator
  
  ISHII Hitoshi
- Project Period (FY)
  2001 – 2002
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Mechanism to produce high performance by combining shape memory alloy fibers and its application to material developmentPrincipal Investigator
- Principal Investigator
  
  TOHGO Keiichiro
- Project Period (FY)
  2000 – 2001
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Damage theory of discontinuously-reinforced composites with reinforcement cracking and mechanism to produce high performancePrincipal Investigator
- Principal Investigator
  
  TOHGO Keiichiro
- Project Period (FY)
  1997 – 1998
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Development of a system evaluating mixed mode fracture toughness by small specimen for advanced materialsPrincipal Investigator
- Principal Investigator
  
  TOHGO Keiichiro
- Project Period (FY)
  1995 – 1996
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Fundamental Investigation on Crack Behavior in Particulate-Dispersed Functionally Graded MaterialPrincipal Investigator
- Principal Investigator
  
  TOHGO Keiichiro
- Project Period (FY)
  1994 – 1995
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  Materials/Mechanics of materials
- Research Institution
  Shizuoka University
Study on Fatigue Slip Bands and Nucleation of Microcracks by Using Scanning Tunneling Microscope
- Principal Investigator
  
  ISHII Hitoshi
- Project Period (FY)
  1990 – 1991
- Research Category
  
  Grant-in-Aid for General Scientific Research (B)
- Research Field
  
  機械材料工学
- Research Institution
  Shizuoka University
Fatigue of hard and bittle materials
- Principal Investigator
  
  OTSUKA Akio
- Project Period (FY)
  1987 – 1988
- Research Category
  
  Grant-in-Aid for General Scientific Research (B)
- Research Field
  
  溶接工学
- Research Institution
  Nagoya University
Potential and Anisotropy of Material Effects on Corrosion Fatigue Crack Growth Characteristics under Mixed Mode Loading
- Principal Investigator
  
  MORI Kaname
- Project Period (FY)
  1987 – 1988
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  機械材料工学
- Research Institution
  Nagoya University
Investigation on Deformation and Fracture Behavior of Sintered Materials from a viewpoint of CompositePrincipal Investigator
- Principal Investigator
  
  TOHOGO Keiichiro
- Project Period (FY)
  1986 – 1987
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  機械材料工学
- Research Institution
  Nagoya University

[Book] 材料強度解析学-基礎から復号材料の強度解析まで-2004
- Author(s)
  東郷敬一郎
- Total Pages
  325
- Publisher
  (株)内田老鶴圃
- Data Source
  KAKENHI-PROJECT-15360050
[Book] 材料強度解析学 -基礎から複合材料の強度解析まで-2004
- Author(s)
  東郷敬一郎
- Total Pages
  325
- Publisher
  (株)内田老鶴圃
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Book] Analysis for Strength of Materials, Form Fundamentals to Strength Evaluation of Composite Materials2004
- Author(s)
  Keiichiro Tohgo
- Publisher
  Uchida Rokakuho Publishing Co., Ltd.,
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Fabrication of alumina-titanium composites by spark plasma sintering and their mechanical properties2018
- Author(s)
  Tomoyuki Fujii, Keiichiro Tohgo, Masahiro Iwao, Yoshinobu Shimamura
- Journal Title
  
  Journal of Alloys and Compounds
  
  Volume: 744 Pages: 759-768
- DOI
  10.1016/j.jallcom.2018.02.142
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15H03891
[Journal Article] Fabrication of a PSZ-Ti functionally graded material by spark plasma sintering and its fracture toughness2017
- Author(s)
  1.Tomoyuki Fujii, Keiichiro Tohgo, Hiroshi Isono, Yoshinobu Shimamura
- Journal Title
  
  Materials Science & Engineering A
  
  Volume: 682 Pages: 656-663
- DOI
  10.1016/j.msea.2016.11.091
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15H03891
[Journal Article] Densification process in fabrication of PSZ-Ti composites by spark plasma sintering technique2017
- Author(s)
  Tomoya Shinohara, Tomoyuki Fujii, Keiichiro Tohgo, Yoshinobu Shimamura
- Journal Title
  
  Materials Characterization
  
  Volume: 132 Pages: 230-238
- DOI
  10.1016/j.matchar.2017.08.016
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15H03891
[Journal Article] Influence of particle size and debonding damage on an elastic-plastic singular field around a crack-tip in particulate-reinforced composites2014
- Author(s)
  K.Tohgo, T.Fujii, D.Kato, Y.Shimamura
- Journal Title
  
  Acta Mechanica
  
  Volume: Vol.225 Issue: 4-5 Pages: 1373-1389
- DOI
  10.1007/s00707-013-1052-6
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23360053
[Journal Article] Monte Carlo simulation of stress corrosion cracking on a smooth surface of sensitized stainless steel type 3042009
- Author(s)
  K.Tohgo
- Journal Title
  
  Corrosion Science Vol. 51
  
  Pages: 2208-2217
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19360047
[Journal Article] Monte Carlo simulation of stress corrosion cracking on a smooth surface of sensitized stainless steel type 3042009
- Author(s)
  K. Tohgo, H. Suzuki, Y. Shimamura, G. Nakayama, T. Hirano
- Journal Title
  
  Corrosion Science Vol.51
  
  Pages: 2208-2217
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19360047
[Journal Article] ステンレス鋼SUS 304における応力腐食割れの表面き裂効果を考慮したモンテカルロ・シミュレーション2008
- Author(s)
  東郷敬一郎, 鈴木洋光, 島村佳伸, 中山元, 平野隆
- Journal Title
  
  日本機会学会論文集A編 74巻
  
  Pages: 128-136
- NAID
  110006571954
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19360047
[Journal Article] 応力分布下における応力腐食割れのモンテカルロ・シミュレーション2008
- Author(s)
  鈴木洋光, 東郷敬一郎, 島村佳伸, 中山元, 平野隆
- Journal Title
  
  材料 57巻
  
  Pages: 1191-1197
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19360047
[Journal Article] Monte Carlo Simulation of Stress Corrosion Cracking in Structural Metal Materials Taking Account of Surface Crack Effects2007
- Author(s)
  K. Tohgo, H. Suzuki, Y. Shimamura
- Journal Title
  
  Key Engineering Materials Vol.353-358
  
  Pages: 1068-1071
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19360047
[Journal Article] Damage Behavior and Life Prediction in CFRP Cross-Ply Laminates under Fatigue Loading2006
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Trans.of Japan Society of Mechanical Engineers, Ser.A (in press)
- NAID
  110004763319
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] 構造材料における応力腐食割れのモンテカルロシミュレーション2006
- Author(s)
  東郷敬一郎(小粥宣拓, 中山元, 平野隆)
- Journal Title
  
  第55回理論応用力学講演会講演論文集
  
  Pages: 577-578
- NAID
  130005020442
- Data Source
  KAKENHI-PROJECT-17636002
[Journal Article] Two-Phase Composite Model Taking into Account the Matricity of Microstructure and Its Application to Functionally Graded Materials2006
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Composite, Part A (in press)
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Fatigue Behavior of CFRP Cross-Ply Laminates under On-Axis and Off-Axis Cyclic Loading2006
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  International Journal of Fatigue (in press)
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] 疲労負荷を受けるCFRP直交積層板の損傷挙動と寿命予測2006
- Author(s)
  東郷敬一郎
- Journal Title
  
  日本機械学会論文集 A編 (印刷中)
- NAID
  110004763319
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] セラミックス-金属系傾斜機能材料への破壊力学の応用と破壊靭性評価2005
- Author(s)
  東郷敬一郎
- Journal Title
  
  実験力学 5巻・2号
  
  Pages: 107-114
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] セラミックス-金属系傾斜機能材料の三点曲げ負荷による破壊過程2005
- Author(s)
  東郷敬一郎
- Journal Title
  
  日本機械学会論文集 A編 71巻・701号
  
  Pages: 124-131
- NAID
  110004998919
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] セラミックス-金属系傾斜機能材料における破壊靱性分布の評価2005
- Author(s)
  東郷敬一郎
- Journal Title
  
  日本機械学会講演論文集 No.05-9
  
  Pages: 327-328
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] 複合材料のマイクロメカニクス・損傷解析の最新動向-IV 直交積層板の層内割れ損傷理論2005
- Author(s)
  東郷敬一郎
- Journal Title
  
  日本複合材料学会誌 31巻・5号
  
  Pages: 205-213
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Evaluation of R-curve Behavior of Ceramic-Metal Functionally Graded Materials by Stable Crack Growth2005
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Engineering Fracture Mechanics Vol.72, No.15
  
  Pages: 2359-2372
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Recent Development in Micromechanics and Damage Analysis of Composite Materials, IV --Ply-Cracking Damage Theory in Cross-Ply Laminates2005
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Journal of Japan Society for Composite Materials Vol.31, No.5
  
  Pages: 205-213
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] セラミックス-金属系傾斜機能材料の三点曲げ負荷による破壊過程2005
- Author(s)
  東郷敬一郎
- Journal Title
  
  日本機械学会論文集A編 71巻・701号
  
  Pages: 124-131
- NAID
  110004998919
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Evaluation of Fracture Toughness Distribution in Ceramic-Metal Functionally Graded Materials2005
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Proc.JSME Meeting No.05-9
  
  Pages: 327-328
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] セラミックス-金属系傾斜機能材料への破壊力学の応用と破壊靱性評価2005
- Author(s)
  東郷敬一郎
- Journal Title
  
  実験力学 5巻・2号
  
  Pages: 107-114
- NAID
  10016443188
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Application of Fracture Mechanics to Ceramic-Metal Functionally Graded Materials and Evaluation of Fracture Toughness2005
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Journal of JSEM Vol.5, No.2
  
  Pages: 107-114
- NAID
  10016443188
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Elastic and Elastic-Plastic Singular Fields around a Crack-Tip in Particulate-Reinforced Composites with Progressive Debonding Damage2005
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  International Journal of Solids and Structures Vol.42
  
  Pages: 6566-6585
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Fracture Process of Ceramic-Metal Functionally Graded Material under Three-Point Bending2005
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Trans.of Japan Society of Mechanical Engineers, Ser.A Vol.71, No.701
  
  Pages: 124-131
- NAID
  110004998919
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Evaluation of R-curve Behavior of Ceramic-Metal Functionally Graded Materials by Stable Crack Growth2005
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Engineering Fracture Mechanics Vol. 72, No.15
  
  Pages: 2359-2372
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Influence of Material Composition on Mechanical Properties and Fracture Behavior of Ceramic-Metal Composites2005
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Key Engineering Materials Vols.297-300
  
  Pages: 1516-1521
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] セラミックス-金属系傾斜機能材料の三点曲げ負荷による破壊過程2005
- Author(s)
  東郷敬一郎
- Journal Title
  
  日本機械学会論文集A編 71巻・701号
  
  Pages: 124-131
- NAID
  110004998919
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] 微視組織のマトリッシティを考慮したニ相複合材料の力学モデルと傾斜機能材料への応用2004
- Author(s)
  東郷敬一郎
- Journal Title
  
  日本機械学会講演論文集 No.04-6
  
  Pages: 383-394
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Influence of Coarsening Treatment on Fatigue Strength and Fracture Toughness of Al-Si-Mg Alloy Casting2004
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Key Engineering Materials Vols.261-263
  
  Pages: 1263-1268
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Fatigue Behavior of CFRP Cross-Ply Laminates under On-Axis and Off-Axis Cyclic Loading2004
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  3rd Int.Conference on Fatigue of Composites(ICFC3)
  
  Pages: 113-114
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Influence of Material Composition on Mechanical Properties and Fracture Behavior of Ceramic-Metal Composites2004
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Asian Pacific Conference for Fracture and Strength '04(APCFS'04)
  
  Pages: 137-137
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Influence of Debonding Damage on Elastic and Elastic-Plastic Singular Fields around a Crack-Tip in Particulate-Reinforced Composites2004
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Journal of Society of Materials Science Japan Vol.53, No.8
  
  Pages: 870-876
- NAID
  110006266337
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] 粒子分散複合材料のき裂先端近傍の弾性・弾塑性特異場に及ぼすはく離損傷の影響2004
- Author(s)
  東郷敬一郎
- Journal Title
  
  材料 53巻・8号
  
  Pages: 870-876
- NAID
  110006266337
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] A Two-Phase Composite Model Taking Account of Matricity of Microstructure and Its Application to Functionally Graded Materials2004
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Proc.JSME Meeting No.04-6
  
  Pages: 383-394
- NAID
  110004071349
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] 粒子分散複合材料のき裂先端近傍の弾性・弾塑性特異場に及ぼすはく離損傷の影響2004
- Author(s)
  東郷敬一郎
- Journal Title
  
  材料 53巻・8号
  
  Pages: 870-876
- NAID
  110006266337
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Two-Phase Composite Model Taking Account of Matricity of Microstructure and Its Application to Functionally Graded Materials2004
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  11th US-Japan Confarence on Composite Materials and 7th International Conference on Textile Composites
- NAID
  110004071349
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Fatigue Behavior of CFRP Cross-Ply Laminates under Axial Cyclic Load2003
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Proc. of Int. Conf. Advanced Technology in Experimental Mechanics 2003 (CD-ROM)
  
  Pages: 2003-2003
- NAID
  110002501623
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Fatigue Behavior of CFRP Cross-Ply Laminates under Axial Cyclic Load2003
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Proc.of Int.Conf.Advanced Technology in Experimental Mechanics 2003 (CD-ROM)
- NAID
  110002501623
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Fatigue Strength and Damage Behavior of Glass Particle Reinforced Nylon 66 Composites2003
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Proc.of 9th Int.Conf.Mechanical Behavior of Materials (CD-ROM)
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Journal Article] Fatigue Strength and Damage Behavior of Glass Particle Reinforced Nylon 66 Composites2003
- Author(s)
  Keiichiro Tohgo
- Journal Title
  
  Proc. of 9th Int. Conf. Mechanical Behavior of Materials (CD-ROM)
  
  Pages: 2003-2003
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15360050
[Presentation] 放電プラズマ焼結により作製したAl2O3/Ti 界面の焼結過程と機械的特性の評価2017
- Author(s)
  後藤健太、藤井朋之、東郷敬一郎、島村佳伸
- Organizer
  日本機械学会、M&M2017材料力学カンファレンス
- Data Source
  KAKENHI-PROJECT-15H03891
[Presentation] 放電プラズマ焼結によるAl2O3-Ti複合材料の作製と機械的特性評価2017
- Author(s)
  藤井朋之、東郷敬一郎、岩尾優宏、島村佳伸
- Organizer
  日本材料学会、高温強度・破壊力学合同シンポジウム・第18回破壊力学シンポジウム
- Data Source
  KAKENHI-PROJECT-15H03891
[Presentation] オーステナイト系ステンレス鋼の応力腐食き裂進展に及ぼす応力拡大係数変化率の影響2016
- Author(s)
  藤井朋之, 河守基寛, 東郷敬一郎, 島村佳伸
- Organizer
  日本材料学会第６５期学術講演会
- Place of Presentation
  富山大学五福キャンパス，富山県富山市
- Year and Date
  2016-05-27
- Data Source
  KAKENHI-PROJECT-26420011
[Presentation] Fabrication of alumina-titanium composites by spark plasma sintering and their mechanical properties2016
- Author(s)
  2.Masahiro Iwao, Tomoyuki Fujii, Keiichiro Tohgo, Yoshinobu Shimamura
- Organizer
  The 10th Asia-Pacific Conference on Fracture and Strength(APCFS2016)
- Place of Presentation
  富山国際会議場、富山県、富山市
- Year and Date
  2016-09-19
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15H03891
[Presentation] Mechanical and crystallographic evaluation of nucreation behavior of stress corrosion cracking2016
- Author(s)
  Yota Mori, Tomoyuki Fujii, Keiichiro Tohgo, Yoshinobu Shimamura
- Organizer
  International Conference of Advances in Mechanical Engineering 2016 (ICAME2016)
- Place of Presentation
  Golden Tulip Hotel, Hamdeok，済州島，韓国
- Year and Date
  2016-09-02
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26420011
[Presentation] 放電プラズマ焼結によるセラミックス－金属界面相の形成と力学特性の評価2016
- Author(s)
  藤井朋之, 東郷敬一郎, 篠原智也, 島村佳伸
- Organizer
  日本機械学会M&M2016材料力学カンファレンス
- Place of Presentation
  神戸大学六甲台第二キャンパス、兵庫県、神戸市
- Year and Date
  2016-10-08
- Data Source
  KAKENHI-PROJECT-15H03891
[Presentation] Fabrication of PSZ-Ti functionally graded material by spark plasma sintering and its mechanical properties2016
- Author(s)
  1.Tomoyuki Fujii, Keiichiro Tohgo, Hiroshi Isono, Yoshinobu Shimamura
- Organizer
  International Conference of Advances in Mechanical Engineering 2016 (ICAME2016)/14th Joint Symposium among Sister Universities in Mechanical Engineering (JSSUME2016)
- Place of Presentation
  済州島（韓国）
- Year and Date
  2016-09-02
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15H03891
[Presentation] SCC き裂発生挙動の力学的および結晶学的評価2016
- Author(s)
  森要太，藤井朋之，東郷敬一郎，島村佳伸
- Organizer
  M&M2016材料力学カンファレンス
- Place of Presentation
  神戸大学　六甲台第二キャンパス，兵庫県神戸市
- Year and Date
  2016-10-08
- Data Source
  KAKENHI-PROJECT-26420011
[Presentation] オーステナイト系ステンレス鋼における応力腐食割れの発生挙動の結晶学的評価2015
- Author(s)
  藤井朋之,東郷敬一郎,三浦祐太朗, 森要太, 島村佳伸
- Organizer
  第17回破壊力学シンポジウム
- Place of Presentation
  京都テルサ（京都府京都市）
- Year and Date
  2015-10-13
- Data Source
  KAKENHI-PROJECT-26420011
[Presentation] ステンレス鋼のSCCき裂進展挙動に及ぼす荷重条件の影響2015
- Author(s)
  河守基寛, 藤井朋之, 東郷敬一郎, 島村佳伸
- Organizer
  M&M2015材料力学カンファレンス
- Place of Presentation
  慶応義塾大学（神奈川県横浜市）
- Year and Date
  2015-11-21
- Data Source
  KAKENHI-PROJECT-26420011
[Presentation] Stress corrosion cracking in sensitized austenitic stainless steel type 304 under tetrathionate solution environment2015
- Author(s)
  Tomoyuki Fujii, Keiichiro Tohgo, Yutaro Miura and Yoshinobu Shimamura
- Organizer
  12th International Conference on the Mechanical Behavior of Materials
- Place of Presentation
  Karlsuehe Convention Centre(Karlsruhe, Germany)
- Year and Date
  2015-05-10
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26420011
[Presentation] オーステナイト系ステンレス鋼におけるSCC き裂発生挙動評価2015
- Author(s)
  藤井朋之,東郷敬一郎,三浦祐太朗,島村佳伸
- Organizer
  日本材料学会　第64期学術講演会
- Place of Presentation
  山形大学（山形県米沢市）
- Year and Date
  2015-05-22
- Data Source
  KAKENHI-PROJECT-26420011
[Presentation] 放電プラズマ焼結によるPSZ-Ti 複合材料の作製と強度評価2013
- Author(s)
  藤井朋之, 東郷敬一郎, 原田将孝, 島村佳伸
- Organizer
  日本機械学会M&M2013材料力学カンファレンス
- Place of Presentation
  岐阜
- Year and Date
  2013-10-12
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] 放電プラズマ焼結によるPSZ-Ti 複合材料の作製と機械的特性評価2013
- Author(s)
  原田将孝,藤井朋之,東郷敬一郎,島村佳伸
- Organizer
  日本機械学会東海支部第62期総会講演会
- Place of Presentation
  津
- Year and Date
  2013-03-19
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Fabrication and Strength Evaluation of Biocompatible Ceramic-Metal Composite Materials2013
- Author(s)
  東郷敬一郎
- Organizer
  The 7th International Symposium on Advanced Mechatronics　Engineering (7th ISAME)
- Place of Presentation
  Changwon Exhibition Convention Center　(Changwon, Korea)
- Invited
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Investigation of oxygen diffusion behavior in PSZ-Ti composites during spark plasma sintering by multi-physics simulation2013
- Author(s)
  Y.Fukui, T.Fujii, K.Tohgo, Y.Shimamura
- Organizer
  FEOFS2013
- Place of Presentation
  Jeju, Korea
- Year and Date
  2013-06-10
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Influence of particle size and debonding damage on an elastic-plastic singular field around a crack-tip in particulate-reinforced composites2013
- Author(s)
  K.Tohgo, T.Fujii, D.Kato, Y.Shimamura
- Organizer
  The 9th Japan-Korea Joint Symposium on Composite Materials
- Place of Presentation
  鹿児島
- Year and Date
  2013-09-25
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Fabrication and Strength Evaluation of Biocompatible Ceramic-Metal Composite Materials2013
- Author(s)
  K.Tohgo, T.Fujii, Y.Shimamura
- Organizer
  7th ISAME
- Place of Presentation
  Changwon, Korea
- Year and Date
  2013-01-10
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Influence of Particle Size and Debonding Damage on an Elastic-Plastic Singular Field around a Crack-Tip in Particulate- Reinforced Composites, Society of Engineering Science (SES 2013)2013
- Author(s)
  K.Tohgo, T.Fujii, D.Kato, Y.Shimamura
- Organizer
  50th Anuual Technical meeting ASME-AMD annual summer meeting
- Place of Presentation
  Providence, USA
- Year and Date
  2013-07-29
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] PSZ-Ti複合材料における酸素拡散を考慮した放電プラズマ焼結過程のマルチフィジックス解析2013
- Author(s)
  福井大和, 藤井朋之, 東郷敬一郎, 島村佳伸
- Organizer
  日本機械学会M&M2013材料力学カンファレンス
- Place of Presentation
  岐阜
- Year and Date
  2013-10-12
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] 放電プラズマ焼結によるPSZ-Ti 複合材料の創製のためのTi 酸化挙動の評価2012
- Author(s)
  原田将孝,藤井朋之,東郷敬一郎,島村佳伸
- Organizer
  第56回日本学術会議材料工学連合会
- Place of Presentation
  京都
- Year and Date
  2012-10-29
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Fabrication of PSZ-Ti composites by spark plasma sintering method2012
- Author(s)
  M.Harada, T.Fujii, K.Tohgo, Y.Shimamura
- Organizer
  JSSUME2012
- Place of Presentation
  長崎
- Year and Date
  2012-08-25
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] 粒子分散複合材料のき裂先端近傍の弾性・弾塑性特異場に及ぼす粒子寸法とはく離損傷の影響2012
- Author(s)
  東郷敬一郎,藤井朋之,加藤大輔,島村佳伸
- Organizer
  日本機械学会M&M2012材料力学カンファレンス
- Place of Presentation
  松山
- Year and Date
  2012-09-23
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] 粒子分散複合材料における粒子寸法効果とはく離損傷を考慮した有限要素法の開発2012
- Author(s)
  加藤大輔,藤井朋之,東郷敬一郎,島村佳伸
- Organizer
  第61回理論応用力学講演会
- Place of Presentation
  東京
- Year and Date
  2012-03-08
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] 粒子分散複合材料のき裂先端近傍の弾性・弾塑性特異場に及ぼす粒子寸法とはく離損傷の影響2012
- Author(s)
  東郷敬一郎
- Organizer
  日本機械学会 M&M2012材料力学カンファレンス
- Place of Presentation
  愛媛大学（松山）
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] マルチフィジックスシミュレーションによるPSZ-Ti 複合材料の放電プラズマ焼結過程の検討2012
- Author(s)
  藤井朋之,東郷敬一郎,中沢和史,島村佳伸
- Organizer
  第56回日本学術会議材料工学連合会
- Place of Presentation
  京都
- Year and Date
  2012-10-29
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Evaluation of Mechanical Properties of PSZ-Ti Biocompatible Composite Fabricated by MIM Method2011
- Author(s)
  T.Fujii, K.Tohgo, M.Ishikura, Y.Shimamura
- Organizer
  ATEM'11
- Place of Presentation
  神戸
- Year and Date
  2011-09-21
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Monte Carlo simulation of stress corrosion cracking on smooth surface under non-uniform stress condition2009
- Author(s)
  H. Suzuki, K. Tohgo, Y. Shimamura, G. Nakayama, T. Hirano
- Organizer
  Asian-Pacific Corrosion Forum-Corrosion in Nuclear Systems 2009
- Place of Presentation
  さいたま
- Year and Date
  2009-05-22
- Data Source
  KAKENHI-PROJECT-19360047
[Presentation] Monte Carlo simulation of stress corrosion cracking in an austenitic stainless steel type 3042009
- Author(s)
  H. Suzuki, K. Tohgo, Y. Shimamura, G. Nakayama, T. Hirano
- Organizer
  12th International Conference on Fracture
- Place of Presentation
  Ottawa, Canada
- Year and Date
  2009-07-14
- Data Source
  KAKENHI-PROJECT-19360047
[Presentation] Monte Carlo simulation of stress corrosion cracking on smooth surface of a sensitized stainless steel type 304 under non-uniform stress condition2009
- Author(s)
  H. Suzuki, K. Tohgo, Y. Shimamura, G. Nakayama, T. Hirano
- Organizer
  APCMM
- Place of Presentation
  横浜
- Year and Date
  2009-11-14
- Data Source
  KAKENHI-PROJECT-19360047
[Presentation] 応力腐食割れのモンテカルロ・シミュレーションのマルチスケール化2008
- Author(s)
  鈴木洋光, 東郷敬一郎, 島村佳伸, 原木良輔
- Organizer
  日本機械学会M&M2008材料力学カンファレンス
- Place of Presentation
  草津
- Year and Date
  2008-09-17
- Data Source
  KAKENHI-PROJECT-19360047
[Presentation] Monte Carlo Simulation of Stress Corrosion Cracking on Smooth Surface under Non-uniform Stress Condition2008
- Author(s)
  H. Suzuki, K. Tohgo, Y. Shimamura, G. Nakayama, T. Hirano
- Organizer
  JSSUME2008
- Place of Presentation
  浜松
- Year and Date
  2008-08-25
- Data Source
  KAKENHI-PROJECT-19360047
[Presentation] Monte Carlo Simulation of Stress Corrosion Cracking in an Austenitic Stainless Steel Type 304 Taking Account of Surface Crack Effect2008
- Author(s)
  H. Suzuki, K. Tohgo, Y. Shimamura, G. Nakayama, Y. Sakakibara, T. Hirano
- Organizer
  腐食防食協会材料と環境2008
- Place of Presentation
  大宮
- Year and Date
  2008-05-13
- Data Source
  KAKENHI-PROJECT-19360047
[Presentation] 応力分布下の平滑表面における応力腐食割れのモンテカルロ・シミュレーション2007
- Author(s)
  鈴木洋光, 東郷敬一郎, 島村佳伸, 中山元, 平野隆
- Organizer
  日本材料学会第13回破壊力学シンポジウム
- Place of Presentation
  熱海
- Year and Date
  2007-12-17
- Data Source
  KAKENHI-PROJECT-19360047
[Presentation] In-situ Observation of Stress Corrosion Cracking Behavior in Austenitic Stainless Steel
- Author(s)
  Yutaro Miura, Tomoyuki Fujii, Keiichiro Tohgo, and Yoshinobu Shimamura
- Organizer
  The 13th Joint Symposium among Sister Univerties in Mechanical Engineering (JSSUME2014)
- Place of Presentation
  Yokohama Kaiko Kinen Kaikan（Yokohama, Kanagawa）
- Year and Date
  2014-08-15 – 2014-08-17
- Data Source
  KAKENHI-PROJECT-26420011
[Presentation] Influence of Particle Size and Debonding Damage on an Elastic-Plastic Singular Field around a Crack-Tip in Particulate-Reinforced Composites
- Author(s)
  東郷敬一郎
- Organizer
  Society of Engineering Science (SES 2013), 50th Anuual Technical meeting ASME-AMD annual summer meeting
- Place of Presentation
  Brown 大学（Providence, USA）
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Influence of particle size and debonding damage on an elastic-plastic singular field around a crack-tip in particulate-reinforced composites
- Author(s)
  東郷敬一郎
- Organizer
  The 9th Japan-Korea Joint Symposium on Composite Materials
- Place of Presentation
  鹿児島大学（鹿児島）
- Data Source
  KAKENHI-PROJECT-23360053
[Presentation] Stress corrosion cracking in sensitized austenitic stainless steel type 304 under tetrathionate solution environment
- Author(s)
  Tomoyuki Fujii, Keiichiro Tohgo, Yutaro Miura, and Yoshinobu Shimamura
- Organizer
  The 12th International Conference on the Mechanical Behavior of Materials
- Place of Presentation
  Karlsruhe Convention Centre（Karlsruhe ，Germany）
- Year and Date
  2015-05-10 – 2015-05-14
- Data Source
  KAKENHI-PROJECT-26420011
[Presentation] オーステナイト系ステンレス鋼におけるSCCき裂発生挙動評価
- Author(s)
  藤井朋之，東郷敬一郎，三浦祐太朗，島村佳伸
- Organizer
  第64期通常総会･学術講演会
- Place of Presentation
  山形大学米沢キャンパス（山形県米沢市）
- Year and Date
  2015-05-22 – 2015-05-24
- Data Source
  KAKENHI-PROJECT-26420011

1. ARAKI Hiroyasu (60115433)

# of Collaborated Projects: 8 results

# of Collaborated Products: 0 results
2. ISHII Hitoshi (90022235)

# of Collaborated Projects: 7 results

# of Collaborated Products: 0 results
3. SHIMAMURA Yoshinobu (80272673)

# of Collaborated Projects: 5 results

# of Collaborated Products: 33 results
4. FUJII Tomoyuki (30377840)

# of Collaborated Projects: 4 results

# of Collaborated Products: 32 results
5. MORI Kaname (70023207)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
6. OTSUKA Akio (60022993)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
7. MIYATA Takashi (20023228)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
8. KATOGI Hideaki (00625296)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
9. SAWAKI Yozo (30005417)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
10. SASAKI Akira (80022309)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
11. 坂真澄 (20158918)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
12. 岸本喜久雄 (30111652)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
13. 北村隆行 (20169882)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
14. 久保司郎 (20107139)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
15. 吉川暢宏 (70230696)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

TOHGO KEIICHIRO 東郷 敬一郎

TOHGO Keiichiro 東郷 敬一郎

TOHOGO Keiichiro 東郷 敬一郎

Research Projects

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Fabrication of biocompatible functionally graded materials considering creation of bimaterials-interphase in spark plasma sinteringPrincipal Investigator

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Investigation of nucleation behavior of stress corrosion cracking by in-situ observation with microdroplet technique and its life evaluation

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Development of Accelerated Testing Method for Very High Cycle Fatigue of CFRP

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Numerical simulation of spark plasma sintering process and fabrication of titanium-based biocompatible functionally graded materialsPrincipal Investigator

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ハイドロキシアパタイト-チタン医用傾斜機能材料のMIM法による創生技術と強度評価Principal Investigator

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Study on multi-scale behavior of stress corrosion cracking and life prediction based on unified simulationPrincipal Investigator

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重厚長大技術分野における材料力学研究の新展開

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Fracture Mechanism and Strength Evaluation of Functionally Graded Materials Taking Account of Inhomogeneity and Gradation of MicrostructurePrincipal Investigator

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Quick estimating method of giga-cycle fatigue properties by an intermittent ultrasonic loading

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Mechanism to produce high performance by combining shape memory alloy fibers and its application to material developmentPrincipal Investigator

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Damage theory of discontinuously-reinforced composites with reinforcement cracking and mechanism to produce high performancePrincipal Investigator

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Development of a system evaluating mixed mode fracture toughness by small specimen for advanced materialsPrincipal Investigator

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Fundamental Investigation on Crack Behavior in Particulate-Dispersed Functionally Graded MaterialPrincipal Investigator

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TOHGO KEIICHIRO 東郷敬一郎

TOHGO Keiichiro 東郷敬一郎

TOHOGO Keiichiro 東郷敬一郎