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Proceedings Papers

Benchmark Analysis by Beremin Model and GTN Model in CAF Subcommittee

Takatoshi Hirota, Yasuto Nagoshi, Kiminobu Hojo, Hiroshi Okada, Akiyuki Takahashi, Jinya Katsuyama, Takashi Ueda, Takuya Ogawa, Kenji Yashirodai, Mitsuru Ohata, Fumiyoshi Minami
Proc. ASME. PVP2021, Volume 1: Codes and Standards, V001T01A056, July 13–15, 2021
Paper No: PVP2021-61668
DOI: https://doi.org/10.1115/PVP2021-61668
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Topics: Brittleness, Computer simulation, Damage, Deformation, Ductile fracture, Ductile-brittle transition, Evaluation methods, Finite element analysis, Finite element model, Flat plates
Proceedings Papers

Large-Scale Parallel Thermal Elastic-Plastic Welding Simulation Using Balancing Domain Decomposition Method

Yasunori Yusa, Yuma Murakami, Hiroshi Okada
Proc. ASME. PVP2019, Volume 2: Computer Technology and Bolted Joints, V002T02A006, July 14–19, 2019
Paper No: PVP2019-93237
DOI: https://doi.org/10.1115/PVP2019-93237
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Topics: Simulation, Welding
Proceedings Papers

Simplified SCC Simulation Considering Growth Arrest at Fusion Line of Weld

Hiroshi Okada, Masayuki Kamaya, Yasunori Yusa
Proc. ASME. PVP2019, Volume 2: Computer Technology and Bolted Joints, V002T02A007, July 14–19, 2019
Paper No: PVP2019-93516
DOI: https://doi.org/10.1115/PVP2019-93516
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Topics: Simulation, Crack propagation, Fracture (Materials), Metals, Shapes, Computer software, Finite element analysis, Modeling, Stress, Stress corrosion cracking
Proceedings Papers

Formulation of Three-Dimensional J-Integral for Finite Strain Elastic-Plastic Fracture Problems Under Any Load Histories (Monotonic and Cyclic Loads)

Koichiro Arai, Hiroshi Okada, Yasunori Yusa
Proc. ASME. PVP2018, Volume 2: Computer Technology and Bolted Joints, V002T02A005, July 15–20, 2018
Paper No: PVP2018-84241
DOI: https://doi.org/10.1115/PVP2018-84241
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Topics: Fracture (Materials), Stress, Deformation, Computational methods, Energy dissipation, Surface cracks
Proceedings Papers

SCC Propagation Analyses in a Welded Joint Under Various Assumed Residual Stresses and Anisotropic SCC Propagation Law

Hiroshi Okada, Manabu Kikuchi, Masahiro Ono, Yasunori Yusa, Masayuki Kamaya
Proc. ASME. PVP2018, Volume 2: Computer Technology and Bolted Joints, V002T02A010, July 15–20, 2018
Paper No: PVP2018-84238
DOI: https://doi.org/10.1115/PVP2018-84238
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Topics: Anisotropy, Residual stresses, Welded joints, Metals, Pressurized water reactors, Stress, Engineering simulation, Finite element methods, Mechanical properties, Mesh generation
Journal Articles

Development of Stress Intensity Factors for Surface Cracks With Large Aspect Ratio in Plates

Yinsheng Li, Kunio Hasegawa, Genshichiro Katsumata, Kazuya Osakabe, Hiroshi Okada
Journal: Journal of Pressure Vessel Technology
Article Type: Research-Article
J. Pressure Vessel Technol. October 2015, 137(5): 051207.
Paper No: PVT-14-1180
DOI: https://doi.org/10.1115/1.4030026
Published Online: October 1, 2015
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Topics: Fracture (Materials), Surface cracks, Finite element analysis, Stress, Plates (structures)
Proceedings Papers

Development of an Automatic 3D Finite Element Crack Propagation System

Hiroaki Doi, Hitoshi Nakamura, Wenwei Gu, Hiroshi Okada
Proc. ASME. PVP2014, Volume 1: Codes and Standards, V001T01A094, July 20–24, 2014
Paper No: PVP2014-28394
DOI: https://doi.org/10.1115/PVP2014-28394
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Topics: Crack propagation, Finite element analysis, Fracture (Materials), Computer software, Finite element methods, Finite element model, Generators, Nuclear power stations, Approximation, ASME Standards
Proceedings Papers

Stress Intensity Factors for Cracks With Large Aspect Ratio in Cylinder

Yinsheng Li, Hiroaki Doi, Kunio Hasegawa, Kazuya Osakabe, Hiroshi Okada
Proc. ASME. PVP2013, Volume 1B: Codes and Standards, V01BT01A037, July 14–18, 2013
Paper No: PVP2013-97665
DOI: https://doi.org/10.1115/PVP2013-97665
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Topics: Cylinders, Fracture (Materials), Stress, Surface cracks, Nuclear power stations, Wall thickness, ASME Boiler and Pressure Vessel Code, Dimensions, Fitness-for-service, Flat plates
Proceedings Papers

Fully Automated SCC and Fatigue Crack Propagation Analyses on Deep Semi-Elliptical Flaws

Kota Sugawara, Hirohito Koya, Hiroshi Okada, Yinsheng Li, Kazuya Osakabe, Hiroshi Kawai
Proc. ASME. PVP2013, Volume 1B: Codes and Standards, V01BT01A038, July 14–18, 2013
Paper No: PVP2013-97678
DOI: https://doi.org/10.1115/PVP2013-97678
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Topics: Fatigue cracks, Crack propagation, Fracture (Materials), Stress, Finite element analysis, Shapes, Anisotropy, Computation, Computer software, Finite element model
Proceedings Papers

Development of the Next-Generation Computational Fracture Mechanics Simulator on the Earth Simulator 2

Kaworu Yodo, Hiroshi Kawai, Hiroshi Okada, Masao Ogino, Ryuji Shioya
Proc. ASME. IDETC-CIE2012, Volume 2: 32nd Computers and Information in Engineering Conference, Parts A and B, 973-979, August 12–15, 2012
Paper No: DETC2012-70909
DOI: https://doi.org/10.1115/DETC2012-70909
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Topics: Fracture mechanics, Fracture (Materials), Finite element analysis, Crack propagation, Shapes, Stress, Structural analysis, Aircraft, Computer software, Computer-aided engineering
Proceedings Papers

Computations of Stress Intensity Factors for Deep Cracks in Plates by Using the Tetrahedral Finite Element

Hiroshi Okada, Hirohito Koya, Hiroshi Kawai, Yinsheng Li
Proc. ASME. PVP2012, Volume 1: Codes and Standards, 687-694, July 15–19, 2012
Paper No: PVP2012-78580
DOI: https://doi.org/10.1115/PVP2012-78580
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Topics: Computation, Finite element analysis, Fracture (Materials), Plates (structures), Stress, Residual stresses, Finite element methods, Finite element model, Mesh generation, Stress corrosion cracking
Proceedings Papers

Development of Stress Intensity Factors for Deep Surface Cracks in Plates and Cylinders

Yinsheng Li, Hiroto Itoh, Kunio Hasegawa, Kazuya Osakabe, Hiroshi Okada
Proc. ASME. PVP2012, Volume 1: Codes and Standards, 637-649, July 15–19, 2012
Paper No: PVP2012-78109
DOI: https://doi.org/10.1115/PVP2012-78109
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Topics: Cylinders, Plates (structures), Stress, Surface cracks, Fracture (Materials), Finite element analysis, Nuclear power stations, ASME Boiler and Pressure Vessel Code, Dimensions, Engineering systems and industry applications
Proceedings Papers

On Mixed Mode Crack Propagation Analysis Based on VCCM (Virtual Crack Closure-Integral Method) for Tetrahedral Finite Element

Hiroshi Okada, Hiroshi Kawai, Takashi Tokuda, Yasuyoshi Fukui
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 1, 433-442, July 18–22, 2010
Paper No: PVP2010-25527
DOI: https://doi.org/10.1115/PVP2010-25527
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Topics: Crack propagation, Finite element analysis, Fracture (Materials), Mesh generation, Solids
Proceedings Papers

Particulate Emissions From a Two-Stroke Marine Diesel Engine Operated With Heavy Fuel Oil

Tatsuro Tsukamoto, Kenji Ohe, Hiroshi Okada
Proc. ASME. ICEF2002, Design, Application, Performance and Emissions of Modern Internal Combustion Engine Systems and Components, 241-245, September 8–11, 2002
Paper No: ICEF2002-503
DOI: https://doi.org/10.1115/ICEF2002-503
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Topics: Diesel engines, Emissions, Fuel oils, Particulate matter