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Asao Okamoto
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Proceedings Papers

Verification of Alternative Criteria for Shakedown Evaluation Using 2-Dimensional and 3-Dimensional Nozzle Models

Seiji Asada, Asao Okamoto, Isoharu Nishiguchi
Proc. ASME. PVP2002, Pressure Vessel and Piping Codes and Standards, 23-29, August 5–9, 2002
Publisher: American Society of Mechanical Engineers
Paper No: PVP2002-1218
https://doi.org/10.1115/PVP2002-1218
View Paper titled, Verification of Alternative Criteria for Shakedown Evaluation Using 2-Dimensional and 3-Dimensional Nozzle Models
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Topics: Nozzles, Finite element analysis, Stress, Shells, Thermal stresses, Three-dimensional models
Proceedings Papers

Verification of Alternative Criteria for Shakedown Evaluation Using Flat Head Vessel

Seiji Asada, Norimichi Yamashita, Asao Okamoto, Isoharu Nishiguchi
Proc. ASME. PVP2002, Pressure Vessel and Piping Codes and Standards, 17-22, August 5–9, 2002
Publisher: American Society of Mechanical Engineers
Paper No: PVP2002-1217
https://doi.org/10.1115/PVP2002-1217
View Paper titled, Verification of Alternative Criteria for Shakedown Evaluation Using Flat Head Vessel
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Topics: Vessels, Finite element analysis, Stress, Cycles, Evaluation methods, Pressure, Shells, Thermal stresses
Proceedings Papers

Analytical and Numerical Evaluation of the Cyclic Yield Area Criteria for Shakedown Requirements

Isoharu Nishiguchi, Asao Okamoto, Norimichi Yamashita, Mitsuru Aoki
Proc. ASME. PVP2002, Pressure Vessel and Piping Codes and Standards, 39-46, August 5–9, 2002
Publisher: American Society of Mechanical Engineers
Paper No: PVP2002-1220
https://doi.org/10.1115/PVP2002-1220
View Paper titled, Analytical and Numerical Evaluation of the Cyclic Yield Area Criteria for Shakedown Requirements
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Topics: ASME Boiler and Pressure Vessel Code, Elastic analysis, Failure mechanisms, Finite element methods, Finite element model, Stress, Stress analysis (Engineering)
Proceedings Papers

Evaluation Criteria for Alternating Loads Based on Partial Inelastic Analyses

Asao Okamoto, Yasuhiro Ohtake, Norimichi Yamashita
Proc. ASME. PVP2002, Pressure Vessel and Piping Codes and Standards, 57-64, August 5–9, 2002
Publisher: American Society of Mechanical Engineers
Paper No: PVP2002-1222
https://doi.org/10.1115/PVP2002-1222
View Paper titled, Evaluation Criteria for Alternating Loads Based on Partial Inelastic Analyses
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Topics: Inelastic analysis, Stress, Collapse, Finite element analysis, Design, Elastic analysis, Evaluation methods, Stress analysis (Engineering)
Proceedings Papers

Effects of Peak Strain on Collapse Load Assessment

Asao Okamoto, Yasuhiro Ohtake, Isoharu Nishiguchi, Mitsuru Aoki
Proc. ASME. PVP2003, Pressure Vessel and Piping Codes and Standards, 3-10, July 20–24, 2003
Publisher: American Society of Mechanical Engineers
Paper No: PVP2003-1765
https://doi.org/10.1115/PVP2003-1765
View Paper titled, Effects of Peak Strain on Collapse Load Assessment
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Topics: Collapse, Stress, Displacement, Finite element analysis, Disks, Hinges, Modeling, Plastics, Shapes
Proceedings Papers

Application of Shell Elements to Collapse Load Analysis

Seiji Asada, Asao Okamoto, Isoharu Nishiguchi, Mitsuru Aoki
Proc. ASME. PVP2003, Pressure Vessel and Piping Codes and Standards, 61-68, July 20–24, 2003
Publisher: American Society of Mechanical Engineers
Paper No: PVP2003-1771
https://doi.org/10.1115/PVP2003-1771
View Paper titled, Application of Shell Elements to Collapse Load Analysis
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Topics: Collapse, Shells, Stress, Finite element analysis, Shapes, Surveying, Vessels
Proceedings Papers

Technical Bases for Alternative Stress Evaluation Criteria in Japan Based on Partial Inelastic Analyses

Seiji Asada, Asao Okamoto, Isoharu Nishiguchi, Mitsuru Aoki, Yasuhide Asada
Proc. ASME. PVP2004, Elevated Temperature Design and Analysis, Nonlinear Analysis, and Plastic Components, 85-92, July 25–29, 2004
Publisher: American Society of Mechanical Engineers
Paper No: PVP2004-2263
https://doi.org/10.1115/PVP2004-2263
View Paper titled, Technical Bases for Alternative Stress Evaluation Criteria in Japan Based on Partial Inelastic Analyses
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Topics: Inelastic analysis, Stress, Fatigue, Collapse, Finite element analysis
Journal Articles

Simplified Elastic-Plastic Analysis Method Using K e Factors Obtained for the Real Structural Model

Asao Okamoto, Yasuhiro Ohtake
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Technical Papers
J. Pressure Vessel Technol. February 2003, 125(1): 59–64.
https://doi.org/10.1115/1.1522416
Published Online: January 31, 2003
View Article titled, Simplified Elastic-Plastic Analysis Method Using K e Factors Obtained for the Real Structural Model
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Topics: ASME Standards, Design, Finite element analysis, Nozzles, Stress, Cycles, Yield point, Structural elements (Construction), Thermal stresses, Stress-strain curves