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Koichi Saito
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Proceedings Papers

Prediction of Collapse Load Reduction due to Non-Aligned Multiple Flaws

Fuminori Iwamatsu, Katsumasa Miyazaki, Koichi Saito
Proc. ASME. PVP2020, Volume 1: Codes and Standards, V001T01A055, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21806
https://doi.org/10.1115/PVP2020-21806
View Paper titled, Prediction of Collapse Load Reduction due to Non-Aligned Multiple Flaws
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Topics: Collapse, Stress, Fracture (Materials), Fracture (Process), Finite element analysis, Fitness-for-service, Ductile fracture, Flat plates, ASME Boiler and Pressure Vessel Code, Boilers
Proceedings Papers

Limit Load Solution of Non-Aligned Multiple Flaws

Fuminori Iwamatsu, Katsumasa Miyazaki, Koichi Saito
Proc. ASME. PVP2018, Volume 1A: Codes and Standards, V01AT01A008, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84809
https://doi.org/10.1115/PVP2018-84809
View Paper titled, Limit Load Solution of Non-Aligned Multiple Flaws
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Topics: Stress, Collapse, Finite element analysis, Fracture (Materials), Fracture (Process), Power stations, Boilers, Evaluation methods, Experimental methods, Fitness-for-service
Proceedings Papers

Fracture Tests of Flat Plate and Pipe With Non-Aligned Multiple Flaws

Fuminori Iwamatsu, Katsumasa Miyazaki, Koichi Saito
Proc. ASME. PVP2017, Volume 1A: Codes and Standards, V01AT01A008, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-66169
https://doi.org/10.1115/PVP2017-66169
View Paper titled, Fracture Tests of Flat Plate and Pipe With Non-Aligned Multiple Flaws
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Topics: Flat plates, Fracture (Materials), Fracture (Process), Pipes, Ductile fracture, Stress, Evaluation methods, Boilers, Collapse, Displacement
Journal Articles

Study on Flaw-to-Surface Proximity Rule for Transforming Subsurface Flaws to Surface Flaws Based on Fatigue Crack Growth Experiments

Kunio Hasegawa, Yinsheng Li, Koichi Saito
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. August 2015, 137(4): 041101.
Paper No: PVT-14-1092
https://doi.org/10.1115/1.4028423
Published Online: August 1, 2015
View Article titled, Study on Flaw-to-Surface Proximity Rule for Transforming Subsurface Flaws to Surface Flaws Based on Fatigue Crack Growth Experiments
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Topics: Fatigue cracks, Cycles
Proceedings Papers

Simplified Limit Load Analysis for Multiple Circumferential Flaws in a Pipe

Fuminori Iwamatsu, Koichi Saito
Proc. ASME. PVP2014, Volume 1: Codes and Standards, V001T01A059, July 20–24, 2014
Publisher: American Society of Mechanical Engineers
Paper No: PVP2014-28568
https://doi.org/10.1115/PVP2014-28568
View Paper titled, Simplified Limit Load Analysis for Multiple Circumferential Flaws in a Pipe
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Topics: Pipes, Stress, Bending (Stress), Collapse, ASME Boiler and Pressure Vessel Code, Fitness-for-service, Stress corrosion cracking
Proceedings Papers

Evaluation Procedure of Limit Load for Non-Aligned Multiple Flaws

Fuminori Iwamatsu, Katsumasa Miyazaki, Hidekazu Takazawa, Koichi Saito
Proc. ASME. PVP2013, Volume 1A: Codes and Standards, V01AT01A062, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97466
https://doi.org/10.1115/PVP2013-97466
View Paper titled, Evaluation Procedure of Limit Load for Non-Aligned Multiple Flaws
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Topics: Stress, Collapse, Fracture (Materials), Fracture (Process), ASME Boiler and Pressure Vessel Code, Ductile fracture, Fitness-for-service, Flat plates
Proceedings Papers

Fatigue Crack Growth for Subsurface Flaws Near Component Surface and Proximity Rules

Kunio Hasegawa, Yinsheng Li, Katsumasa Miyazaki, Koichi Saito
Proc. ASME. PVP2013, Volume 1A: Codes and Standards, V01AT01A063, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97559
https://doi.org/10.1115/PVP2013-97559
View Paper titled, Fatigue Crack Growth for Subsurface Flaws Near Component Surface and Proximity Rules
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Topics: Fatigue cracks, Fitness-for-service, ASME Standards, Carbon steel, Flat plates, Japan Society of Mechanical Engineers, Temperature
Proceedings Papers

Creep Property Evaluation for Stress Mitigation Simulation in Post Weld Heat Treatment

Nobuyoshi Yanagida, Koichi Saito
Proc. ASME. PVP2013, Volume 6B: Materials and Fabrication, V06BT06A077, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97554
https://doi.org/10.1115/PVP2013-97554
View Paper titled, Creep Property Evaluation for Stress Mitigation Simulation in Post Weld Heat Treatment
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Topics: Creep, Heat treating (Metalworking), Simulation, Stress, Relaxation (Physics), Alloy steel, Alloys, Base metals, Metals, Nickel
Proceedings Papers

Comparison of Experiment and Calculation on Fatigue Crack Growth for Transformed Surface Flaw

Kunio Hasegawa, Yinsheng Li, Katsumasa Miyazaki, Koichi Saito
Proc. ASME. PVP2012, Volume 1: Codes and Standards, 369-372, July 15–19, 2012
Publisher: American Society of Mechanical Engineers
Paper No: PVP2012-78688
https://doi.org/10.1115/PVP2012-78688
View Paper titled, Comparison of Experiment and Calculation on Fatigue Crack Growth for Transformed Surface Flaw
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Topics: Fatigue cracks, Fitness-for-service, ASME Standards, Carbon steel, Flat plates, Japan Society of Mechanical Engineers, Temperature
Proceedings Papers

Effect of Flaw Dimensions on Ductile Fracture Behavior of Non-Aligned Multiple Flaws in a Plate

Katsumasa Miyazaki, Kunio Hasegawa, Koichi Saito
Proc. ASME. PVP2011, Volume 1: Codes and Standards, 459-465, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57559
https://doi.org/10.1115/PVP2011-57559
View Paper titled, Effect of Flaw Dimensions on Ductile Fracture Behavior of Non-Aligned Multiple Flaws in a Plate
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Topics: Dimensions, Ductile fracture, Fracture (Materials), Fracture (Process), Fitness-for-service, Flat plates, Stress
Proceedings Papers

Plastic Collapse Loads for Flat Plates With Dissimilar Non-Aligned Through-Wall Cracks

Kunio Hasegawa, Katsumasa Miyazaki, Koichi Saito
Proc. ASME. PVP2011, Volume 1: Codes and Standards, 475-479, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57841
https://doi.org/10.1115/PVP2011-57841
View Paper titled, Plastic Collapse Loads for Flat Plates With Dissimilar Non-Aligned Through-Wall Cracks
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Topics: Collapse, Flat plates, Fracture (Materials), Stress, Dimensions, Fitness-for-service, Stainless steel, Temperature
Proceedings Papers

Fracture Assessment of Pipes Having Multiple Flaws Based on Ramberg–Osgood-Type Stress–Strain Relationships

Hideo Machida, Tetsuya Hamanaka, Yoshiaki Takahashi, Katsumasa Miyazaki, Fuminori Iwamatsu, Koichi Saito, Masao Itatani, Chihiro Narazaki, Kiminobu Hojo
Proc. ASME. PVP2011, Volume 1: Codes and Standards, 487-493, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57859
https://doi.org/10.1115/PVP2011-57859
View Paper titled, Fracture Assessment of Pipes Having Multiple Flaws Based on Ramberg–Osgood-Type Stress–Strain Relationships
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Topics: Fracture (Materials), Pipes, Stress-strain relations, Fracture toughness, Stress, Stress concentration, Fitness-for-service, Flow (Dynamics), Stress-strain curves, Ductility
Proceedings Papers

Experimental Study on the Flaw Characterization of Multiple Flaws for Ductile Fracture

Fuminori Iwamatsu, Katsumasa Miyazaki, Koichi Saito, Tetsuya Hamanaka, Yoshiaki Takahashi
Proc. ASME. PVP2011, Volume 1: Codes and Standards, 495-501, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57875
https://doi.org/10.1115/PVP2011-57875
View Paper titled, Experimental Study on the Flaw Characterization of Multiple Flaws for Ductile Fracture
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Topics: Ductile fracture, Flat plates, Fitness-for-service, Fracture (Materials), Fracture (Process), Machinery, Collapse, Electric discharge, Stainless steel, Stress
Proceedings Papers

Estimation of Maximum Load for Pipes With Multiple Circumferential Flaws by Limit Load Analysis

Fuminori Iwamatsu, Katsumasa Miyazaki, Koichi Saito, Tetsuya Hamanaka, Yoshiaki Takahashi
Proc. ASME. PVP2011, Volume 1: Codes and Standards, 503-510, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57876
https://doi.org/10.1115/PVP2011-57876
View Paper titled, Estimation of Maximum Load for Pipes With Multiple Circumferential Flaws by Limit Load Analysis
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Topics: Pipes, Stress, Flow (Dynamics), Japan Society of Mechanical Engineers, ASME Standards, Failure, Stainless steel, Stress corrosion cracking
Proceedings Papers

Residual Stress Analysis of Bead Welded Low Alloy Steel Plate Specimens Subjected to Post Weld Heat Treatment

Nobuyoshi Yanagida, Koichi Saito
Proc. ASME. PVP2011, Volume 6: Materials and Fabrication, Parts A and B, 1421-1428, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57054
https://doi.org/10.1115/PVP2011-57054
View Paper titled, Residual Stress Analysis of Bead Welded Low Alloy Steel Plate Specimens Subjected to Post Weld Heat Treatment
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Topics: Alloy steel, Heat treating (Metalworking), Stress analysis (Engineering), Stress, Welding, Creep, Phase transitions, ASTM International, Finite element analysis, Heat
Proceedings Papers

Behavior of Plastic Collapse Moments for Pipes With Two Non-Aligned Flaws

Kunio Hasegawa, Katumasa Miyazaki, Koichi Saito
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 1, 355-361, July 18–22, 2010
Publisher: American Society of Mechanical Engineers
Paper No: PVP2010-25199
https://doi.org/10.1115/PVP2010-25199
View Paper titled, Behavior of Plastic Collapse Moments for Pipes With Two Non-Aligned Flaws
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Topics: Collapse, Pipes, Stress, Exterior walls, Failure, Fitness-for-service, Shapes, Stainless steel, Temperature
Proceedings Papers

Ductile Fracture Strength of Ni-Based Alloy With an Inch Thickness

Katsumasa Miyazaki, Koichi Saito
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 1, 953-958, July 18–22, 2010
Publisher: American Society of Mechanical Engineers
Paper No: PVP2010-26120
https://doi.org/10.1115/PVP2010-26120
View Paper titled, Ductile Fracture Strength of Ni-Based Alloy With an Inch Thickness
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Topics: Alloys, Ductile fracture, Stress, Fracture (Materials), Fracture (Process), Flat plates, Base metals, Failure, Finite element analysis, Metals
Proceedings Papers

Finite Element Analyses of Residual Stresses in Typical Welded Joints Used in Nuclear Power Plants and Comparisons With Experiments

Dean Deng, Kazuo Ogawa, Nobuyoshi Yanagida, Koichi Saito
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 1, 885-896, July 18–22, 2010
Publisher: American Society of Mechanical Engineers
Paper No: PVP2010-25321
https://doi.org/10.1115/PVP2010-25321
View Paper titled, Finite Element Analyses of Residual Stresses in Typical Welded Joints Used in Nuclear Power Plants and Comparisons With Experiments
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Topics: Computer simulation, Finite element analysis, Nuclear power stations, Residual stresses, Stress, Stress corrosion cracking, Welded joints, Welding, Metals, Boiling water reactors
Proceedings Papers

Study on Residual-Stress Redistributions During the Process of Manufacture of a Vessel Penetration Set-On Joint

Nobuyoshi Yanagida, Kazuo Ogawa, Koichi Saito, Ed Kingston
Proc. ASME. PVP2009, Volume 6: Materials and Fabrication, Parts A and B, 435-447, July 26–30, 2009
Publisher: American Society of Mechanical Engineers
Paper No: PVP2009-77408
https://doi.org/10.1115/PVP2009-77408
View Paper titled, Study on Residual-Stress Redistributions During the Process of Manufacture of a Vessel Penetration Set-On Joint
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Topics: Stress, Vessels, Alloys, Steel, Boiling water reactors, Cladding systems (Building), Finite element analysis, Creep, Drilling, Heat treating (Metalworking)
Proceedings Papers

Evaluation of Alignment Rules Using Stainless Steel Pipes With Non-Aligned Flaws

Kunio Hasegawa, Katsumasa Miyazaki, Koichi Saito, Bostjan Bezensek
Proc. ASME. PVP2009, Volume 1: Codes and Standards, 173-180, July 26–30, 2009
Publisher: American Society of Mechanical Engineers
Paper No: PVP2009-77068
https://doi.org/10.1115/PVP2009-77068
View Paper titled, Evaluation of Alignment Rules Using Stainless Steel Pipes With Non-Aligned Flaws
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Topics: Pipes, Stainless steel, Stress, Collapse, American Petroleum Institute, Fitness-for-service, Japan Society of Mechanical Engineers, Stress corrosion cracking