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Proceedings Papers

Research on Effects of Surface Finishing and Mean Stress on Fatigue Lives of Notched Specimens: Test Plan and Summary of Outcomes

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Seiji Asada, Akihiko Hirano, Masao Itatani, Yoshihide Kitamura, Takeshi Ogawa
Proc. ASME. PVP2024, Volume 2: Design & Analysis, V002T03A038, July 28–August 2, 2024
Publisher: American Society of Mechanical Engineers
Paper No: PVP2024-121251
https://doi.org/10.1115/PVP2024-121251
View Paper titled, Research on Effects of Surface Finishing and Mean Stress on Fatigue Lives of Notched Specimens: Test Plan and Summary of Outcomes
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Topics: Fatigue, Performance, Stress, Stress concentration, Surface finishing
Proceedings Papers

Research on Effects of Surface Finishing and Mean Stress on Fatigue Lives of Notched Specimens - Definition of Fatigue Life of Notched Specimen Using Crack Growth Analysis

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Masao Itatani, Takuya Ogawa, Masahiro Takanashi, Yun Wang, Yuichiro Nomura, Yoshihide Kitamura
Proc. ASME. PVP2024, Volume 2: Design & Analysis, V002T03A045, July 28–August 2, 2024
Publisher: American Society of Mechanical Engineers
Paper No: PVP2024-123111
https://doi.org/10.1115/PVP2024-123111
View Paper titled, Research on Effects of Surface Finishing and Mean Stress on Fatigue Lives of Notched Specimens - Definition of Fatigue Life of Notched Specimen Using Crack Growth Analysis
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Topics: Alloys, Carbon steel, Fatigue, Fatigue cracks, Fatigue life, Finishes, Fracture (Materials), Steel, Stress, Stress concentration
Proceedings Papers

Study on the Applicability of GTN Model on Fracture Evaluation for Plate Specimen With a Surface Crack Using a BWR Reactor Pressure Vessel Material

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Takuya Ogawa, Takahiro Hayashi, Shuichi Yoshida, Masao Itatani, Toshiyuki Saito
Proc. ASME. PVP2023, Volume 5: Materials & Fabrication, V005T06A062, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-107208
https://doi.org/10.1115/PVP2023-107208
View Paper titled, Study on the Applicability of GTN Model on Fracture Evaluation for Plate Specimen With a Surface Crack Using a BWR Reactor Pressure Vessel Material
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Topics: Alloys, Boiling water reactors, Damage mechanics, Fracture (Materials), Fracture mechanics, Reactor vessels, Stress corrosion cracking, Surface cracks
Proceedings Papers

Investigation of Surface Finish Effect on Fatigue Strength of Carbon and Low Alloy Steels

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Seiji Asada, Akihiko Hirano, Yun Wang, Masao Itatani, Masahiro Takanashi, Yuichiro Nomura, Fumihiro Ochi, Takeshi Ogawa
Proc. ASME. PVP2022, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A041, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-84695
https://doi.org/10.1115/PVP2022-84695
View Paper titled, Investigation of Surface Finish Effect on Fatigue Strength of Carbon and Low Alloy Steels
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Topics: Alloy steel, Carbon, Design, Fatigue, Fatigue strength, Finishes
Proceedings Papers

Study on Ductile Crack Extension and Fracture Behavior in Plate Specimen With a Semi-Elliptical Surface Crack Using a BWR Reactor Pressure Vessel Material

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Takahiro Hayashi, Takuya Ogawa, Shuichi Yoshida, Masao Itatani, Toshiyuki Saito
Proc. ASME. PVP2022, Volume 4B: Materials and Fabrication, V04BT06A020, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-84606
https://doi.org/10.1115/PVP2022-84606
View Paper titled, Study on Ductile Crack Extension and Fracture Behavior in Plate Specimen With a Semi-Elliptical Surface Crack Using a BWR Reactor Pressure Vessel Material
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Topics: Boiling water reactors, Ductile fracture, Fracture (Materials), Fracture (Process), Fracture mechanics, Metals, Reactor vessels, Stress corrosion cracking, Surface cracks
Proceedings Papers

Study on Fracture Behavior and Assessment for Dissimilar Metal Weld of Low Alloy Steel and Ni-Base Alloy Weld Using a BWR Reactor Pressure Vessel Material

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Takahiro Hayashi, Takuya Ogawa, Shuichi Yoshida, Masao Itatani, Yasuhiro Hattori, Tetsushi Yamaoka, Shigeaki Tanaka, Toshiyuki Saito
Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A047, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-61467
https://doi.org/10.1115/PVP2021-61467
View Paper titled, Study on Fracture Behavior and Assessment for Dissimilar Metal Weld of Low Alloy Steel and Ni-Base Alloy Weld Using a BWR Reactor Pressure Vessel Material
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Topics: Alloy steel, Alloys, Boiling water reactors, Fracture (Materials), Fracture mechanics, Fracture toughness, Metals, Reactor vessels, Stress corrosion cracking
Proceedings Papers

SCC Growth Prediction for Surface Crack in Welded Joint Using Advanced FEA

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Takuya Ogawa, Masao Itatani, Takahiro Hayashi, Toshiyuki Saito
Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A080, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21670
https://doi.org/10.1115/PVP2020-21670
View Paper titled, SCC Growth Prediction for Surface Crack in Welded Joint Using Advanced FEA
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Topics: Finite element analysis, Surface cracks, Welded joints, Fracture (Materials), Fracture (Process), Shapes, Fitness-for-service, Metals, Stainless steel, Base metals
Proceedings Papers

SCC Crack Growth Analysis for a Dissimilar Metal Weld Using Advanced FEA

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Takuya Ogawa, Masao Itatani, Takahiro Hayashi, Toshiyuki Saito
Proc. ASME. PVP2018, Volume 6A: Materials and Fabrication, V06AT06A001, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84513
https://doi.org/10.1115/PVP2018-84513
View Paper titled, SCC Crack Growth Analysis for a Dissimilar Metal Weld Using Advanced FEA
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Topics: Finite element analysis, Fracture (Materials), Metals, Boiling water reactors, Fitness-for-service, Japan Society of Mechanical Engineers, Pressurized water reactors, Stress corrosion cracking, Anisotropy, Finite element model
Proceedings Papers

Proposal of Common Rules for Fatigue Crack Growth Law of the JSME Rules on Fitness-for-Service

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Kiminobu Hojo, Masao Itatani, Taku Arai
Proc. ASME. PVP2015, Volume 1A: Codes and Standards, V01AT01A035, July 19–23, 2015
Publisher: American Society of Mechanical Engineers
Paper No: PVP2015-45355
https://doi.org/10.1115/PVP2015-45355
View Paper titled, Proposal of Common Rules for Fatigue Crack Growth Law of the JSME Rules on Fitness-for-Service
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Topics: Fatigue cracks, Fitness-for-service, Japan Society of Mechanical Engineers, Fracture (Materials), JSME Standards, Pressurized water reactors
Proceedings Papers

Evaluation of Crack Growth of Ni-Base Alloys Under Long Term Cyclic Loading in BWR Environment

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Masao Itatani, Takuya Ogawa
Proc. ASME. PVP2015, Volume 1A: Codes and Standards, V01AT01A036, July 19–23, 2015
Publisher: American Society of Mechanical Engineers
Paper No: PVP2015-45458
https://doi.org/10.1115/PVP2015-45458
View Paper titled, Evaluation of Crack Growth of Ni-Base Alloys Under Long Term Cyclic Loading in BWR Environment
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Topics: Alloys, Boiling water reactors, Fracture (Materials), Stress, Base metals, Fatigue, Fatigue cracks, Metals, Heat, Stainless steel
Proceedings Papers

Study on the Failure Assessment of Small Diameter Pipe With Circumferential Crack Under Monotonic and Cyclic Multi-Axial Loading

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Masao Itatani, Toshiyuki Saito, Yoshiaki Akiniwa, Keita Naito
Proc. ASME. PVP2014, Volume 6A: Materials and Fabrication, V06AT06A012, July 20–24, 2014
Publisher: American Society of Mechanical Engineers
Paper No: PVP2014-28386
https://doi.org/10.1115/PVP2014-28386
View Paper titled, Study on the Failure Assessment of Small Diameter Pipe With Circumferential Crack Under Monotonic and Cyclic Multi-Axial Loading
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Topics: Failure, Fracture (Materials), Pipes, Stress, Torque, Carbon steel, Flow (Dynamics)
Proceedings Papers

Revision of Flaw Evaluation Methods of Pipes Having a Circumferential Flaw in JSME Fitness-for-Service Codes

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Hideo Machida, Masao Itatani, Masayuki Kamaya
Proc. ASME. PVP2014, Volume 1: Codes and Standards, V001T01A099, July 20–24, 2014
Publisher: American Society of Mechanical Engineers
Paper No: PVP2014-29053
https://doi.org/10.1115/PVP2014-29053
View Paper titled, Revision of Flaw Evaluation Methods of Pipes Having a Circumferential Flaw in JSME Fitness-for-Service Codes
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Topics: Evaluation methods, Fitness-for-service, Japan Society of Mechanical Engineers, Pipes, Fracture (Materials), Stress, Design, Collapse, Deformation, Flow (Dynamics)
Proceedings Papers

Technical Basis of Fatigue Crack Growth Rate Curve for Ni-Base Alloy in BWR Water Environment

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Takuya Ogawa, Masao Itatani, Toshiyuki Saito, Hiroshi Nagase, Satoru Aoike, Hideki Yoneda
Proc. ASME. ICONE22, Volume 1: Plant Operations, Maintenance, Engineering, Modifications, Life Cycle and Balance of Plant; Nuclear Fuel and Materials; Plant Systems, Structures and Components; Codes, Standards, Licensing and Regulatory Issues, V001T07A017, July 7–11, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ICONE22-31143
https://doi.org/10.1115/ICONE22-31143
View Paper titled, Technical Basis of Fatigue Crack Growth Rate Curve for Ni-Base Alloy in BWR Water Environment
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Topics: Alloys, Boiling water reactors, Fatigue cracks, Water, Stress, Fitness-for-service, Corrosion, Fracture (Materials), Japan Society of Mechanical Engineers, ASTM International
Proceedings Papers

Plan and Status of Development of Design Fatigue Curves: Phase 1

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Seiji Asada, Akihiko Hirano, Masao Itatani, Munehiro Yasuda, Takehiko Sera, Hideo Kobayashi
Proc. ASME. PVP2013, Volume 1A: Codes and Standards, V01AT01A026, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97767
https://doi.org/10.1115/PVP2013-97767
View Paper titled, Plan and Status of Development of Design Fatigue Curves: Phase 1
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Topics: Design, Fatigue, Alloy steel, Carbon steel, Nuclear power, Stainless steel, Welding
Proceedings Papers

Development of Load Multipliers (Z-Factors) in Elastic-Plastic Fracture Mechanics Evaluation in Rules on Fitness-for-Service for Nuclear Power Plants

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Seiji Asada, Masao Itatani, Naoki Miura, Hideo Machida
Proc. ASME. PVP2012, Volume 1: Codes and Standards, 773-781, July 15–19, 2012
Publisher: American Society of Mechanical Engineers
Paper No: PVP2012-78021
https://doi.org/10.1115/PVP2012-78021
View Paper titled, Development of Load Multipliers (Z-Factors) in Elastic-Plastic Fracture Mechanics Evaluation in Rules on Fitness-for-Service for Nuclear Power Plants
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Topics: Fitness-for-service, Fracture mechanics, Nuclear power stations, Stress, Pipes, Stainless steel, Steel, Boilers, Fracture (Materials), Fracture (Process)
Proceedings Papers

Re-Evaluation of Fatigue Crack Growth Curve for Austenitic Stainless Steels in BWR Environment

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Masao Itatani, Takuya Ogawa, Chihiro Narazaki, Toshiyuki Saito
Proc. ASME. PVP2012, Volume 1: Codes and Standards, 631-636, July 15–19, 2012
Publisher: American Society of Mechanical Engineers
Paper No: PVP2012-78026
https://doi.org/10.1115/PVP2012-78026
View Paper titled, Re-Evaluation of Fatigue Crack Growth Curve for Austenitic Stainless Steels in BWR Environment
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Topics: Boiling water reactors, Fatigue cracks, Stainless steel, JSME Standards, Pressurized water reactors, Steel, Alloys, ASME Boiler and Pressure Vessel Code, Fitness-for-service, Fracture (Materials)
Proceedings Papers

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

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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

Technical Basis of Fatigue Crack Growth Rate Curve for Ni-Base Alloy Weld Metal in Air Environment

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Takuya Ogawa, Chihiro Narazaki, Masao Itatani, Akihiko Hirano, Hiroshi Nagase, Hideki Yoneda
Proc. ASME. PVP2011, Volume 1: Codes and Standards, 875-882, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57219
https://doi.org/10.1115/PVP2011-57219
View Paper titled, Technical Basis of Fatigue Crack Growth Rate Curve for Ni-Base Alloy Weld Metal in Air Environment
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Topics: Alloys, Fatigue cracks, Metals, Fitness-for-service, Boiling water reactors, Japan Society of Mechanical Engineers, Maintenance, Stress, Temperature, Fracture (Materials)
Proceedings Papers

Fatigue Behavior of Circumferentially Notched Round Bars of Austenitic Stainless Steel Under Torsional and Axial Loads

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Masao Itatani, Keisuke Tanaka, Isao Ohkawa, Takehisa Yamada, Toshiyuki Saito
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 1, 423-431, July 18–22, 2010
Publisher: American Society of Mechanical Engineers
Paper No: PVP2010-25472
https://doi.org/10.1115/PVP2010-25472
View Paper titled, Fatigue Behavior of Circumferentially Notched Round Bars of Austenitic Stainless Steel Under Torsional and Axial Loads
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Topics: Fatigue, Stainless steel, Stress, Stress concentration, Tension, Torsion, Fatigue life, Fracture (Materials), Crack propagation, Electric potential
Proceedings Papers

Fracture Assessment for Butt Welded Plate of Ni-Based Alloy

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Masao Itatani, Takuya Ogawa, Toshiyuki Saito, Chihiro Narazaki, Kazuo Ogawa
Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 1, 911-916, July 18–22, 2010
Publisher: American Society of Mechanical Engineers
Paper No: PVP2010-25645
https://doi.org/10.1115/PVP2010-25645
View Paper titled, Fracture Assessment for Butt Welded Plate of Ni-Based Alloy
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Topics: Alloys, Fracture (Materials), Stress, Fracture (Process), Collapse, Electrical discharge machining, Plates (structures), Fatigue, Flow (Dynamics), Shapes