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Proceedings Papers

Constraint Effect on Fracture in Ductile-Brittle Transition Temperature Region (Report 2)

Kiminobu Hojo, Takatoshi Hirota, Yasuto Nagoshi, Takuya Fukahori, Kimihisa Sakima, Mitsuru Ohata, Fumiyoshi Minami

Proc. ASME. PVP2022, Volume 1: Codes and Standards, V001T01A003, July 17–22, 2022

Paper No: PVP2022-84186

DOI: https://doi.org/10.1115/PVP2022-84186

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Topics: Ductile-brittle transition, Fracture (Materials), Fracture (Process), Stress, Temperature

Proceedings Papers

Fatigue Crack Growth Prediction of a Pipe With a Circumferential Surface Flaw Using Δ J and Reference Stress Method

Kiminobu Hojo, Satoshi Kumagai

Proc. ASME. PVP2022, Volume 4A: Materials and Fabrication, V04AT06A018, July 17–22, 2022

Paper No: PVP2022-84555

DOI: https://doi.org/10.1115/PVP2022-84555

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Topics: Fatigue cracks, Pipes, Stress, Engineering standards, Computational methods, Cycles, Failure, Finite element analysis, Fitness-for-service, Fracture (Materials)

Proceedings Papers

Ductile Tearing Prediction of Ferritic Pipes by GTN Model for ATLAS+ European Project (Report 2)

Satoshi Kumagai, Kiminobu Hojo, Takatoshi Hirota, Keiji Kawanishi

Proc. ASME. PVP2022, Volume 4A: Materials and Fabrication, V04AT06A036, July 17–22, 2022

Paper No: PVP2022-84554

DOI: https://doi.org/10.1115/PVP2022-84554

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Topics: Ductile fracture, Finite element analysis, Pipes, Fracture (Materials), Coolants, Damage mechanics, Errors, Fracture mechanics, Nuclear reactors, Pressure

Proceedings Papers

Constraint Effect on Fracture in Ductile-Brittle Transition Temperature Region

Kiminobu Hojo, Takatoshi Hirota, Yasuto Nagoshi, Takuya Fukahori, Kimihisa Sakima, Mitsuru Ohata, Fumiyoshi Minami

Proc. ASME. PVP2021, Volume 1: Codes and Standards, V001T01A055, July 13–15, 2021

Paper No: PVP2021-61318

DOI: https://doi.org/10.1115/PVP2021-61318

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Topics: Ductile fracture, Ductile-brittle transition, Fracture (Materials), Temperature

Proceedings Papers

Technical Basis for Revision of Code Case N-809 on Reference Fatigue Crack Growth Curves for Austenitic Stainless Steels in Pressurized Water Reactor Environments

Russell C. Cipolla, Warren H. Bamford, Kiminobu Hojo, Yuichiro Nomura

Proc. ASME. PVP2021, Volume 1: Codes and Standards, V001T01A001, July 13–15, 2021

Paper No: PVP2021-61728

DOI: https://doi.org/10.1115/PVP2021-61728

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Topics: Fatigue cracks, Pressurized water reactors, Stainless steel

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

Ductile Tearing Prediction of Ferritic Pipe Material by GTN Model for ATLAS+ European Project

Kiminobu Hojo, Takatoshi Hirota, Naoki Ogawa, Satoshi Kumagai

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A047, August 3, 2020

Paper No: PVP2020-21645

DOI: https://doi.org/10.1115/PVP2020-21645

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Topics: Pipes, Fracture (Materials), Fracture (Process), Coolants, Ductile fracture, Fracture mechanics, Nuclear reactors, Pressure, Simulation, Stress

Proceedings Papers

Investigation of Temperature Dependence of Weibull Parameters of the Beremin Model in Ductile-Brittle Transition Temperature Region

Kiminobu Hojo, Naoki Ogawa, Kentaro Yoshimoto, Takatoshi Hirota, Yasuto Nagoshi

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A014, August 3, 2020

Paper No: PVP2020-21651

DOI: https://doi.org/10.1115/PVP2020-21651

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Topics: Ductile-brittle transition, Temperature, Temperature effects, Alloy steel, Fracture (Materials), Fracture (Process), Brittle fracture, Carbon steel, Ductile fracture, Electromagnetic scattering

Proceedings Papers

Mode I Ductile Crack Growth of 1TC(T) Specimen Under Large Cyclic Loading: Part IV

Kiminobu Hojo

Proc. ASME. PVP2020, Volume 1: Codes and Standards, V001T01A031, August 3, 2020

Paper No: PVP2020-21658

DOI: https://doi.org/10.1115/PVP2020-21658

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Topics: Ductile fracture, Stress, Fitness-for-service, Fracture (Materials), Japan Society of Mechanical Engineers, Fatigue cracks, Hardening, Pipes, Computational methods, Computer simulation

Journal Articles

Special Issue: Current Trends for Pressure Vessels and Piping Technology

Akira Maekawa, Kiminobu Hojo, Marwan Hassan

J. Pressure Vessel Technol. April 2020, 142(2): 020301.

Paper No: PVT-19-1255

DOI: https://doi.org/10.1115/1.4046178

Published Online: February 26, 2020

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Topics: Pipes, Pressure vessels, Engineering standards, Fracture (Process), Fluid structure interaction, Fracture (Materials), Design

Proceedings Papers

Introduction of CASS Pipe Flaw Evaluation of JSME Rules on Fitness for Service

Kiminobu Hojo

Proc. ASME. PVP2019, Volume 1: Codes and Standards, V001T01A052, July 14–19, 2019

Paper No: PVP2019-93933

DOI: https://doi.org/10.1115/PVP2019-93933

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Topics: Fitness-for-service, Japan Society of Mechanical Engineers, Pipes, Fracture (Materials), Fracture (Process), Stainless steel, Stress, Databases, Evaluation methods, Flat plates

Proceedings Papers

Mode I Ductile Crack Growth of 1TCT Specimen Under Large Cyclic Loading: Part III

Kiminobu Hojo

Proc. ASME. PVP2019, Volume 1: Codes and Standards, V001T01A028, July 14–19, 2019

Paper No: PVP2019-93476

DOI: https://doi.org/10.1115/PVP2019-93476

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Topics: Ductile fracture, Stress, Fitness-for-service, Fracture (Materials), Japan Society of Mechanical Engineers, Computational methods, Fatigue cracks, Hardening, Pipes, Piping systems

Journal Articles

Discussion: “Consideration of a Stress-Based Criterion for Local Failure and Its Implementation in a Damage Mechanics Model” (Nakamura, H., 2019, ASME J. Pressure Vessel Technol., 141 (4), p. 041405)

Kiminobu Hojo

J. Pressure Vessel Technol. December 2019, 141(6): 065501.

Paper No: PVT-19-1145

DOI: https://doi.org/10.1115/1.4044758

Published Online: October 9, 2019

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Topics: Damage mechanics, Failure, Pressure vessels, Stress

Proceedings Papers

Revision to Stress Intensity Factor Equations for ASME Section XI Appendix C-4000: Determination of Failure Mode

Kiminobu Hojo, Steven Xu

Proc. ASME. PVP2018, Volume 1A: Codes and Standards, V01AT01A011, July 15–20, 2018

Paper No: PVP2018-85051

DOI: https://doi.org/10.1115/PVP2018-85051

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Topics: Failure mechanisms, Stress, Pipes, Bending (Stress), Dimensions, Materials properties, Membranes, Shapes, Temperature

Proceedings Papers

Improvement of Target Flaw Sizes of CASS Pipe for PD Approval Using PFM Code Preface

Wataru Nishi, Takatoshi Hirota, Mayumi Ochi, Daiki Takagoshi, Kiminobu Hojo

Proc. ASME. PVP2018, Volume 1A: Codes and Standards, V01AT01A055, July 15–20, 2018

Paper No: PVP2018-85015

DOI: https://doi.org/10.1115/PVP2018-85015

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Topics: Pipes, Ferrites (Magnetic materials), Collapse, Mechanical properties, Stress, Ductile fracture, Failure mechanisms, Fracture mechanics, Nondestructive evaluation, Sensitivity analysis

Proceedings Papers

Fracture Analysis of Ductile-Brittle Transition Temperature Region Considering Specimens With Different Constraints

Kiminobu Hojo, Takatoshi Hirota, Naoki Ogawa, Kentaro Yoshimoto, Yasuto Nagoshi, Shinichi Kawabata

Proc. ASME. PVP2018, Volume 1A: Codes and Standards, V01AT01A057, July 15–20, 2018

Paper No: PVP2018-84385

DOI: https://doi.org/10.1115/PVP2018-84385

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Topics: Ductile-brittle transition, Fracture (Materials), Fracture (Process), Temperature, Electromagnetic scattering, Flat plates, Brittleness, Damage mechanics, Ductile fracture, Evaluation methods

Proceedings Papers

Mode I Ductile Crack Growth of 1TCT Specimen Under Large Cyclic Loading: Part II

Kiminobu Hojo, Shinichi Kawabata, Naoki Ogawa

Proc. ASME. PVP2018, Volume 6B: Materials and Fabrication, V06BT06A044, July 15–20, 2018

Paper No: PVP2018-84383

DOI: https://doi.org/10.1115/PVP2018-84383

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Topics: Ductile fracture, Stress, Fitness-for-service, Fracture (Materials), Hardening, Japan Society of Mechanical Engineers, Compression, Computational methods, Cycles, Welding

Proceedings Papers

Guideline on Application Process of Techniques Developed for Repair, Replacement and Mitigation Activities

Koji Koyama, Hiroyuki Kobayashi, Kiminobu Hojo

Proc. ASME. PVP2018, Volume 1B: Codes and Standards, V01BT01A061, July 15–20, 2018

Paper No: PVP2018-84480

DOI: https://doi.org/10.1115/PVP2018-84480

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Topics: Maintenance, Nuclear power stations

Proceedings Papers

Sensitivity Analysis of Crack Shape on Screening Parameter in JSME FFS Rules for Nuclear Power Plants

Naoki Miura, Kiminobu Hojo

Proc. ASME. PVP2017, Volume 1B: Codes and Standards, V01BT01A054, July 16–20, 2017

Paper No: PVP2017-66183

DOI: https://doi.org/10.1115/PVP2017-66183

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Topics: Fitness-for-service, Fracture (Materials), Japan Society of Mechanical Engineers, Nuclear power stations, Sensitivity analysis, Shapes, Stress, Surface cracks, Fracture mechanics, Collapse

Proceedings Papers

Mode I Ductile Crack Growth of CT Specimen Under Large Cyclic Loading

Kiminobu Hojo, Shinichi Kawabata

Proc. ASME. PVP2017, Volume 6A: Materials and Fabrication, V06AT06A003, July 16–20, 2017

Paper No: PVP2017-65691

DOI: https://doi.org/10.1115/PVP2017-65691

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Topics: Ductile fracture, Fitness-for-service, Computational methods, Fracture (Materials), Hardening, Japan Society of Mechanical Engineers, Stress-strain curves, Welding

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Journal citation

NARROW

Constraint Effect on Fracture in Ductile-Brittle Transition Temperature Region (Report 2)

Fatigue Crack Growth Prediction of a Pipe With a Circumferential Surface Flaw Using Δ J and Reference Stress Method

Ductile Tearing Prediction of Ferritic Pipes by GTN Model for ATLAS+ European Project (Report 2)

Constraint Effect on Fracture in Ductile-Brittle Transition Temperature Region

Technical Basis for Revision of Code Case N-809 on Reference Fatigue Crack Growth Curves for Austenitic Stainless Steels in Pressurized Water Reactor Environments

Benchmark Analysis by Beremin Model and GTN Model in CAF Subcommittee

Ductile Tearing Prediction of Ferritic Pipe Material by GTN Model for ATLAS+ European Project

Investigation of Temperature Dependence of Weibull Parameters of the Beremin Model in Ductile-Brittle Transition Temperature Region

Mode I Ductile Crack Growth of 1TC(T) Specimen Under Large Cyclic Loading: Part IV

Special Issue: Current Trends for Pressure Vessels and Piping Technology

Introduction of CASS Pipe Flaw Evaluation of JSME Rules on Fitness for Service

Mode I Ductile Crack Growth of 1TCT Specimen Under Large Cyclic Loading: Part III

Discussion: “Consideration of a Stress-Based Criterion for Local Failure and Its Implementation in a Damage Mechanics Model” (Nakamura, H., 2019, ASME J. Pressure Vessel Technol., 141 (4), p. 041405)

Revision to Stress Intensity Factor Equations for ASME Section XI Appendix C-4000: Determination of Failure Mode

Improvement of Target Flaw Sizes of CASS Pipe for PD Approval Using PFM Code Preface

Fracture Analysis of Ductile-Brittle Transition Temperature Region Considering Specimens With Different Constraints

Mode I Ductile Crack Growth of 1TCT Specimen Under Large Cyclic Loading: Part II

Guideline on Application Process of Techniques Developed for Repair, Replacement and Mitigation Activities

Sensitivity Analysis of Crack Shape on Screening Parameter in JSME FFS Rules for Nuclear Power Plants

Mode I Ductile Crack Growth of CT Specimen Under Large Cyclic Loading

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