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Journal Articles

Tensile Strain Characteristics of Small-Scale Fracture Toughness Test Specimens and Large-Scale Tests Under Loading

Dong-Yeob Park, Jie Liang, James A. Gianetto, Takahiro Sakimoto, Hisakazu Tajika, Satoshi Igi
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. August 2025, 147(4): 041502.
Paper No: PVT-24-1162
https://doi.org/10.1115/1.4068258
Published Online: April 10, 2025
View Articletitled, Tensile Strain Characteristics of Small-Scale Fracture Toughness Test Specimens and Large-Scale Tests Under Loading
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Topics: Fracture (Materials), Fracture toughness, Pipes, Pipelines
Proceedings Papers

Toughness Evaluation and Integrity Assessment of Modern X80 Linepipe Welds for the Application of High Pressure Hydrogen Pipeline

Nobuyuki Ishikawa, Hikaru Imayama, Takahiro Sakimoto, Dan Jia, Jiawei Wang, Yong-Yi Wang
Proc. ASME. IPC2024, Volume 5: Risk and Reliability; Offshore, Upstream, and Production Pipelines; Emerging Fuels and Greenhouse Gas Emissions, V005T09A024, September 23–27, 2024
Publisher: American Society of Mechanical Engineers
Paper No: IPC2024-133871
https://doi.org/10.1115/IPC2024-133871
View Paper titled, Toughness Evaluation and Integrity Assessment of Modern X80 Linepipe Welds for the Application of High Pressure Hydrogen Pipeline
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Topics: Fracture toughness, High pressure (Physics), Hydrogen, Pipelines, Welded joints
Proceedings Papers

Tensile Strain Characteristics of Small-Scale Fracture Toughness Test Specimens Under Loading

Dong-Yeob Park, Jie Liang, James A. Gianetto, Takahiro Sakimoto, Hisakazu Tajika, Satoshi Igi
Proc. ASME. PVP2024, Volume 4: Materials & Fabrication, V004T06A052, July 28–August 2, 2024
Publisher: American Society of Mechanical Engineers
Paper No: PVP2024-122376
https://doi.org/10.1115/PVP2024-122376
View Paper titled, Tensile Strain Characteristics of Small-Scale Fracture Toughness Test Specimens Under Loading
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Topics: Fracture toughness
Proceedings Papers

Study of Crack Initiation and Fracture Toughness Evaluation in J IC Testing of Linepipe Steel Under Gaseous Hydrogen Environment

Yoshihiro Nishihara, Ryuichi Inoue, Hiroshi Okano, Takahiro Sakimoto
Proc. ASME. PVP2024, Volume 4: Materials & Fabrication, V004T06A005, July 28–August 2, 2024
Publisher: American Society of Mechanical Engineers
Paper No: PVP2024-122079
https://doi.org/10.1115/PVP2024-122079
View Paper titled, Study of Crack Initiation and Fracture Toughness Evaluation in J IC Testing of Linepipe Steel Under Gaseous Hydrogen Environment
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Topics: Fracture (Materials), Fracture toughness, Hydrogen, Steel, Testing, ASME Boiler and Pressure Vessel Code, ASTM International, Carbon neutrality, Deformation, Degrees of freedom
Proceedings Papers

Integrity Assessment of Linepipes for Transporting High Pressure Hydrogen Based on ASME B31.12

Nobuyuki Ishikawa, Takahiro Sakimoto, Junji Shimamura, Jiawei Wang, Yong-Yi Wang
Proc. ASME. IPC2022, Volume 1: Pipeline Safety Management Systems; Project Management, Design, Construction, and Environmental Issues; Strain-Based Design and Assessment; Risk and Reliability; Emerging Fuels and Greenhouse Gas Emissions, V001T08A012, September 26–30, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IPC2022-87180
https://doi.org/10.1115/IPC2022-87180
View Paper titled, Integrity Assessment of Linepipes for Transporting High Pressure Hydrogen Based on ASME B31.12
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Topics: Fatigue cracks, Fracture toughness, High pressure (Physics), Hydrogen
Journal Articles

Collapse Limit of Thermally Treated Line Pipe Under Combined External Pressure and Bending Deformation

Takahiro Sakimoto, Hisakazu Tajika, Tsunehisa Handa, Satoshi Igi, Joe Kondo
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research Papers
J. Offshore Mech. Arct. Eng. April 2023, 145(2): 021703.
Paper No: OMAE-22-1040
https://doi.org/10.1115/1.4056186
Published Online: November 23, 2022
View Articletitled, Collapse Limit of Thermally Treated Line Pipe Under Combined External Pressure and Bending Deformation
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Topics: Collapse, External pressure, Pipes, Pressure, Thermodynamic cycles, Deformation, Testing
Proceedings Papers

Collapse Resistance Under Combined External Pressure and Bending Deformation of Coated Linepipe

Takahiro Sakimoto, Hisakazu Tajika, Tsunehisa Handa, Yoshiaki Murakami, Satoshi Igi, Joe Kondo
Proc. ASME. OMAE2020, Volume 3: Materials Technology, V003T03A004, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-18250
https://doi.org/10.1115/OMAE2020-18250
View Paper titled, Collapse Resistance Under Combined External Pressure and Bending Deformation of Coated Linepipe
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Topics: Collapse, Deformation, External pressure, Pipes, Yield strength, Cycles, Thermodynamic cycles, Water, Heating, Stress
Journal Articles

Brittle Crack Arrestability and Inverse Fracture in DWTT

Takahiro Sakimoto, Toshihiko Amano, Takashi Hiraide, Tetsuya Tagawa, Satoshi Igi, Yasuhiro Shinohara
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. June 2021, 143(3): 031503.
Paper No: PVT-20-1086
https://doi.org/10.1115/1.4048419
Published Online: October 7, 2020
View Articletitled, Brittle Crack Arrestability and Inverse Fracture in DWTT
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Topics: Brittleness, Fracture (Materials), Temperature, Shear (Mechanics)
eBook Chapter

TENSILE STRAIN CAPACITY AFTER LOCAL BUCKLING OF HIGH STRAIN PIPELINE IN FULL-SCALE BENDING TESTS

Publisher: ASME Press
Published: 2020
https://doi.org/10.1115/1.861998_ch28
ISBN: 9780791861998
Open the PDF for TENSILE STRAIN CAPACITY AFTER LOCAL BUCKLING OF HIGH STRAIN PIPELINE IN FULL-SCALE BENDING TESTS in another window
Topics: Buckling, Pipelines
Proceedings Papers

Effect of Tensile Pre-Strain on Collapse Pressure of Coated Linepipe

Takahiro Sakimoto, Tsunehisa Handa, Hisakazu Tajika, Yoshiaki Murakami, Joe Kondo
Proc. ASME. OMAE2019, Volume 4: Materials Technology, V004T03A005, June 9–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2019-95923
https://doi.org/10.1115/OMAE2019-95923
View Paper titled, Effect of Tensile Pre-Strain on Collapse Pressure of Coated Linepipe
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Topics: Collapse, Pressure, Yield strength, Pipes, Cycles, Thermodynamic cycles, Coating processes, Stress, Water, Anticorrosion coatings
Proceedings Papers

Girth Weld Strength Matching Effect on Tensile Strain Capacity of Grade X70 High Strain Line Pipe

Hisakazu Tajika, Takahiro Sakimoto, Tsunehisa Handa, Rinsei Ikeda, Joe Kondo
Proc. ASME. IPC2018, Volume 2: Pipeline Safety Management Systems; Project Management, Design, Construction, and Environmental Issues; Strain Based Design; Risk and Reliability; Northern Offshore and Production Pipelines, V002T06A005, September 24–28, 2018
Publisher: American Society of Mechanical Engineers
Paper No: IPC2018-78778
https://doi.org/10.1115/IPC2018-78778
View Paper titled, Girth Weld Strength Matching Effect on Tensile Strain Capacity of Grade X70 High Strain Line Pipe
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Topics: Pipes, Buckling, Pipelines, Deformation, Pipe bending, Rupture, Design, Electrical discharge machining, Gas metal arc welding, Gas tungsten arc welding
Proceedings Papers

Effect of Notch Type in Drop-Weight Tear Test Specimen on Crack Propagation and Arrest Behavior

Satoshi Igi, Toshihiko Amano, Takahiro Sakimoto, Yasuhiro Shinohara, Tetsuya Tagawa
Proc. ASME. IPC2018, Volume 3: Operations, Monitoring, and Maintenance; Materials and Joining, V003T05A010, September 24–28, 2018
Publisher: American Society of Mechanical Engineers
Paper No: IPC2018-78579
https://doi.org/10.1115/IPC2018-78579
View Paper titled, Effect of Notch Type in Drop-Weight Tear Test Specimen on Crack Propagation and Arrest Behavior
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Topics: Crack propagation, Weight (Mass), Fracture (Materials), Brittleness, Shear (Mechanics), Ambiguity, American Petroleum Institute, Brittle fracture, Hammers, Pipelines
Proceedings Papers

Strain Capacity Investigation on Grade X70 High Strain Line Pipe With Girth Weld

Hisakazu Tajika, Takahiro Sakimoto, Tsunehisa Handa, Satoshi Igi, Rinsei Ikeda, Joe Kondo
Proc. ASME. PVP2018, Volume 6B: Materials and Fabrication, V06BT06A055, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-85059
https://doi.org/10.1115/PVP2018-85059
View Paper titled, Strain Capacity Investigation on Grade X70 High Strain Line Pipe With Girth Weld
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Topics: Pipes, Buckling, Pipelines, Deformation, Gas metal arc welding, Gas tungsten arc welding, Pipe bending, Base metals, Design, Electrical discharge machining
Proceedings Papers

Relationship of Fracture Behaviours Between Full-Scale Pipe Bending and Small-Scale Toughness Tests

Dong-Yeob Park, Hisakazu Tajika, Takahiro Sakimoto, Satoshi Igi, James A. Gianetto, Jie Liang, Jean-Philippe Gravel, Joe Kondo
Proc. ASME. PVP2018, Volume 6B: Materials and Fabrication, V06BT06A050, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84138
https://doi.org/10.1115/PVP2018-84138
View Paper titled, Relationship of Fracture Behaviours Between Full-Scale Pipe Bending and Small-Scale Toughness Tests
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Topics: Fracture (Materials), Fracture toughness, Pipe bending, Pipes, Electrical discharge machining, Deformation, Design, Displacement, Heat, Manufacturing
Journal Articles

Inverse Fracture in DWTT and Brittle Crack Behavior in Large-Scale Brittle Crack Arrest Test

Tetsuya Tagawa, Toshihiko Amano, Takashi Hiraide, Takahiro Sakimoto, Satoshi Igi, Taishi Fujishiro, Takuya Hara, Takehiro Inoue, Shuji Aihara
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. October 2018, 140(5): 051205.
Paper No: PVT-18-1042
https://doi.org/10.1115/1.4040641
Published Online: August 2, 2018
View Articletitled, Inverse Fracture in DWTT and Brittle Crack Behavior in Large-Scale Brittle Crack Arrest Test
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Topics: Brittleness, Fracture (Materials), Fracture (Process)
Proceedings Papers

Fracture Behavior in West Jefferson Test Under Low-Temperature Condition for X65 Steel Pipe With High Charpy Energy: Current Activities in HLP Committee, Japan, Report 1

Toshihiko Amano, Satoshi Igi, Takahiro Sakimoto, Takehiro Inoue, Shuji Aihara
Proc. ASME. IPC2016, Volume 3: Operations, Monitoring and Maintenance; Materials and Joining, V003T05A008, September 26–30, 2016
Publisher: American Society of Mechanical Engineers
Paper No: IPC2016-64308
https://doi.org/10.1115/IPC2016-64308
View Paper titled, Fracture Behavior in West Jefferson Test Under Low-Temperature Condition for X65 Steel Pipe With High Charpy Energy: Current Activities in HLP Committee, Japan, Report 1
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Topics: Fracture (Materials), Low temperature, Pipes, Steel, Fracture (Process), Temperature, Brittleness, Phase transition temperature, Cooling, American Petroleum Institute
Proceedings Papers

Ductile Crack Extension Analysis for X80 Bending Deformation Using Damage-Based Model

Satoshi Igi, Mitsuru Ohata, Takahiro Sakimoto, Kenji Oi, Joe Kondo
Proc. ASME. IPC2014, Volume 4: Production Pipelines and Flowlines; Project Management; Facilities Integrity Management; Operations and Maintenance; Pipelining in Northern and Offshore Environments; Strain-Based Design; Standards and Regulations, V004T11A010, September 29–October 3, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IPC2014-33432
https://doi.org/10.1115/IPC2014-33432
View Paper titled, Ductile Crack Extension Analysis for X80 Bending Deformation Using Damage-Based Model
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Topics: Damage, Deformation, Ductile fracture, Simulation models, Buckling, Finite element analysis, Fracture (Materials), Pipes, Pressure, Shapes
Proceedings Papers

Buckling and Tensile Strain Capacity of Girth Welded 48″ X80 Pipeline

Satoshi Igi, Mitsuru Ohata, Takahiro Sakimoto, Junji Shimamura, Kenji Oi
Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T03A039, June 9–14, 2013
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2013-10994
https://doi.org/10.1115/OMAE2013-10994
View Paper titled, Buckling and Tensile Strain Capacity of Girth Welded 48″ X80 Pipeline
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Topics: Buckling, Pipelines, Ductile fracture, Pipes, Fracture (Materials), Fracture (Process), Damage, Finite element analysis, High pressure (Physics), Necking
Proceedings Papers

Tensile Strain Capacity of X80 Girth Welded Linepipes and Crack Growth Analysis

Satoshi Igi, Takahiro Sakimoto, Shigeru Endo, Ryuji Muraoka, Takekazu Arakawa
Proc. ASME. OMAE2012, Volume 6: Materials Technology; Polar and Arctic Sciences and Technology; Petroleum Technology Symposium, 329-334, July 1–6, 2012
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2012-84076
https://doi.org/10.1115/OMAE2012-84076
View Paper titled, Tensile Strain Capacity of X80 Girth Welded Linepipes and Crack Growth Analysis
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Topics: Fracture (Materials), Pipes, Tension, Finite element analysis, Pressure, Ductile fracture, Pipelines
Proceedings Papers

A Study of Deformation Behavior of Double Jointing Girth Welds

Tomoyuki Yokota, Yoshiaki Murakami, Takahiro Sakimoto, Igi Satoshi, Shigeru Endo
Proc. ASME. IPC2012, Volume 4: Pipelining in Northern and Offshore Environments; Strain-Based Design; Risk and Reliability; Standards and Regulations, 329-335, September 24–28, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IPC2012-90555
https://doi.org/10.1115/IPC2012-90555
View Paper titled, A Study of Deformation Behavior of Double Jointing Girth Welds
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Topics: Deformation, Welded joints, Elongation, Design, Metals, Gas metal arc welding, Pipes, Welding, American Petroleum Institute, Arc welding