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Naoto Kasahara
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Journal Articles

Study on Dynamic Post-Buckling Stability of Thin-Walled Cylinders Subjected to Horizontal Vibration

Yiji Ye, Sho Hasegawa, Masakazu Ichimiya, Naoto Kasahara
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. June 2024, 146(3): 031303.
Paper No: PVT-23-1150
https://doi.org/10.1115/1.4065176
Published Online: April 8, 2024
View Article titled, Study on Dynamic Post-Buckling Stability of Thin-Walled Cylinders Subjected to Horizontal Vibration
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Topics: Buckling, Displacement, Stability, Finite element methods, Vibration, Cylinders, Stress, Simulation, Finite element model
Proceedings Papers

Study on Dynamic Buckling Behavior and Post-Buckling Stability of Thin-Walled Cylinders Subjected to Lateral Vibration

Yiji Ye, Sho Hasegawa, Naoto Kasahara
Proc. ASME. PVP2023, Volume 7: Seismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division, V007T08A008, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-105543
https://doi.org/10.1115/PVP2023-105543
View Paper titled, Study on Dynamic Buckling Behavior and Post-Buckling Stability of Thin-Walled Cylinders Subjected to Lateral Vibration
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Topics: Buckling, Cylinders, Design, Earthquakes, Fast neutron reactors, Stability, Vessels, Vibration
Proceedings Papers

Proposal of Performance-Based Seismic Fragility Concept Related to Failure Modes for a Piping System

Akihiro Mano, Takuya Sato, Masakazu Ichimiya, Naoto Kasahara
Proc. ASME. PVP2023, Volume 7: Seismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division, V007T08A018, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-106165
https://doi.org/10.1115/PVP2023-106165
View Paper titled, Proposal of Performance-Based Seismic Fragility Concept Related to Failure Modes for a Piping System
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Topics: Cooling, Failure mechanisms, Flow (Dynamics), Piping systems
Proceedings Papers

Study on Post-Buckling Behaviors of Lower Heads for Fracture Control of Reactor Vessels Under BDBE

Naoto Kasahara, Masato Murohara, Takuya Sato
Proc. ASME. PVP2022, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A037, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-84449
https://doi.org/10.1115/PVP2022-84449
View Paper titled, Study on Post-Buckling Behaviors of Lower Heads for Fracture Control of Reactor Vessels Under BDBE
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Topics: Buckling, Fracture (Materials), Fracture (Process), Reactor vessels, Vessels
Proceedings Papers

Plan of a Shaking Table Test on a Piping System Model for Verifying the Fracture-Control Concept

Izumi Nakamura, Naoto Kasahara
Proc. ASME. PVP2022, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A036, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-84266
https://doi.org/10.1115/PVP2022-84266
View Paper titled, Plan of a Shaking Table Test on a Piping System Model for Verifying the Fracture-Control Concept
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Topics: Fracture (Materials), Fracture (Process), Pipes, Piping systems
Proceedings Papers

Prediction Concept of Ratchet-Induced Collapse Under Deadweight and Seismic Loading

Satoru Kai, Masakazu Ichimiya, Naoto Kasahara
Proc. ASME. PVP2022, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A038, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-84508
https://doi.org/10.1115/PVP2022-84508
View Paper titled, Prediction Concept of Ratchet-Induced Collapse Under Deadweight and Seismic Loading
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Topics: Collapse
Journal Articles

Normalized Ratcheting Diagram Under Sinusoidal Vibration Waves

Jinqi Lyu, Naoto Kasahara, Masakazu Ichimiya, Ryunosuke Sasaki
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. June 2022, 144(3): 031305.
Paper No: PVT-20-1193
https://doi.org/10.1115/1.4053222
Published Online: February 10, 2022
View Article titled, Normalized Ratcheting Diagram Under Sinusoidal Vibration Waves
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Topics: Pipes, Stress, Vibration, Waves, Shapes, Deformation
Journal Articles

Discussion on Failure Behavior of Piping Systems Under Extremely Large Seismic Loads in BDBE

Izumi Nakamura, Naoto Kasahara
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. June 2022, 144(3): 031901.
Paper No: PVT-20-1209
https://doi.org/10.1115/1.4053223
Published Online: January 18, 2022
View Article titled, Discussion on Failure Behavior of Piping Systems Under Extremely Large Seismic Loads in BDBE
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Topics: Alloys, Collapse, Failure, Failure mechanisms, Pipes, Piping systems, Simulation, Stress, Weight (Mass), Cycles
Proceedings Papers

Study on Buckling Strength and Post Buckling Behaviors of Reactor Vessel Lower Heads

Masato Murohara, Akira Yamazaki, Takuya Sato, Naoto Kasahara
Proc. ASME. ICONE28, Volume 4: Student Paper Competition, V004T14A072, August 4–6, 2021
Publisher: American Society of Mechanical Engineers
Paper No: ICONE28-65553
https://doi.org/10.1115/ICONE28-65553
View Paper titled, Study on Buckling Strength and Post Buckling Behaviors of Reactor Vessel Lower Heads
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Topics: Buckling, Reactor vessels, Failure, Design, Accidents, Deformation, Earthquakes, Fukushima nuclear disaster, Japan, 2011, High temperature, Nuclear reactor accidents
Proceedings Papers

Example Proposals of Fracture Controlled Vessels and Piping for Failure Mitigations

Naoto Kasahara, Takashi Wakai, Izumi Nakamura, Takuya Sato, Masakazu Ichimiya
Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A031, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-61952
https://doi.org/10.1115/PVP2021-61952
View Paper titled, Example Proposals of Fracture Controlled Vessels and Piping for Failure Mitigations
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Topics: Design, Failure, Fracture (Materials), Fracture (Process), Pipes, Vessels
Proceedings Papers

Proposal of Simulation Material Test Technique for Clarifying the Structure Failure Mechanisms Under Excessive Seismic Loads

Ryuta Hashidate, Shoichi Kato, Takashi Onizawa, Takashi Wakai, Naoto Kasahara
Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A029, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-61866
https://doi.org/10.1115/PVP2021-61866
View Paper titled, Proposal of Simulation Material Test Technique for Clarifying the Structure Failure Mechanisms Under Excessive Seismic Loads
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Topics: Constitutive equations, Failure mechanisms, Lead alloys, Simulation, Stress
Proceedings Papers

Dynamic Behavior of a Simplified Cantilever With Progressive Static Loading due to Ratchet Deformation

Satoru Kai, Naoto Kasahara, Masakazu Ichimiya
Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A030, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-61878
https://doi.org/10.1115/PVP2021-61878
View Paper titled, Dynamic Behavior of a Simplified Cantilever With Progressive Static Loading due to Ratchet Deformation
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Topics: Cantilevers, Deformation, Failure mechanisms, Failure, Accidents, Excitation, Stress, Weight (Mass), Collapse, Cycles
Proceedings Papers

Frequency Dependency of Beam Collapse due to Vibration Loads

Ryunosuke Sasaki, Masakazu Ichimiya, Jinqi Lyu, Naoto Kasahara
Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A040, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21375
https://doi.org/10.1115/PVP2020-21375
View Paper titled, Frequency Dependency of Beam Collapse due to Vibration Loads
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Topics: Collapse, Stress, Vibration
Proceedings Papers

Proposal of Simulation Materials Test Technique and Their Constitutive Equations for Structural Tests and Analyses Simulating Severe Accident Conditions

Ryuta Hashidate, Shoichi Kato, Takashi Onizawa, Takashi Wakai, Naoto Kasahara
Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A041, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21397
https://doi.org/10.1115/PVP2020-21397
View Paper titled, Proposal of Simulation Materials Test Technique and Their Constitutive Equations for Structural Tests and Analyses Simulating Severe Accident Conditions
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Topics: Accidents, Constitutive equations, Lead alloys, Simulation
Proceedings Papers

Application of Fracture Control to Mitigate Failure Consequence Under BDBE

Naoto Kasahara, Takashi Wakai, Izumi Nakamura, Takuya Sato, Masakazu Ichimiya
Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A038, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21072
https://doi.org/10.1115/PVP2020-21072
View Paper titled, Application of Fracture Control to Mitigate Failure Consequence Under BDBE
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Topics: Design, Failure, Failure mechanisms, Fracture (Materials), Fracture (Process)
Proceedings Papers

Investigation on Failure Behavior of Two-Elbow Piping System Models Made of the Simulation Material Under Excessive Seismic Loads

Izumi Nakamura, Naoto Kasahara
Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A039, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21140
https://doi.org/10.1115/PVP2020-21140
View Paper titled, Investigation on Failure Behavior of Two-Elbow Piping System Models Made of the Simulation Material Under Excessive Seismic Loads
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Topics: Alloys, Collapse, Failure, Failure mechanisms, Piping systems, Simulation, Stress
Proceedings Papers

Experimental and Analytical Study on Local Failure of Structure Subjected to High Temperature and Pressure

Yoshiki Tsunemoto, Takashi Sakaguchi, Takuya Sato, Naoto Kasahara
Proc. ASME. PVP2019, Volume 3: Design and Analysis, V003T03A038, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93166
https://doi.org/10.1115/PVP2019-93166
View Paper titled, Experimental and Analytical Study on Local Failure of Structure Subjected to High Temperature and Pressure
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Topics: Ductile fracture, Failure, High temperature, Hydrostatics, Pressure, Stress
Proceedings Papers

Research Plan and Progress to Realize Fracture Control of Nuclear Components

Naoto Kasahara, Takashi Wakai, Izumi Nakamura, Takuya Sato
Proc. ASME. PVP2019, Volume 3: Design and Analysis, V003T03A039, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93545
https://doi.org/10.1115/PVP2019-93545
View Paper titled, Research Plan and Progress to Realize Fracture Control of Nuclear Components
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Topics: Design, Failure mechanisms, Fracture (Materials)
Proceedings Papers

A Proposal of Inelastic Constitutive Equations of Lead Alloys Used for Structural Tests Simulating Severe Accident Conditions

Ryuta Hashidate, Takashi Onizawa, Takashi Wakai, Naoto Kasahara
Proc. ASME. PVP2019, Volume 3: Design and Analysis, V003T03A040, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93820
https://doi.org/10.1115/PVP2019-93820
View Paper titled, A Proposal of Inelastic Constitutive Equations of Lead Alloys Used for Structural Tests Simulating Severe Accident Conditions
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Topics: Accidents, Constitutive equations, Lead alloys
Proceedings Papers

Proposal of the Local Failure Evaluation Method With Stress Parameters

Takashi Sakaguchi, Mizuki Yoshida, Takuya Sato, Naoto Kasahara
Proc. ASME. PVP2018, Volume 3A: Design and Analysis, V03AT03A046, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84222
https://doi.org/10.1115/PVP2018-84222
View Paper titled, Proposal of the Local Failure Evaluation Method With Stress Parameters
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Topics: Evaluation methods, Failure, Stress, Fracture (Materials), Fracture (Process), Hydrostatics, Creep, Failure mechanisms, Nuclear power stations, Stress-strain curves