A study of ultra-low cycle fatigue failure based on a fracture strain energy model

Tao Wang; Jian Feng Wen; Peng Peng Liao; Xian Cheng Zhang; Yun Jae Kim; Shan Tung Tu

doi:10.1016/j.ijfatigue.2021.106149

A study of ultra-low cycle fatigue failure based on a fracture strain energy model

Tao Wang, Jian Feng Wen, Peng Peng Liao, Xian Cheng Zhang, Yun Jae Kim, Shan Tung Tu

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Ductile failure under ultra-low cycle fatigue (ULCF) loading is often the limit service state of a nuclear structure. In the paper, ULCF tests for a C-Mn-Si steel are carried out. It is observed that the fracture displacement decreases as the number of fatigue cycles increases. An energy-based model, which considers the effects of both stress triaxiality and cyclic loading on the critical fracture strain energy, is proposed. Coupled with the new model, finite element analyses of the round notched specimens can predict the equivalent plastic strain and the number of fatigue cycles to fracture within a scatter band of 1.5.

Original language	English
Article number	106149
Journal	International Journal of Fatigue
Volume	146
DOIs	https://doi.org/10.1016/j.ijfatigue.2021.106149
Publication status	Published - 2021 May

Keywords

Ductile fracture
Finite Element Analysis
Fracture strain energy
Seismic load
Ultra-low cycle fatigue (ULCF)

ASJC Scopus subject areas

Modelling and Simulation
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.ijfatigue.2021.106149

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title = "A study of ultra-low cycle fatigue failure based on a fracture strain energy model",

abstract = "Ductile failure under ultra-low cycle fatigue (ULCF) loading is often the limit service state of a nuclear structure. In the paper, ULCF tests for a C-Mn-Si steel are carried out. It is observed that the fracture displacement decreases as the number of fatigue cycles increases. An energy-based model, which considers the effects of both stress triaxiality and cyclic loading on the critical fracture strain energy, is proposed. Coupled with the new model, finite element analyses of the round notched specimens can predict the equivalent plastic strain and the number of fatigue cycles to fracture within a scatter band of 1.5.",

keywords = "Ductile fracture, Finite Element Analysis, Fracture strain energy, Seismic load, Ultra-low cycle fatigue (ULCF)",

author = "Tao Wang and Wen, {Jian Feng} and Liao, {Peng Peng} and Zhang, {Xian Cheng} and Kim, {Yun Jae} and Tu, {Shan Tung}",

note = "Funding Information: Financial support from the National Key R&D Program of China (Project no.: 2018YFC0808800) and the National Natural Science Foundation of China (Project no.: 51875203) is gratefully acknowledged. The research is also supported by the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning and by the Fundamental Research Funds for the Central Universities . The authors are also grateful for the financial support from the Higher Education Discipline Innovation Project (111 Project) under the funding code B13020. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = may,

doi = "10.1016/j.ijfatigue.2021.106149",

language = "English",

volume = "146",

journal = "International Journal of Fatigue",

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AU - Wang, Tao

AU - Wen, Jian Feng

AU - Liao, Peng Peng

AU - Zhang, Xian Cheng

AU - Kim, Yun Jae

AU - Tu, Shan Tung

N1 - Funding Information: Financial support from the National Key R&D Program of China (Project no.: 2018YFC0808800) and the National Natural Science Foundation of China (Project no.: 51875203) is gratefully acknowledged. The research is also supported by the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning and by the Fundamental Research Funds for the Central Universities . The authors are also grateful for the financial support from the Higher Education Discipline Innovation Project (111 Project) under the funding code B13020. Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/5

Y1 - 2021/5

N2 - Ductile failure under ultra-low cycle fatigue (ULCF) loading is often the limit service state of a nuclear structure. In the paper, ULCF tests for a C-Mn-Si steel are carried out. It is observed that the fracture displacement decreases as the number of fatigue cycles increases. An energy-based model, which considers the effects of both stress triaxiality and cyclic loading on the critical fracture strain energy, is proposed. Coupled with the new model, finite element analyses of the round notched specimens can predict the equivalent plastic strain and the number of fatigue cycles to fracture within a scatter band of 1.5.

AB - Ductile failure under ultra-low cycle fatigue (ULCF) loading is often the limit service state of a nuclear structure. In the paper, ULCF tests for a C-Mn-Si steel are carried out. It is observed that the fracture displacement decreases as the number of fatigue cycles increases. An energy-based model, which considers the effects of both stress triaxiality and cyclic loading on the critical fracture strain energy, is proposed. Coupled with the new model, finite element analyses of the round notched specimens can predict the equivalent plastic strain and the number of fatigue cycles to fracture within a scatter band of 1.5.

KW - Ductile fracture

KW - Finite Element Analysis

KW - Fracture strain energy

KW - Seismic load

KW - Ultra-low cycle fatigue (ULCF)

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VL - 146

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 106149

ER -

A study of ultra-low cycle fatigue failure based on a fracture strain energy model

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Keywords

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