A study of ultra-low cycle fatigue failure based on a fracture strain energy model
- Authors
- Wang, Tao; Wen, Jian-Feng; Liao, Peng-Peng; Zhang, Xian-Cheng; Kim, Yun-Jae; Tu, Shan-Tung
- Issue Date
- 5월-2021
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Ultra-low cycle fatigue (ULCF); Fracture strain energy; Ductile fracture; Finite Element Analysis; Seismic load
- Citation
- INTERNATIONAL JOURNAL OF FATIGUE, v.146
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF FATIGUE
- Volume
- 146
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/49413
- DOI
- 10.1016/j.ijfatigue.2021.106149
- ISSN
- 0142-1123
- 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.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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