文献类型：期刊文献

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

作者：Wang, Tao[1];Wen, Jian-Feng[1];Liao, Peng-Peng[1];Zhang, Xian-Cheng[1];Kim, Yun-Jae[2];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Korea Univ, Dept Mech Engn, Seoul 136701, South Korea

年份：2021

卷号：146

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20210809952502);WOS:【SCI-EXPANDED(收录号:WOS:000623085400005)】；

基金：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.

语种：英文

外文关键词：Ultra-low cycle fatigue (ULCF); Fracture strain energy; Ductile fracture; Finite Element Analysis; Seismic load

摘要：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.