文献类型：期刊文献

英文题名：Ductile failure of flat plates containing two through-wall cracks: Experimental investigation and numerical

作者：Zhang, Xue-Wei[1];Wen, Jian-Feng[1];Wang, Tao[1];Zhang, Xian-Cheng[1];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2021

卷号：191

外文期刊名：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000637947000048)】；

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 careful examination on the grammar and typos with Jia-Wen Fei is greatly appreciated. The authors also would like to thank two anonymous reviewers for their encouragement and helpful comments on an earlier version of the paper.

语种：英文

外文关键词：Ductile failure; Ductility exhaustion; Crack interaction; Multiple cracks; Finite element analysis

摘要：Multiple cracks are frequently detected in structural components and should be assessed aimed to judge whether they can be treated as individual cracks or be combined to a larger crack. To study the ductile failure and crack interaction behavior, tensile tests using flat plates with two through-wall cracks were conducted, and 3D digital image correlation method (3D-DIC) was applied to acquire the displacement and full-field strain measurement. A damage evolution model integrated with a non-monotonic fracture strain locus was implemented to model the ductile fracture and crack interaction. Simulation results including load-displacement curves and predicted crack coalescence results fit well to the experiment data. Effects of mesh size and cut-off value of stress on the simulation results were investigated to ensure the accuracy of finite element analysis. The findings show that FE predictions using non-monotonic fracture strain locus are not only superior to those using monotonic ones, but also more accurate than alignment and combination rules in fitness-for-service codes.