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 modeling

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

机构：[1] Key Laboratory of Pressure Systems and Safety [Ministry of Education], School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2021

卷号：191

外文期刊名：International Journal of Pressure Vessels and Piping

收录：EI(收录号：20211810295569)

语种：英文

外文关键词：Plates (structural components) - Tensile testing - Image correlation - Ductile fracture

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. ? 2021 Elsevier Ltd