文献类型：期刊文献

英文题名：Effects of the stress state on plastic deformation and ductile failure: Experiment and numerical simulation using a newly designed tension-shear specimen

作者：Zhang, Xue-Wei[1];Wen, Jian-Feng[1];Zhang, Xian-Cheng[1];Wang, Xiao-Gang[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]Hunan Univ, Coll Mech & Vehicle Engn, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China

年份：2019

卷号：42

期号：9

起止页码：2079

外文期刊名：FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES

收录：;EI(收录号：20192807172890);WOS:【SCI-EXPANDED(收录号:WOS:000474017100001)】；

基金：111 Project of China, Grant/Award Number: B13020; Shanghai Pujiang Program, Grant/Award Number: 18PJ1402300; National Natural Science Foundation of China, Grant/Award Numbers: 11472105, 51505149 and 51875203; National Key R&D Program of China, Grant/Award Number: 2018YFC0808800

语种：英文

外文关键词：ductile fracture; ductility exhaustion; fracture locus; notched plate; positive stress triaxiality; stress state

摘要：The stress state is one of the most notable factors that dominates the initiation of ductile fracture. To examine the effects of the stress state on plasticity and ductile failure, a new tension-shear specimen that can cover a wide range of stress triaxialities was designed. A fracture locus was constructed in the space of ductility and stress triaxiality for two typical steels based on a series of tests. It is observed that the equivalent plastic strain at failure exhibits a nonmonotonic variation with increasing the value of stress triaxiality. A simple damage model based on the ductility exhaustion concept was used to simulate the failure behaviour, and a good agreement is achieved between simulation results and experimental data. It is further shown that consideration of fracture locus covering a wide range of stress triaxialities is a key to an accurate prediction.