文献类型：期刊文献

英文题名：Ductile tearing analyses of cracked TP304 pipes using the multiaxial fracture strain energy model and the Gurson-Tvergaard-Needleman model

作者：Wang, Tao[1];Wen, Jian-Feng[1];Kim, Yun-Jae[2];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;[2]Korea Univ, Dept Mech Engn, Seoul, South Korea

年份：2020

卷号：43

期号：10

起止页码：2402

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

收录：;EI(收录号：20203309037905);WOS:【SCI-EXPANDED(收录号:WOS:000558066900001)】；

基金：Fundamental Research Funds for the Central Universities; Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning; Shanghai Pujiang Program, Grant/Award Number: 18PJ1402300; National Natural Science Foundation of China, Grant/Award Number: 51875203; National Key R&D Program of China, Grant/Award Number: 2018YFC0808800

语种：英文

外文关键词：damage mechanics; ductile fracture; finite element method; Gurson-Tvergaard-Needleman model; multiaxial fracture strain energy model

摘要：Ductile crack growth behaviours of TP304 pipes containing different circumferential defects were investigated in the study. Finite element (FE) damage analysis of the ductile fracture was carried out based on an uncoupled multiaxial fracture strain energy (MFSE) model with only two model parameters, which can be calibrated by data from tensile tests and fracture toughness tests. For the purpose of comparison, the Gurson-Tvergaard-Needleman (GTN) model was also employed in the FE damage analysis. It is observed that the MFSE model can reproduce the ductile tearing experiments as excellently as the GTN model does. Despite its simplicity, the MFSE model can reasonably predict the magnitudes of the crack initiation load and maximum load, the load-line displacement, the crack mouth opening displacement, the crack extension and the crack profiles in the full-scale cracked pipe tests.