文献类型：期刊文献

英文题名：Two-parameter fracture prediction for cracked plates under bending

作者：Xiao, J. Y.[1];Wang, G. Z.[1];Wang, Y. H.[1];Tu, S. T.[1];Xuan, F. Z.[1]

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

年份：2021

卷号：255

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20213510832089);WOS:【SCI-EXPANDED(收录号:WOS:000696933700003)】；

基金：This work was financially supported by the Projects of the National Natural Science Foundation of China (51975212 and 51835003) .

语种：英文

外文关键词：Two-parameter approach; Constraint; Fracture prediction; Cracks; Plates

摘要：In this work, the fracture prediction method based on two-parameter J-Ad* (J-integral and a new load-independent unified constraint parameter Ad*) with considering both in-plane and out-ofplane constraints has been investigated for semi-elliptical surface cracks in plates under bending. The crack initiation locations and fracture initiation loads for different crack sizes have been comparatively predicted and analyzed by using the two-parameter J-Ad* and the conventional single-parameter J-integral. The predicted results based on the two-parameter J-Ad* approach have been verified by finite element simulation based on the GTN (Gurson-Tvergaard-Needleman) micromechanics model. The results indicate that the two-parameter approach can provide more accurate predictions. The conventional single parameter approach can produce conservative (for shorter and shallower cracks) or non-conservative (for longer and deeper cracks) results. It is recommended that in the application of the two-parameter approach, for obtaining the best prediction accuracy, the two parameters should be calculated at the crack initiation location.