文献类型：期刊文献

英文题名：Unified correlation of in-plane and out-of-plane constraints with fracture toughness

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

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

年份：2014

卷号：37

期号：2

起止页码：132

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

收录：;EI(收录号：20140417234978);WOS:【SCI-EXPANDED(收录号:WOS:000330856000002)】；

基金：This work was supported by the Project of the National Natural Science Foundation (51075149), the National Key Technology R&D Program of the Ministry of Science and Technology (2011BAK06B02-04), the National High Technology Research and Development Program of China (2012AA040103), and the Fundamental Research Funds for the Central Universities of China.

语种：英文

外文关键词：equivalent plastic strain; fracture toughness; in-plane constraint; loading configuration; out-of-plane constraint; unified correlation

摘要：In this paper, the specimens with different geometries and loading configurations were used to study the unified correlation of in-plane and out-of-plane constraints with fracture toughness by using numerical simulation method. The results show that the unified constraint parameter A(p) which was defined on the basis of the areas surrounded by the equivalent plastic strain isolines ahead of crack tip can characterise both in-plane and out-of-plane constraints induced by different specimen geometries and loading configurations. A sole linear relation between the normalised fracture toughness J(IC)/J(ref) and root A(p) was obtained. The J(IC)/J(ref) -root A(p) line is a unified correlation line of in-plane and out-of-plane constraints with fracture toughness of a material, and the constraint dependent fracture toughness of a material can be determined from the unified correlation line. The results also demonstrate that the out-of-plane constraint effect is related to the in-plane constraint effect, and there exists interaction between them. The higher in-plane constraint strengthens the out-of-plane constraint effect, whereas the lower in-plane constraint is not sensitive to the out-of-plane constraint effect.