文献类型：期刊文献

英文题名：Quantitative characterization of creep constraint induced by crack depths in compact tension specimens

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

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, MOE Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China

年份：2011

卷号：78

期号：4

起止页码：653

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20110513642217);WOS:【SCI-EXPANDED(收录号:WOS:000289704900003)】；

基金：This work was financially supported by the Key Project of the National Natural Science Foundation of China (50835003, 10772067), the National High Technology Research and Development Program of China (2009AA04Z409), and the Doctoral Fund of Ministry of Education of China (200802510003).

语种：英文

外文关键词：Constraint; Creep; Crack depth; Crack-tip stress; CT specimen

摘要：In this paper, the C(t) and C* integrals, stress redistribution time t(red) and creep crack-tip stress distributions in the CT specimens with various crack depths have been calculated by the finite element method (FEM), and the creep constraint induced by crack depths are quantitatively investigated in detail. The results show that the creep constraint could be characterized by the new constraint parameter R. The constraint effect induced by crack depths at non-steady-state creep is more pronounced than that at steady-state creep. The effects of the crack depths, load levels (C*) and distances from the crack tips on the creep constraint parameter R are analyzed. (C) 2010 Elsevier Ltd. All rights reserved.