文献类型：期刊文献

英文题名：Three-dimensional numerical analysis of out-of-plane creep crack-tip constraint 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 Pressurized Syst & Safety, Shanghai 200237, Peoples R China

年份：2012

卷号：96-97

起止页码：78

外文期刊名：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

收录：;EI(收录号：20123115302544);WOS:【SCI-EXPANDED(收录号:WOS:000308262000009)】；

基金：This work was financially supported by the National Natural Science Foundation of China (50835003, 51075149) and the National High Technology Research and Development Program of China (2009AA04Z409).

语种：英文

外文关键词：Out-of-plane constraint; Creep; Specimen thickness; 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 compact tension (CT) specimens with various thicknesses have been calculated by the three-dimensional (3D) finite element method, and the out-of-plane creep crack-tip constraint induced by specimen thickness is quantitatively characterized and analyzed in detail. The results show that the out-of-plane creep crack-tip constraint in the CT specimens could be characterized and analyzed by the new constraint parameter R. The 3D creep crack-tip constraint increases with increasing specimen thickness, and the 3D effect becomes more pronounced with increasing the parameter C*. There is a central region with higher creep constraint along the crack front, the size of the region increases with increasing specimen thickness, and decreases with increasing creep time and parameter C*. The factors of influencing the out-of-plane creep crack-tip constraint are analyzed. (C) 2012 Elsevier Ltd. All rights reserved.