文献类型：期刊文献

英文题名：Numerical investigation on the creep crack-tip constraint induced by loading configuration of specimens

作者：Wang, G. Z.[1];Li, B. K.[1];Xuan, F. Z.[1];Tu, S. T.[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：79

起止页码：353

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20120114659973);WOS:【SCI-EXPANDED(收录号:WOS:000301276000022)】；

基金：This work was financially supported by the Project of the National Natural Science Foundation of China (50835003, 10772067, 51075149), and the National High Technology Research and Development Program of China (2009AA04Z409).

语种：英文

外文关键词：Creep; Crack-tip constraint; Loading configuration; Stress; Specimen

摘要：In this paper, the creep crack-tip constraint induced by loading configuration of specimens is quantitatively investigated by the finite element method. The results show the creep constraint induced by the loading configuration could be characterized and analyzed by the constraint parameter R. The specimen order in terms of the creep crack-tip constraint from high to low is compact tension, single edge-notched bend, single edge-notched tensile and middle-cracked tension specimen. With increasing C the constraint decreases in the specimens with different loading configurations. The effect of distances from the crack tips on the creep constraint parameter R is also analyzed. (C) 2011 Elsevier Ltd. All rights reserved.