Numerical investigation on the creep crack-tip constraint induced by loading configuration of specimens

被引：59
|
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
来源：
ENGINEERING FRACTURE MECHANICS | 2012年 / 79卷
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
Creep; Crack-tip constraint; Loading configuration; Stress; Specimen; TRIAXIALITY PARAMETER; FRACTURE; GROWTH; FIELDS; FAMILY;
D O I：
10.1016/j.engfracmech.2011.11.014
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
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.
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页码：353 / 362
页数：10
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