Analysis of crack opening stresses for center- and edge-crack tension specimens

被引：17

作者：

Tong Di-Hua ^{[1
]}

Wu Xue-Ren ^{[1
]}

机构：

[1] AVIC Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China

来源：

CHINESE JOURNAL OF AERONAUTICS | 2014年 / 27卷 / 02期

关键词：

Center- and edge-crack; Crack closure; Crack opening stresses; Crack surface displacements; Weight function method; FINITE-ELEMENT-ANALYSIS; STRIP-YIELD MODEL; CLOSURE; GEOMETRY; GROWTH;

D O I：

10.1016/j.cja.2013.07.007

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Accurate determination of crack opening stress is of central importance to fatigue crack growth analysis and life prediction based on the crack-closure model. This paper studies the crack opening behavior for center-and edge-crack tension specimens. It is found that the crack opening stress is affected by the crack tip element. By taking the crack tip element into account, a modified crack opening stress equation is given for the center-crack tension specimen. Crack surface displacement equations for an edge crack in a semi-infinite plate under remote uniform tension and partially distributed pressure are derived by using the weight function method. Based on these displacements, a crack opening stress equation for an edge crack in a semi-infinite plate under uniform tension has been developed. The study shows that the crack opening stress is geometry-dependent, and the weight function method provides an effective and reliable tool to deal with such geometry dependence. (C) 2014 Production and hosting by Elsevier Ltd. on behalf of CSAA & BUAA.

引用

页码：291 / 298

页数：8

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