Influence of elastic T-stress on the growth direction of two parallel cracks

被引：2

作者：

Li, X. -F. ^{[1
]}

Tang, B. -Q. ^{[2
]}

Peng, X. -L. ^{[1
]}

Huang, Y. ^{[1
]}

机构：

[1] Cent S Univ, Sch Civil Engn & Architecture, Changsha 410075, Hunan, Peoples R China

[2] Changsha Univ Sci & Technol, Sch Math & Computat Sci, Changsha 410114, Hunan, Peoples R China

来源：

STRUCTURAL ENGINEERING AND MECHANICS | 2010年 / 34卷 / 03期

基金：

中国国家自然科学基金;

关键词：

crack kinking angle; T-stress; crack growth; biaxiality ratio; FRACTURE;

D O I：

10.12989/sem.2010.34.3.377

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper studies fracture initiation direction of two parallel non-coplanar cracks of equal length. Using the dislocation pile-up modelling, singular integral equations for two parallel cracks subjected to mixed-mode loading are derived and the crack-tip field including singular and non-singular terms is obtained. The kinking angle is determined by using the maximum hoop stress criterion, or the sigma(0)-criterion. Results are presented for simple uniaxial tension and biaxial loading. The biaxiality ratio has a noticeable influence on crack growth direction. For the case of biaxial tension, when neglecting the T-stress the crack branching angle is overestimated for small crack inclination angles relative to the largest applied principal stress direction, and underestimated for large crack inclination angles.

引用

页码：377 / 390

页数：14

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