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.
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页码：377 / 390
页数：14
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