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http://dx.doi.org/10.12989/sem.2010.34.3.377

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

Li, X.F. (School of Civil Engineering and Architecture, Central South University)
Tang, B.Q. (School of Mathematics and Computational Science, Changsha University of Science and Technology)
Peng, X.L. (School of Civil Engineering and Architecture, Central South University)
Huang, Y. (School of Civil Engineering and Architecture, Central South University)
Publication Information
Structural Engineering and Mechanics / v.34, no.3, 2010 , pp. 377-390 More about this Journal
Abstract
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 ${\sigma}_{\theta}$-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.
Keywords
crack kinking angle; T-stress; crack growth; biaxiality ratio;
Citations & Related Records

Times Cited By Web Of Science : 1  (Related Records In Web of Science)
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