Structural Engineering and Mechanics

  • 제34권3호
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  • Pages.377-390
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  • 2010
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

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)
  • 투고 : 2007.04.18
  • 심사 : 2009.11.16
  • 발행 : 2010.02.20
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

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피인용 문헌

  1. Green’s function for T-stress of semi-infinite plane crack vol.32, pp.8, 2011, https://doi.org/10.1007/s10483-011-1473-x
  2. A note on stress intensity factors for a crack emanating from a sharp V-notch vol.90, 2012, https://doi.org/10.1016/j.engfracmech.2012.04.023