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Acta Mechanica Solida Sinica

, Volume 19, Issue 3, pp 223–230 | Cite as

A moving crack in a nonhomogeneous material strip

  • Baolin Wang
  • Jiecai Han
Article

Abstract

This paper considers an anti-plane moving crack in a nonhomogeneous material strip of finite thickness. The shear modulus and the mass density of the strip are considered for a class of functional forms for which the equilibrium equation has analytical solutions. The problem is solved by means of the singular integral equation technique. The stress field near the crack tip is obtained. The results are plotted to show the effect of the material non-homogeneity and crack moving velocity on the crack tip field. Crack bifurcation behaviour is also discussed. The paper points out that use of an appropriate fracture criterion is essential for studying the stability of a moving crack in nonhomogeneous materials. The prediction whether the unstable crack growth will be enhanced or retarded is strongly dependent on the type of the fracture criterion used. Based on the analysis, it seems that the maximum ‘anti-plane shear’ stress around the crack tip is a suitable failure criterion for moving cracks in nonhomogeneous materials.

Key words

nonhomogeneous materials fracture mechanics moving crack 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2006

Authors and Affiliations

  • Baolin Wang
    • 1
  • Jiecai Han
    • 1
  1. 1.Center for Composite MaterialsHarbin Institute of TechnologyHarbinChina

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