Abstract
This paper presents an analysis of mixed mode fracture mechanics problems arising in anisotropic composite laminates. The boundary element method (BEM) and the J k integral are presented as accurate techniques to compute the stress intensity factors K I and K II of two dimensional anisotropic bodies. Using function of a complex variable a decoupling procedure is derived to obtain the stress intensity factors. The procedure is based on the computation of the J 1-integral and of the ratio of relative displacements at the crack faces, near the crack tip. Applications are presented for unidirectional and symmetric laminates of glass, boron and graphite-epoxy materials. Numerical examples of problems of pure mode I and mixed mode deformations are given, in order to demonstrate the accuracy of the method.
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Sollero, P., Aliabadi, M.H. Fracture mechanics analysis of anisotropic plates by the boundary element method. Int J Fract 64, 269–284 (1993). https://doi.org/10.1007/BF00017845
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DOI: https://doi.org/10.1007/BF00017845