Fracture mechanics analysis of anisotropic plates by the boundary element method |
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Authors: | P Sollero M H Aliabadi |
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Affiliation: | (1) Wessex Institute of Technology, University of Portsmouth, SO4 2AA Ashurst, Southampton, UK;(2) Computational Mechanics Department, University of Campinas, Brazil |
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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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