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Stress Intensity Solutions for Cracked Orthotropic Plates

2013; Volume: 3; Issue: 5 Linguagem: Inglês

2165-9303

A. Toubal, A. Sahli, Said Kebdani, O. Rahmani,

Fatigue and fracture mechanics

In this paper, fracture mechanics in orthotropic plates, stress and displacement distributions around the crack tip in an an isotropic material are considered. Classical d isplacement based finite elements, elements with penalized equilibriu m and elements with drilling degrees of freedo m are emp loyed. The path independent integrals J and I * are applied to orthotropic fracture mechanics problems to determine the stress intensity factor at the crack tip. Again, convergence studies are done, and the path independence of J and I * are investigated for orthotropic problems. Nu merical results for typical fracture specimens are presented and discussed. The effect of the degree of anisotropy and fiber orientation on the stress intensity factor is also demonstrated.