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Title: Dual boundary element method for axisymmetric crack analysis
Authors: Lacerda, LA
Wrobel, LC
Keywords: Boundary element method;Axisymmetry;Fracture mechanics;Modified crack closure integral method;Cauchy principal value;Hadamard principal value
Issue Date: 2002
Publisher: Springer
Citation: International Journal of Fracture, 113: 267-284
Abstract: In this paper a dual boundary element formulation is developed and applied to the evaluation of stress intensity factors in, and propagation of, axisymmetric cracks. The displacement and stress boundary integral equations are reviewed and the asymptotic behaviour of their singular and hypersingular kernels is discussed. The modified crack closure integral method is employed to evaluate the stress intensity factors. The combination of the dual formulation with this method requires the adoption of an interpolating function for stresses after the crack tip. Different functions are tested under a conservative criterion for the evaluation of the stress intensity factors. A crack propagation procedure is implemented using the maximum principal stress direction rule. The robustness of the technique is assessed through several examples where results are compared either to analytical ones or to BEM and FEM formulations.
ISSN: 0376-9429
Appears in Collections:Mechanical and Aerospace Engineering
Dept of Mechanical Aerospace and Civil Engineering Research Papers

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