Development of Yield Strip Models Using the Surface Integral and Finite Element Hybrid Method
The further development of the Surface Integral and Finite Element Hybrid method for modelling yielding of the material at a crack tip is presented in this paper. The crack in an infinite domain is modelled using a dislocation based integral equation formulation. The uncracked finite body is modelled using finite elements and these two models are coupled using linear superposition for solving the problem of a crack in a finite domain. The yield strips are lumped models that can model small-scale plastic yielding and are useful for both plane stress and plane strain situations. Results obtained using the hybrid formulation are in good agreement with those obtained using the classical Dugdale-Barenblatt and Bilby-Cottrell-Swinden models.
KeywordsLinear Elastic Fracture Mechanic Infinite Domain Integral Equation Formulation Finite Element Hybrid Method Yield Strip
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