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Symmetric weak-form integral equation method for three-dimensional fracture analysis. (English) Zbl 0906.73074
A symmetric Galerkin boundary element method is developed for the analysis of linearly elastic isotropic three-dimensional solids containing fractures. The formulation is based upon a weak-form displacement integral equation and a weak-form traction integral equation. These integral equations are only weakly singular, and their validity requires only that the boundary displacement data are continuous, hence, allowing standard C 0 elements to be employed. As part of the numerical implementation, a special crack-tip element is developed which has a feature in that there exist degrees of freedom associated with the nodes at the crack front.

MSC:
74S15Boundary element methods in solid mechanics
74R99Fracture and damage