A Fully Regularized Direct Boundary Formulation For Three-dimensional Elastoplastic Problems
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B. Burghardt & A. Le Van
A fully regularized direct boundary formulation for three-dimensional elastoplastic problems B. Burghardt & A. Le Van en'a%%, Eco/e CWra/e 6/e Email: Bertrand.Burghardt@ec-nantes.fr Abstract The present work is devoted to a fully regularized boundary formulation for three-dimensional elastoplastic problems. The proposed algorithm is based on an integral representation of the strain field in which no integrals have to be understood in the principal value sense. Following the current ap- proach used in Finite Element procedures, an initial strain formulation and an implicit integration scheme are considered. The elastoplastic relation- ships take into account an isotropic and linear kinematic hardening material satisfying the von Mises criterion. 1 Introduction It is well established that the boundary formulation can be applied to various problems presenting geometrical or material nonlineari- ties (Mukherjee & Chandra ).