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An implementation of the unified theory of visco-plasticity of Bodner in a three-dimensional finite element program for the analysis of anisotropic inelastic behaviour of selected metals is presented in this paper. A derivation of an effective hardening parameter for the anisotropic (directional) deformation state is also given in this paper using some basic assumptions introduced by Bodner. The effect of the imposed strain rate on the level of the stress–strain curve is also investigated. A comparison of the results of the present finite element model with some published theoretical and experimental results for pure titanium and 2024-T4 aluminium alloy is also made. 相似文献
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