umat_documentation.rar - A user-material subroutine has been written to incorporate single crystal plasticity in the
fmite element program ABAQUS. The fmite-element formulation of elastic-plastic and viscoplastic
single crystal deformation is reviewed in this paper. including versions for small deformation
theory and for the rigorous theory of finite-strain and fmite-rotation. Inelastic deformation of a
single crystal arises from crystalline slip, which is assumed here to obey the Schmid law. Various
self and latent hardening relations between resolved shear stress and shear strain in slip systems are
presented and incorporated as options in the subroutine.,2012-01-31 01:59:21,下载57次