Abstract
By utilizing the multiplicative decomposition of deformation gradient, we precisely identify the elastic and plastic contribution to the velocity strain of elasto-plastically deformed anisotropic materials. Corresponding elastic stiffness and compliance tensors are obtained to within the unknown rotation tensor, to be additionally determined. Orthotropic materials are considered in particular and constitutive structure for their plastic strain-rate established. Various kinematic aspects and relationships between different plastic strain-rate and spin tensors, as well as comparison to related work, are also given.
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