Thermodynamic formulation of rate-dependent crystal plasticity model: Heat generation aspects

摘要

A thermodynamically consistent formulation of a rate-dependent crystal plasticity model is presented. The model, formulated within a thermodynamic framework, is suitable for use in thermomechanical analyzes where heat generation in textured materials is of importance. The model is based on the power-law flow rule and includes features such as latent-hardening, and kinematic hardening. The latent-hardening is controlled by internal variables that are included in the Helmholtz free energy. Together with the evolution laws a model providing a realistic and thermodynamically consistent heat generation due to plastic work can be formulated. The capabilities of the model are demonstrated in numerical examples that include uniaxially loaded poly crystalline materials with initial different textures.