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Some thermodynamical considerations on inelastic deformations including damage processes

Research paper by Th. Lehmann

Indexed on: 01 Aug '89Published on: 01 Aug '89Published in: Acta mechanica



Abstract

A phenomenological theory of inelastic deformations including damage processes may be based on the fundamental assumption that the body can be considered as a classical continuum and that the principle of uniquely determined local thermodynamical state holds. Within this frame particular balance equations for energy and entropy can be stated describing the interaction between external energy supply and changes of the internal material structure. These balance equations are applied to elastic-plastic deformations including damage processes. The parameters describing the damage state can be considered either as thermodynamical state variables or merely as thermo-mechanical process variables. This distinction leads to different formulations.