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Temperature and rate dependent theory of plasticity of crystalline solids

1988; EDP Sciences; Volume: 23; Issue: 4 Linguagem: Inglês

10.1051/rphysap

2777-3671

P. Perzyna,

Microstructure and mechanical properties

The paper shows a new approach for formulation of temperature and rate dependent models of plastic behaviour of crystalline solids.It has several particu- lar objectives.The first is to give a very brief overview of recent developments of large strain constitutive laws for crystalline rate dependent plasticity.The second is to investigate how the main mechanisms on crystalline slip system can be incorpo- rated in the general framework of continuum rate dependent large plastic deformation constitutive structure.The internal state variables have been precisely interpreted.Based on main mechanisms for crystalline slip system the evolution equations for the internal state variables introduced are proposed.The third objective is to il- lustrate how to include additional features such as work hardening, thermal softening etc. in constitutive structure proposed.Next objective is to focus attention on tem- perature dependence of plastic behaviour.The final goal is the discussion how these propositions can be extended to develop theories for large deformation,temperature and rate dependent, polycrystalline behaviour.