Abstract
This chapter illustrates the use of the general framework provided by thermodynamics on plasticity, viscoplasticity, and viscoelasticity. The chapter first presents the general plasticity equations and then gives examples of the establishment of some specific and typical plasticity models. The chapter recovers all fundamental equations of general plasticity in a fashion that fulfills all formal thermodynamical requirements. The chapter further recalls a few results about the concepts of a convex function and a convex set of points. There exist two major concepts when formulating viscoplasticity: the Perzyna and the Duvaut-Lions format. The chapter investigates Maxwell and Kelvin viscoelasticity in their generalized forms.
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