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In this paper we present a thermodynamically consistent material model whichis capable of modelling ductile-to brittle failure mode transition in ductilematerial undergoing deformations at high strain rates, and demonstrate theperformance of the model in a numerical study using a fully coupledthermal-structural finite element analysis of a notched aluminium alloyspecimen loaded in cyclic tension. The model is based on an objectiverepresentation of the deformation and stress measures and on a rate typeconstitutive equations. It does not only complies with the principles ofmaterial modelling, but it also uses constitutive equations, evolutionequations and even "normality rules" during return mapping which can beexpressed in terms of power conjugate stress and strain measures, or theirobjective rates.

A Thermoelastoplastic Material Model for Finite-Strain Cyclic Plasticity of Metals