Rev.Adv.Mater.Sci. (RAMS)
No 2, Vol. 57, 2018, pages 199-211

COMPARATIVE ANALYSIS OF DYNAMIC PLASTICITY MODELS

N.S. Selyutina and Yu.V. Petrov

Abstract

In the paper, a new phenomenological interpretation of some of the principal temporal effects of high-rate plastic deformation of metals from a united viewpoint is represented. A comparative analysis of some of the well-known dynamic plastic deformation models is given. Influence of strain rate on the stress-strain relation in a wide range of strain rates for different types of aluminum alloys and steels is described by the relaxation model of plasticity, by original and improved empirical Johnson-Cook models, and by the phenomenological Rusinek-Klepaczko model. It is shown that the structural-time model ("the relaxation model of plasticity") is capable to effectively predict a wide spectrum of materials responses to fast and slow dynamic loading.

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