A version of the metal plasticity relaxation model based on a plasticity integral criterion with the characteristic relaxation time parameter is suggested. The dislocation concepts of metal plasticity together with the Maxwell model for a strongly viscous fluid are used to show that this characteristic relaxation time parameter can be interpreted in terms of dissipation and energy accumulation in the case of mobile dislocations. The coincidence of the values of characteristic plastic relaxation time obtained for various descriptions of the whisker deformation allows one to conclude that the characteristic relaxation time is a basic characteristic of the material dynamic properties.
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Original Russian Text © I.N. Borodin, Yu.V. Petrov, 2014, published in Izvestiya Akademii Nauk. Mekhanika Tverdogo Tela, 2014, No. 6, pp. 41–49.
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Borodin, I.N., Petrov, Y.V. Relaxation model of dynamic plastic deformation of materials. Mech. Solids 49, 635–642 (2014). https://doi.org/10.3103/S0025654414060041