Relaxation model of dynamic plastic deformation of materials

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 characteris...

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Bibliographic Details
Published inMechanics of solids Vol. 49; no. 6; pp. 635 - 642
Main Authors Borodin, I. N., Petrov, Yu. V.
Format Journal Article
LanguageEnglish
Published Heidelberg Allerton Press 01.11.2014
Subjects
Classical Mechanics
Physics
Physics and Astronomy
dislocation
sharp yield point
yield point
plasticity relaxation model
whisker
characteristic relaxation time
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Summary: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.
ISSN:0025-6544
1934-7936
DOI:10.3103/S0025654414060041