ON RATE-DEPENDENT PLASTICITY - LINEAR VISCOELASTIC CONSTITUTIVE-EQUATIONS

Based on the previous work by the authors in which generalized constit utive equations and evolution laws for rate-independent plasticity wer e developed from the theory of internal state variables in irreversibl e thermodynamics, the present paper establishes rate-dependent constit utive relations which have more generality than those proposed by othe r authors. As a particular case, generalized linear viscoelastic const itutive relations are derived under the assumption that the process is isothermal, which are found to be identical with those obtained from the general linear viscoelastic model analysis.