摘要: A phenomenologically based viscoplastic model is derived for copper. The thermodynamically constrained by the condition of material dissipativity. Two internal state variables are considered. back stress accounts strain-induced anisotropy, or kinematic hardening. drag isotropic Static and dynamic recovery terms not coupled in either evolutionary equation. evolution depends on static recovery, while recovery. constants determined from isothermal data. Model predictions compared with experimental data thermomechanical test conditions. They good agreement at hot end loading cycle, but overpredicts response cold cycle.
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