Technique of Allowing for Plastic Strains Under Unloading in Thermoplasticity Problems for Axisymmetric Bodies

The nonaxisymmetric elastoplastic stress–strain state of bodies of revolution under nonisothermal combined loading is analyzed with allowance for secondary plastic strains. The study is based on the use of the constitutive equations of the theory of small-curvature processes and finite-element method. The model of elastic unloading of a material with perfect Bauschinger effect and isotropic hardening is employed. Numerical examples illustrate how the choice of an unloading model affects the results obtained.