On the dynamics of micropores in incompressible viscoelastoplastic media under active loading and subsequent unloading

In the framework of the theory of large deformations, the solution of one-dimensional boundary-value problem of determining the stress-strain state of the material with elastic, viscous and plastic properties in the vicinity of a single spherical continuity defect under loading and subsequent unloading is obtained. Constitutive relations governing the motion of an elastic-plastic boundary are determined. The level and distribution of residual stresses are calculated. Conditions for the occurrence of a secondary plastic flow during unloading are presented.