schmidt-ishlinskii yield criterion and a rotating cylinder with a ‎rigid inclusion

An elastoplastic rotating cylinder with a rigid inclusion and fixed ends is investigated. the analysis is based on infinitesimal strain theory, schmidtishlinskii yield criterion, and its associated flow rule and perfectly plastic material behavior. both loading and unloading stages are studied. the closedformed solutions for all stages of deformation including secondary plastic flow are obtained. the results are illustrated by the distributions of the stresses and plastic strains in a cylinder rotating at different speeds.