Analysis of steady axisymmetric metal plastic working processes

Based on Hill’s method a general procedure to derive approximate equilibrium equations for steady axisymmetric flow of an incompressible material, is developed. A model of rigid-plastic hardening material with yield stress depending on internal parameters is considered. These parameters are connected with the changes in metal structure under mechanical processing without regard to thermal effects. At the description of the deforming process kinematics a special co-ordinate system in introduced connected to stream lines.