The study is concerned with the analysis of high reduction plane strain ring rolling by the rigid-plastic finite element method. The rigid-plastic finite element formulation is one of the most efficient numerical tools to obtain detailed informations including the distribution of stresses and strains in the analysis of metal forming processes.
In the ring rolling analysis, the treatment of the boundary conditions at the roll-workpiece interface is very important for a successful analysis. In this study the modified functional is used to take into account the effect of the change of the neutral point and the pressure roll-workpiece interface is assumed to be frictionless to make the pressure roll torque zero.
The computational results of driven roll torques and roll separating forces are compared with those of the slip-line field method. It is shown that there is a reasonably good agreement in roll torques and roll separating forces between the present method and the slip-line method.
