An Upper Bound Solution for Axisymmetric Extrusion and Drawing Considering a Generalized Yield Criterion

The yield criterion of many metallic materials differs from the von Mises criterion. However, available upper bound solutions are almost all restricted to this objective present paper was derive an solution based on a generalized for evaluating extrusion and drawing force, assuming conical die. method conventional used in conjunction with development is necessary, since work function not readily expressed as explicit strain rate invariants if adopted. illustrated using numerical examples, which show effect limit load.