A BEM FEM FRAMEWORK FOR SIMULATION OF A PLASTIC WORKPIECE DEFORMED BYAN ELASTIC TOOL

A solution methodology is developed for the simulation of a plastic wo rkpiece deformed by a compliant tool. The solution for elastic tool di splacements is based on the Boundary Element Method (BEM); the viscopl astic response of the workpiece is computed using the Finite Element M ethod (FEM). At each time increment, tool deflections are recomputed f rom the elastic solution based on surface tractions developed in the p revious converged solution for the viscoplastic response of the workpi ece material. Tool stresses may be recovered at any point in the simul ation using the BEM solution. The updated tool geometry and motion cor respondingly modify the kinematic contact constraint applied in the vi scoplastic solution over the subsequent time step. Application of this methodology is demonstrated for simulation of a plane strain forging operation.