ON THE PSEUDOMATERIAL APPROACH FOR THE ANALYSIS OF TRANSIENT FORMING PRECESSES

A fixed-mesh method for the analysis of transient forming processes is presented. The mesh covers material regions and zones through which t he material may flow. These last zones are identified by a pseudomater ial with relatively small physical parameters. During time processing, the interface between both materials is followed by an arbitrary Lagr angian mesh. This technique appears to be suitable for the treatment o f moving surfaces with sharp corners. A particular boundary condition for the Navier-Stokes equations is also introduced in order to model a porous wall.