Damage and fracture simulation during the extrusion processes Original Research Article

In order to accurately predict the damage and failure evolution in the case of metal forming processes, such as stamping and extrusion, a finite element model valid for numerically describing of such processes has been developed. Damage and crack propagation have been taken into account by means of continuum damage mechanics concepts. To study the effects of variation of processes parameters on the geometry of the workpiece, we have implemented a calculation algorithm by means of the user routine (UMAT) of ABAQUS/Standard finite element code. This model enables deformation and fracture initiation to be examined under several different loading conditions. An example is also given to illustrate the potential applicability of the model. The numerical results obtained by the simulation were compared with experimental ones in order to verify the validity of the proposed finite element model.