Simulation of “L” section extrusion using upper bound method

Metal flow pattern analysis in extrusion process is very important. The knowledge of how circular initial section of billet changes to final section will determine more details of extrusion process and have an important role in extrusion energy. In this research material, flow in extrusion of “L” section has been investigated by upper bound method. The results show that material in its plastic flow selects the path which needs minimum energy, so an optimum Limason shape intermediate section appears between initial and exit section.