Abstract: This paper describes a new method for obtaining optimal die shape which produces minimal stress in the extrusion or the drawing of nonaxisymmetric sections from round bar stock. The surface ...

Abstract: A new upper-bound solution is developed for the extrusion of polygonal sections through shaped dies. The surface of the die is generated by an envelope of curved lines drawn from points on ...

Abstract: Compressions tests on right, cylindrical steel specimens were performed in order to determine the stress-strain behavior. Lubrication was achieved by using a thin PTFE (Hostaflon) sheet on either ...