FINITE ELEMENT ANALYSIS OF ROTARY-DIE EQUAL CHANNEL ANGULAR PRESSING

Abstract

In this paper, the finite element method (FEM.) was applied to analyze the plastic flow and strain hardening behavior of pure copper, subjected to rotary-die equal channel angular pressing (RD-ECAP) up to four passes. The die was rotated 90' counter clockwise between the passes in the simulation. The effective strain distribution and load-stroke curves were investigated. The load was increased with the number of rotary-die equal channel angular pressing passes. The results show that, plastic deformation becomes inhomogencous with the number of passes due to an end effect, which was not found seriously in conventional equal channel angular pressing (ECAP). Especially, decreasing comer gap with increasing the number of passes was observed and explained by the strain hardening effect. (c) 2008 Elsevier B.V All rights reserved.