STUDY THE SYMMETRIC- PLASTIC DEFORMATION MECHANISM OF CIRCULAR SHEETS IN CYLINDRICAL DIE

Abstract

In this study a numerical procedure was proposed for the design of deep drawing process using finite element method (F.E.M) through program code (ANSYS 11) simplified 2-D ax symmetric model of conical cup are been developed. This research thoroughly investigates the axsymmetric deformation mechanism to evaluating the formability of sheet metals and to study the effect of some parameters which influence the drawing process such as: Die geometries, friction coefficient, It reveals how plastic regions in a work piece appear and spread and how they vary with punch diameter and also shows the distributions of strains , internal forces and proposes approximate model for engineers than analyses the deformation of such work pieces and evaluate the formability of metal materials.The prediction of the plastic wrinkling of a sheet during forming operation in the experimental study is a good agreement with the present numerical analyses are carried out for work pieces of thicknesses 1.5 mm and 2 mm with diameters 120 mm and 150 mm respectively, The diameters of cylindrical punches are 45 mm and 65 mm respectively, using Ansys 11 program which was recently developed and has good prospects for engineering applications.