ANALYTICAL AND EXPERIMENTAL EVALUATION OF SPRING BACK EFFECTS IN A TYPICAL COLD ROLLED SHEET

Prediction of spring back for forming of a typical shape of Cold Rolled steel sheet has been carried out using FEM. The objective of this work is to predict the spring back in the form of a typical shape of cold rolled steel sheet and compare that with the actual spring back as occurs in experiment. A typical shape is designed using AutoCAD and Solidworks. Die and punch to form the shape has been designed using 2d and 3d modelling tools . T he Finite element simulation is done considering the material and geometric nonlinearity. Non - linear material properties are obtained from the tensile testing of the standard test specimen made from the same material and of same thickness. Geometric nonlinearity is considered by selectin g appropriate option in the FEM package. Die, punch and sheet are considered in the finite element analysis. Final deformed shape after occurrence of spring back has been obtained in the finite element analysis.