An analysis of springback in sheet metal bending using finite element method (FEM)

A large deformation algorithm based on Total-Elastic-Incremental-Plastic Strain (TEIP) was used for modeling a typical sheet metal bending process. The bending process involves large strain, rotation as well as springback due to elastic recovery of the material. A finite element method (FEM) software based on TEIP strain that is capable of handling large rotation and elastic recovery was employed. In this investigation, the prediction of springback was essentially carried out as numerical experiment and the results are presented in terms of springback ratio. In particular, this study examines the effect of load on springback varying the thickness as well as the radius of the die. The numerical results agree with the experimental ones with a reasonable accuracy.