FINITE-ELEMENT ANALYSIS AND OPTIMIZATION OF SPRINGBACK REDUCTION - THE DOUBLE-BEND TECHNIQUE

According to the double-bend technique, springback can be reduced if t he U-channel is unbent and bent again at a new site. Thus springback i s a function of both the forming die gap and the plate opening. The pu rpose of this research is first to use the finite element method to an alyze the relationship between springback and the forming variables, a nd then to combine an optmization technique with the finite element an alysis to find the optimum forming parameters to reduce the springback . The solutions are compared with experimental data in the literature.