Springback in High Strength Anisotropic Steel

This paper presents the finite element analysis and results of springback in a U-shape cross section made of high strength anisotropic steel. The results are compared with those obtained from two isotropic materials that have the same yield stresses as those of the principal directions of the anisotropic steel sheet. The principal directions are the directions of the sheet that have the largest and smallest yield stresses respectively. The results show the discrepancy between springback predicted by the isotropic and anisotropic materials, but also the variability of springback with respect to the angle of orientation of the anisotropic steel sheet. This may help address the question of when it is appropriate to use isotropic material properties for anisotropic materials when it comes to predicting springback.