Validation of the FE model in comparison to the experimental geometry measurements: The cross-sectional profiles of the membrane after hydroforming and springback are compared. The plots show the results along the rolling direction (a) and the transverse direction (b). The anisotropic simulation (“Sim.”, black line) shows an improved prediction of the geometry in relation to the experimental data (“Exp.”, green line) in comparison with the simplified isotropic model (“Sim.*”, orange line).