Comparison between 2D and 3D numerical modeling of superplastic forming processes Original Research Article

In this paper, the numerical results obtained by a finite element analysis in the case of superplastic sheet forming simulation are compared with the experimental ones to verify the validity of the finite element model (FEM) developed to predict the optimum pressure cycle, the deformed shapes, the distributions of the strain rate and the evolution of the thickness during the forming process. To compare the performance of 2D and 3D approaches, two analyses have been performed using a 2D model with 2D fully integrated continuum axisymmetric elements, and a 3D model with 3D fully integrated shell elements. Final results of the finite element modeling agree with the experimental ones.