Abstract
Hydroforming has many advantages over other processes, especially when runs are small and shapes are complex. The hydroforming process of automobile front transom was simulated by FEM, which is based on elastic-plastic finite element method and BT shell element theory. The effect of forming process parameters such as internal pressure loading path and initial tube size were simulated and discussed. The simulation results indicated that suitable initial tube size and loading path can observably improve the distribution of the thickness and forming limit of the tube. And for the front transom, tube size Ø55mm and bilinear loading path are the best process parameters.
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