Topology Optimization of an Asymmetric Elliptical Cone Subjected to Blast Loading

This paper describes a numerical procedure for the blank shape design of thin aluminum components achieved by explosive forming. The objective is to specify the initial blank shape considering the geometry of the final product. The numerical procedure consists of three steps: At first, the forming process of an asymmetric blank in an elliptical cone die cavity and without blank holder is simulated. To rectify the wrinkles without optimization the square of the primary blank will be increased. In the next step, topology optimization is employed to obtain the optimum geometry of the blank whose diameter has been increased finally, the modified blank achieved previous step is used in the new simulation to check whether or not the wrinkles mentioned in first step has been rectified. Results show the proposed numerical procedure can provide the optimal blank shape in a few iterations.