In recent years, aluminum alloy is being used to fabricate car bodies. #5000’s or 6000’s aluminum alloy series is widely employed. However, the sheet metal forming of these materials by the static method, such as the hydro bulge forming and general punching, is very difficult, because the formability characteristics are limited when compared to majority of automobile steels. Hence, the choice of explosive forming is considered for forming these aluminum alloys. Te elongation of aluminum alloy by explosive forming is compared with that obtained by punching. The amount of deformation of aluminum alloy by the explosive forming is found to be larger. In addition, a theoretical elucidation is also done. FDM scheme was employed to solve the numerical simulation. In this simulation the detonation process of the explosive, propagation process and deformation process of aluminum alloy were conducted.

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