Numerical Simulation of Aluminum Alloy Forming Using Underwater Shock Wave

In recent years, on automobile industry, the car has body using aluminum alloy. As for this material, #5000’s, 6000’s and 7000’s aluminum alloy is used well. 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 these are little elongation compared with major steel. We considered application of the explosive forming. Therefore, we have tried free forming of aluminum alloy as the basic study. We compared the elongation of aluminum alloy by the explosive forming with punching. Consequently, it was larger for the amount of deformation of aluminum alloy by the explosive forming. In addition, we have done a theoretical elucidation. It is important the investigation of deformation process of aluminum plate by the explosive forming. Therefore, we solve using the numerical simulation by LS-DYNA. In this simulation, it carried out detonation process of the explosive, propagation process and deformation process of aluminum alloy.