Numerical simulation of ballistic impact on aluminium 5083-H116 plate with Johnson cook plasticity model

Abstract

Nowadays, a numerical simulation study using finite element method is very famous among the engineers and scientists, because it not only reduces the cost of the entire project but also saves a lot more time. The results of the numerical simulations needed to validate through experiments. So, we can say that numerical simulation studies reduce the no. Of experiments taken, if it cannot eliminate. In this research, a ballistic impact on the aluminium AA5083-H116 plate by using a rigid steel projectile is examined through numerical simulations in LS-Dyna Solver by using Johnson-Cook (J-C) failure model, which uses a 3-Dimensional nonlinear dynamic finite element code which is explicit in nature. The J-C plasticity model is used for simulation because it can capture large strain, strain rate hardening, and fracture encountered at high-velocity ballistic impacts. The aluminium plate is impacted by a rigid projectile with six different velocities. In the deformed plate, the variation of pressure on the plate at different points during impact, residual projectile velocity and the variation of axial and shear stresses are evaluated and studied. The results obtained from this research may be used to understand the failure behaviour of aluminium alloys, which can be used in the design and fabrication of lightweight bulletproof vehicle outer surface, thin armour portable shelters, and in other engineering applications.