Numerical study on formation and penetration of hemispherical liner

Abstract

The formation and penetration process of the explosively-formed projectile (EFP) used as an anti-tank mine is simulated with AUTODYN-2D. Since the caliber of this EFP is large (110 mm), but its stand-off is low (about 500 mm), it is difficult to record its formation using high-speed photography or X-ray. Therefore, numerical modeling is adopted to investigate the whole process. The constitutive model and material parameters of the copper liner are verified by simulating the experiments from the literature. Then the formation and penetration of the EFP are simulated using the fluid-solid coupling method, and the numerical results agree well with experimental data. Besides, the effect of the shell thickness is studied. It is worth noting that the shell has a great influence on the formation shape, but little on the penetration depth.