Penetration of an optimal depleted uranium liner of a shaped charge: A numerical simulation method

Abstract

Depleted uranium (DU) has surprising physical properties such as a high density, high hardness, and high toughness. A numerical method was developed in AUTODYN to study the penetration performance of a shaped charge with a liner made of DU with 0.75% titanium. By comparing different parameters and results from different models, the strength model suitable for DU was determined. According to available experimental data, the geometric strains in the strength models for DU and the steel target were calibrated. The characteristics of the DU liner, employed in a finished shaped charge instead of a copper liner, were optimized by tuning different parameters, and the performance of this optimal liner was verified through relevant tests. Moreover, in agreement with the optimized computational model and structural studies, a novel structure for the shaped charge was proposed that aimed to achieve a penetration depth of eight charge diameters. Different penetration depths were obtained by changing specific parameters, and the influence of standoff on the penetration depth was also studied. By evaluating the best penetration performance, the optimal structure for the shaped charge was finally determined. These results can have a great impact on future experimental tests and engineering applications of DU.