Improvement of Shaped Charge Penetration Capability and Disturbation of the Jet by Explosive Reactive Armor

Abstract

This paper presents a numerical study of the effect of main parameters (liner material, explosive charge, stand-off distance and the presence of the wave-shaper), on one hand, on the jet formation, jet velocity and the jet length, and on the other hand, on the penetration depth. We propose a numerical approach to evaluate their effects on the performance of the shaped charge. AUTODYN-2D software is used for numerical simulations of the shaped charge. The multi material Euler solver of the AUTODYN is used for the jet formation investigation, whereas, Lagrange solver is used for the resolution of the penetration problem. Results have shown that the presence of waveshaper increases the shaped charge depth penetration. For the standoff of 6 charge calibres, the jet penetration is found to be deepest. It is found that the jet velocity is proportional to the jet energy, and the penetration is proportional to the liner density. The oblique explosive reactive armor is more efficient for the protection of the main target. Numerical results have a good agreement with the data from available literature-with experimental results for the chosen explosives.

The efficiency of a small sized hand-made shaped charge

“…The phenomena associated with shaped charges include high explosive detonation and extreme deformations of the shaped charge casing and liner, which present a challenging task for the numerical analysis (Ugrčić and Ugrčić, 2009). Various numerical codes have been developed to simulate the penetration process, with the aim to accurately represent the physical aspects of penetration whilst minimizing computational time (Kemmoukhe et al, 2019). Computer programs that are used for numerical simulation of explosive action are known as hydrocode programs and are specialized for simulations in fluid dynamics (Draganić and Varevac, 2017).…”