Analysis of EFP and single sandwich ERA interaction

Abstract

Explosively Formed Projectiles (EFPs) are used to attack armored vehicles, on the other hands the armored vehicles use Explosive Reactive Armor (ERA) to enhance their protection. Using LS-DYNA software, this paper studies the problem of interaction of EFP with single sandwich ERA. The effect of various ERA configurations like the thickness of metal flyer plates/explosive and the inclination angle of ERA is analyzed against an EFP. The study concludes that the effect of light ERA i.e. with flyers upto 5mm is limited and the residual EFP still has enough energy to penetrate significant thickness of steel target, however when the ERA configuration is changed to heavier steel plates, most of the EFP is consumed during interaction with the ERA and only a small portion reaches the steel target, which does not have sufficient energy to penetrate the target. The simulation results were validated by testing the EFP against ERA.

Effect of Explosive Reactive Armour Cover Plate on Interaction of ERA and Explosively Formed Projectile

“…e EFP has 5 mm thick steel casing and is point initiated at the top. Similar EFP has also been used in the study previously carried out by Rasheed et al [4] to study the interaction of the EFP with ERA. is EFP has been designed based on the relationships presented by Weimann [6] for the effect of various physical parameters of the warhead on the EFP formation.…”

“…Since the ERAs are widely used to enhance the protection of the armoured vehicles, it is very likely that during the top attack engagement of armoured targets with EFP warhead, the EFP will interact with the ERA. e interaction of EFP and ERA sandwich alone has been studied by various researchers including the authors [2][3][4][5].…”

Penetration Capability of EFPs Against Explosive Reactive Armor

“…A 10/5/15-mm ERA significantly con-sumed the EFP by more than 75 %. The disruption of EFP depended more on the thickness of the ERA than on the inclination angle [16].…”