Behaviors of Metal-based Reactive Fragments Penetrating Spaced Aluminum Targets

Ballistic impact experiments are conducted on metal-based reactive fragments impacting spaced targets to investigate the post-target debris cloud and damage effect behaviors of the reactive fragments, and to reveal the mechanism of their penetration. By observing the perforation mode of spaced target and the action behavior of fragments, we combine the breakage theory of target penetration, energy conservation law, and the reactivation response behaviors of reactive fragments to analyze and discuss the behaviors of reactive fragments penetrating spacer aluminum targets. The results show that the front target is plugging, and the rear target mainly presents the composite mode of center penetration and debris impact due to the kinetic energy-chemical energy coupling damage of post-target debris cloud. With increasing impact velocity, the reactive of reactive fragments increases. The theoretical model of the reactive fragments' post-target debris cloud is established, and the evolution law of debris cloud is obtained. At different impact velocities, the unit debris kinetic energy is negatively correlated with unit reaction mass at the position of the critical through aperture.