Residual Velocity of Rigid Projectiles Perforating Concrete Barriers

Abstract

The residual velocity of a projectile, in case of perforation, is an important parameter in designing a protective structure. The residual velocity is a measure of the resistance level provided by the barrier when it is breached. It is also an important parameter in studying the response and resistance of barriers. The current work presents a formula to estimate the residual velocity of a perforating nondeformable projectile. It is based on an energy balance that includes physical assumptions related to the damaged barrier, and it requires knowledge of the perforation velocity. Subsequently, an expression for the residual velocity is formulated. The model parameters have been calibrated according to a set of published experimental data and it shows good agreement with other published experimental measurements