AN ANALYTICAL PENETRATION MODEL BASED ON THE NORMAL CAVITY-EXPANSION THEORY

摘要

To suit the normal cavity expansion of concrete target penetrated by a projectile, a Normal Curve Surface (NCS) coordinate system is constructed. Considering the dynamic behavior of material under high-velocity and high-pressure shock and assuming that the particle velocity, the wave propagation and the pressure are all in the normal direction of outer surface of the projectile nose, a set of dominating equations are established. The analytical solution of resistant forces on the projectile-nose is obtained. Some calculations and comparisons with tests are made.