Survivability of Penetrators with Circumferential Shear-Control Grooves

摘要

Small, cylindrical, steel projectiles containing circumferential grooves were fired against simulated concrete and steel-plate targets to investigate possible effects of shear-control grid placement on the survivability of impacting warheads. The projectiles fired against simulated concrete developed a bulge near the front of the internal cavity. The presence of a groove in this region significantly reduced the breakup velocity, while a groove a short distance to the rear had no effect on survivability. Thus, a shear-control grid could be machined from slightly behind the bulge to the rear of a warhead case without reducing survivability while, at the same time, maintaining a significant amount of fragmentation control. Against steel-plate targets, damage to the projectile was confined primarily to the front end, and a groove in the internal cavity, whether at the bulge location or behind it, had little effect on structural survivability.