Protection performance of dual flying oblique plates against a yawed long-rod penetrator

The protection capability of dual flying plates against a yawed long rod of enhanced L/D is evaluated numerically, where L is the length and D is the diameter of the rod. This study is motivated by the fact that the protection performance of dual plate system is governed by the extent of interaction between a yawed long rod and dual flying plates. The simulations are performed using a newly developed dynamic and impact analysis code, IPSAP/Explicit. The long-rods are L/D=15 and 30 with the velocity falling within the ordnance range (1.5 km/s) and hypervelocity range (2.5 km/s) respectively. The yaw angles are −6°, 0°, and +6°. The plate velocities are 0.2, 0.3 and 0.5 km/s. Through the simulation results, we find that dual flying plates system is more effective with longer rod due to the elongated disturbance. The protection performance is more effective for the penetrator with +6° of yaw angle than that with a yaw angle of −6°.