Data Analysis and Simulation of High-Impact Projectile Shots

Full system CTH modeling of a titanium (Ti) projectile penetrating stainless-steel stack-up and Ammonium Perchlorate (AP) High-Performance Propellant (HPP) is presented. The effects of several mass and velocity (e.g. 1500-1700 meters per second) pairs on the propellant ignition are analyzed. We will first discuss the simulation details of stainless-steel plate penetration including effects of EOS and choice of material model parameters. Particular attention is paid to the comparison with experimental data obtained by high-speed cameras and X-Ray images. We next present modeling results of AP-HPP ignition sensitivity to the mass, velocity and temperature of fragments impacting it. Several CTH burn models are compared. Finally, we will talk about full system modeling where the only initial conditions are the dimensions of the Ti projectile and its pre-impact velocity. The effects of flat and tilted projectile impact as well as sensitivity to the variation in initial velocity will be discussed.