Influence of Impact Velocity and Steel Armour Hardness on Breakage of Projectile 14.5 × 114 API/B32

The goal of this article was focused on study of projectile breakage after impact on steel armour depending on projectile impact velocity and steel armour hardness. Steel armour samples of hardness HBW500 and HBW600 were impacted by steel core projectile 14.5 x 114 API/B32 using three different impact velocities. The depth of projectile penetration into witness steel armour of hardness HBW400, which was placed 65 mm behind the steel armour samples, was measured. The projectile remains after each impact were searched. For better visualization of projectile breaking process after impact on steel armour the numerical simulations were performed. Experimental and numerical results were compared and combined in graph showing dependence of depth of penetration on projectile impact velocity for two different steel armour hardnesses and with indication of projectile coherence after impact.