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

Anotace: The goal of this article was focused on the 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 14.5×114 API/B32 using three different impact velocities. The depth of the projectile penetration into 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 their evaluation. For better visualization of the projectile breaking process after the impact on steel armour, the numerical simulations were performed. Experimental and numerical results were compared and combined in a graph showing the dependence of the depth of penetration on the projectile impact velocity for two different steel armour hardnesses and with indication of projectile coherence after impact.