Hemispherical nosed steel projectile high-speed penetration into aluminum target

摘要: Abstract Terminal ballistic performance of high-strength projectiles penetrating into metallic targets is mostly concerned by both weapon and armor designers. Most existing works are concentrated on the rigid-eroding penetration regime, limited studies have addressed rigid-deforming-eroding regime. In this paper, nineteen shots hemispherical nosed D6A steel test 5A06-H112 aluminum conducted with a wide range velocities (696 m/s–1870 m/s). The non-monotonic dependence depth (DOP) impact velocity observed, which successively corresponds to three stages, i.e., rigid projectile penetration, deforming without eroding penetration. Then, for applicability six classical theoretical models penetrations evaluated. Furthermore, transition (the upper limit lower penetration) discussed an empirical judgement criterion occurrence proposed. Finally, conducting dynamic compression test, quasi-static tension under varying temperature, etc., Johnson-Cook model parameters present target calibrated validated numerically simulating test.