Numerical Study on the Effect of Spinning for 7.62 APM2 Projectile Impacting on Al 7075-T651 Target

Abstract

When a projectile launches from a rifled barrel, it undergoes rotation around its longitudinal axis, commonly referred to as spinning, to maintain stability during its flight through the air. Upon reaching the target, the projectile possesses both rotational and translational energies. This study examines the impact of rotational energy on the penetration of 7.62 APM2 projectiles by using Finite Element Analysis(FEA). Al 7075-T651 alloy with a thickness of 20mm is considered as target material. Initially, the model is validated using the experimental results available in the literature. The validated model has been extended to study the effect of the projectile’s spinning by using the Recht-Ipson parameters. Based on the results, it is observed that the rotation of the projectile leads to an enhancement in penetrating energy and a reduction in ballistic limit velocity.