Energetic Parameters Analysis Of APFSDS Projectile Against Rolled Homogenous Armour For Enhanced Depth Of Penetration

Abstract

Armor Piercing Fin Stabilized Discarding Sabot (APFSDS) is an anti-tank projectile, highly energetic for piercing armored vehicles. Its capability is measured against the depth it penetrates the standard target material. Terminal ballistics is the most important phase to analyze besides interior and exterior ballistics. With the improvements in armor materials, the depth it penetrates is a great concern. Research is available for different calibers projectile impact analysis taking one or some of the aspects using either empirical/numerical modelling or experimentation. This is a comprehensive research on a ballistic impact analysis of 125 mm caliber projectile addressing maximum aspects of the penetrator (Geometry, Density, Slenderness Ratio, Obliquity Angle, and Energetic Density) using real time limitations of firing system. Energetic parameters for 460 mm penetration experimentally, has been validated in Willi Odermatt (W-O) ballistic empirical model. Using this, different combinations of energetic parameters have been deduced against depth upto 700 mm. Moreover, experimental case energetic parameters have also been validated in numerical model using ANSYS Explicit Dynamics with Johnson Cook (J-C) Strength and Failure Model along with Mie-Grüneisen equation of state. Analysis showed that slenderness ratio of 25.12 is required for 700 mm penetration depth