DYNAMIC FRAGMENTATION AND PERFORATION BEHAVIOR OF REACTIVE PELE PROJECTILES

Abstract

This study investigates the fragmentation dynamics and damage characteristics of Penetrators with Enhanced Lateral Effects (PELE) using inert (PTFE) and reactive (Viton/Al, BDOFP/ CuO/Al) fillings. High-velocity impact experiments coupled with Smoothed Particle Hydrodynamics (SPH) simulations were performed to analyze axial and radial velocities of the projectile, fragment dispersion, and witness plate perforation. Reactive fillings significantly enhanced lateral dispersion and induced broader fragment distributions and extensive witness plate damage, as evidenced by larger central and dispersed perforations. Inert PTFE demonstrated limited lateral effects, retaining higher axial velocities and more localized damage. Numerical simulations aligned well with experimental observations qualitatively, capturing key trends despite some deviations in radial dispersion. This study highlights the critical role of material reactivity and energy redistribution in governing PELE fragmentation and impact damage. The findings offer insights for optimizing projectile designs in defense and engineering applications requiring enhanced lateral effects.