Abstract
PELE projectile is a new type of armor-piercing warhead and has a more obvious fragmentation effect, which solves the problem of insufficient after-effects of conventional armor-piercing projectiles. Reactive material is a new type of energetic material, which has some characteristics similar to the traditional explosives but has better mechanical properties. Reactive material is insensitive under normal conditions, and it can release huge energy under external impact loading. This paper hopes to study the application of reactive materials to the inner core of PELE projectiles to further improve the fragmentation effect of PELE projectiles. The fragmentation effect of PELE projectile is mainly reflected in the radial scattering velocity of fragments after it perforates the target plate. In this paper, three energy sources for the radial scattering of fragments were obtained by analyzing the penetration process of PELE projectile, that is, the axial kinetic energy of outer casing, the radial compression potential energy generated by the inner core to the outer casing, and the chemical energy released by the reactive core material. Based on the simplification and assumptions, the theoretical model of radial scattering velocity of fragments of the reactive core PELE projectile was established. In addition, numerical simulations were carried out to verify the theoretical model. The results show that the numerical simulation results are in good agreement with the theoretical calculation results, which indicates that the model established in this paper is scientific and reasonable. The reactive core PELE projectile has a more significant fragmentation effect, which further enhances the comprehensive damage power of traditional PELE projectile. The theoretical model established in this paper can quickly assess the power of reactive core PELE projectile’s fragmentation effect, which can be used to provide guidance and reference for engineering application.
Highlights
PELE (Penetrator with Enhanced Lateral Efficiency) projectile is a new type of armor-piercing projectile, which transforms part of the axial kinetic energy into the radial kinetic energy by using the difference in material properties between the outer casing and inner core [1,2,3,4,5]
PELE projectile is mainly composed of high-density casing and low-density core, the outer casing is usually made of heavy metals such as steel or tungsten, while the inner core is made of inert materials such as plastic or aluminum with relatively weak penetration performance
Ignoring the energy dissipation caused by the deformation and breakage of outer casing, and it is considered that the compression potential energy stored in the inner core material due to Poisson effect and the chemical energy generated in the reaction are all released after perforating the target plate, which are all used to convert into the radial kinetic energy of fragments
Summary
PELE (Penetrator with Enhanced Lateral Efficiency) projectile is a new type of armor-piercing projectile, which transforms part of the axial kinetic energy into the radial kinetic energy by using the difference in material properties between the outer casing and inner core [1,2,3,4,5]. When the reactive material is applied to the inner core of PELE projectile, the reactive material can react and release energy actively after the projectile perforates the target plate It will make the casing rupture and generate more fragments with higher radial scattering velocity, and it may even ignite other targets behind the detonating target plate, causing physical and chemical double damage to the target. Based on the principle of energy conservation and shock wave theory, Verreault [15,16,17] constructed the theoretical model of radial scattering velocity of fragments of PELE projectile by considering the interaction between the outer casing and the inner core. Structural Simplification and Penetration Analysis of the Reactive Core PELE Projectile
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