Finite Element Analysis of Ballistic Impact on Monolithic and Multi-layered Target Plate with and Without Air Gap

Abstract

In the present work, Finite Element Analysis is applied to analyze the ballistic impact on 1100-H14 aluminum and weldox 460 E steel multi-layered plate using FEM package ABAQUS/CAE explicit. A conical projectile is projected on the plate with different velocities. The 1100-H14 aluminum plate is model using Johnson–Cook material modeling and the Bao-Wierzbicki failure model is used for fracture. The Cut-off on negative triaxiality has been incorporated in the present work. The values of material parameters such as elastic and plastic are taken from the literature and the projectile is assumed to be rigid. Fracture pattern of the plate, residual velocity, and velocity drop on different thicknesses of plates are calculated. The number of petals formed in the plate after the fracture has been reported and the maximum deformation experienced by the plates are studied. It is found that the fracture pattern by the numerical analysis on the plate is almost similar to the experimental result as reported in the literature. And also the ballistic performance of multi-layered metal plates with and without spaced, subjected to impact by blunt projectile is investigated by numerical simulation. Further, the effect of the air gap on ballistic resistance is investigated. Ballistic limit velocities of layered plates are decreased with multi-layered target. The residual velocity, ballistic limit velocity and perforation time are determined. The result also showed that there is a consistent increase in ballistic resistance of target as the number of layered is increased.