Comparative Analysis of Blast-Loading Response of UHMWPE and Aramid Composites Using Explicit Dynamics Approach

Ballistic composites are the most popular material in the defense industry due to their high specific strength and stiffness. This work aims to evaluate the mechanical behavior of ballistic grade composites under blast-loading scenarios using hydrocode implemented in LS-Dyna. Ultra-high molecular weight polyethylene (UHMWPE) and aramid composites are studied for various scaled distances under blast loading. Layered equivalent modeling is used to model the ballistic composites to get a realistic response. The blast response of UHMWPE composites has been computed in terms of central point displacement. The experimental data from the literature are used to validate the results of the finite element simulation. Further study has been carried out for the blast loading on the Kevlar/Epoxy. A comparative analysis of the blast response of UHMWPE and Kevlar/Epoxy composites under various blast-loading scenarios and standoff distances has been conducted. A detailed study has been performed on back face deformation and energy absorption of aramid and UHMWPE composites. Results indicate that UHMWPE composites performed better in most circumstances in terms of back face deformation and energy absorption.