DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 1761 - 1766
Section Numerical Simulations
Published online 15 September 2009
DYMAT 2009 (2009) 1761-1766
DOI: 10.1051/dymat/2009248

Ballistic performance of laminated composites against military impactors: Experimental and numerical studies

N. Nayak1, A. Banerjee1 and A.L. Dutta2

1  Proof & Experimental Establishment, Defence Research & Development Organisation, Chandipur 756025, India
2  Reader (retd) F M Autonomous College, Balasore, India

Published online: 15 September 2009

Ballistic impact response of composite laminates consisting of plain woven Twaron® aramid fabric and chemically modified epoxy resin against a 7.62 mm armour piercing projectile fired from a rifled gun has been reported in this paper. Laminated composite panels of size 300 mm×300 mm and thickness varying from 10 mm to 25 mm were fabricated by varying the number of fabric layers. The projectile impact velocity was varied by adjusting propellant charge mass. Impact (striking) velocity (SV), post perforation (residual) velocity (RV) and Ballistic Limit (BL) have been determined in each case. Residual velocity as a function of striking velocity has been generated for the composite laminates from which ballistic limits for different thickness have been determined. Projectile-target interaction has been analysed through high-speed imaging. Fibre breaking, pull out and delamination were observed to be the principal modes of failure. Internal damage area has been determined through ultrasonic C-scan technique. Attempt has been made to numerically simulate the impact using a commercial Finite Element package Ansys-Autodyne 2D. Close agreement between experimental and simulated data was observed.

© EDP Sciences 2009