Ballistic Impact Response of Woven Hybrid Coir/Kevlar Laminated Composites

A.R Azrin Hani,M.N Roslan,N.S Azman,N Marsi,M Mariatti,R Ahmad,S Sharif,M.M.A.B Abdullah,S.Z Abd Rahim,M.M Ramli,N Mat Saad,M.F Ghazali,S.A Zainol Murad,S.S Mat Isa

doi:10.1051/matecconf/20167801048

Abstract

The effects of different laminated hybrid composites stacking configuration subjected to ballistic impact were investigated. The hybrid composites consist of woven coir (C) and woven Kevlar (K) layers laminated together. The samples of woven coir were prepared using handloom device. The composites were produced by stacking the laminated woven coir and Kevlar alternately with the presence of the binder. The samples were tested under ballistic impact with different stacking configuration. The results obtained had successfully achieved the National Institute of Justice (NIJ) standard level IIA with energy absorption of 435.6 kJ and 412.2 kJ under the projectile speed of between 330 m/s and 321 m/s respectively. Samples that having Kevlar layer at the front face and woven coir layer as back face achieved partial penetration during projectile impact. This orientation is proven to have good impact energy absorption and able to stop projectile at the second panel of the composites.

Highlights

Body armour is a protective garment used to protect the body from any projectile penetration
Samples were tested at Science and Technology Research Institute of Defence (STRIDE), Batu Arang, Selangor for high-velocity impact test
The velocity used to be 368 m/s which categorized under National Institute of Justice (NIJ)-Standard level II

Summary

Introduction

Body armour is a protective garment used to protect the body from any projectile penetration. According to Cavallaro [1], the earliest invention that used body armour concept is using animal skin as well as Natural Fibre (NF) made from thatch, cotton, and silk that is woven to make a protective garment. The concept is evolved using a more advanced material such as iron, copper, steel that made into the plate to protect the body. The fibres being used need to be as strong as it could be. Synthetic Fibre (SF) has manipulated the production of body armour with its good mechanical properties. The most commonly used SF in body armor is the high performances fibre such as Kevlar and Twaron from aramid family, Ultra High Molecular Weight Polyethylene (UHMPE) and nylon

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