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http://dx.doi.org/10.12989/scs.2017.24.2.191

Ballistic impact response of Kevlar Composites with filled epoxy matrix  

Pekbey, Yeliz (Ege University, Department of Mechanical Engineering)
Aslantas, Kubilay (Afyon Kocatepe Faculty of Technology Department of Mechanical Engineering ANS Campus)
Yumak, Nihal (Afyon Kocatepe Faculty of Technology Department of Mechanical Engineering ANS Campus)
Publication Information
Steel and Composite Structures / v.24, no.2, 2017 , pp. 191-200 More about this Journal
Abstract
Impact resistance and weight are important features for ballistic materials. Kevlar fibres are the most widely reinforcement for military and civil systems due to its excellent impact resistance and high strength-to-weight ratio. Kevlar fibres or spectra fiber composites are used for designing personal body armour to avoid perforation. In this study, the ballistic impact behaviour of Kevlar/filled epoxy matrix is investigated. Three different fillers, nanoclay, nanocalcite and nanocarbon, were used in order to increase the ballistic impact performance of Kevlar-epoxy composite at lower weight. The filler, nanoclay and nanocalcite, content employed was 1 wt.% and 2 of the epoxy resin-hardener mixture while the nanocarbon were dispersed into the epoxy system in a 0.5%, 1% and 2% ratio in weight relating to the epoxy matrix. Specimens were produced by a hand lay-up process. The results obtained from ballistic impact experiments were discussed in terms of damage and perforation. The experimental tests revealed a number of damage mechanisms for composite laminated plates. In the ballistic impact test, it was observed whether the target was perforated completely penetrated at the back or not. The presence of small amounts of nanoclay and nanocalcite dispersed into the epoxy system improved the impact properties of the Kevlar/epoxy composites. The laminates manufactured with epoxy resin filled by 1 wt.% of nanoclay and 2 wt% nanocalcite showed the best performance in terms of ballistic performance. The addition of nanocarbon reduced ballistic performance of Kevlar-epoxy composites when compared the results obtained for laminates with 0% nanoparticles concentration.
Keywords
ballistic impact performance; nanoclay; nanocalcite; nanocarbon; Kevlar; lightweight armour;
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