Abstract
Abstract In this study, the glass/epoxy composite laminate is layered with polyurethane foam/ polyurethane sheet and silicon carbide to analyse their response during high mass and low velocity impact. The silicon carbide is layered in two forms, one is as plate and the other is as inserts. The target materials are prepared in various combinations and the bonding of layers is done by using epoxy. Effectiveness of silicon carbide inserts and plates are compared in terms of their energy absorbing capacities. The numerical simulation is also carried for the target material with the same experimental conditions. The experimental results are compared with the numerical results for validation and a reasonably good agreement is found. Further, the validated numerical model is extended to understand the ballistic performance of the target material. It is observed that the introduction of silicon carbide as front layer improves both the structural and ballistic performance. Also, the damage in case of samples with silicon carbide inserts is localized as opposed to that of silicon carbide plate.
Highlights
The necessity of human protection against the increasing threat levels of impact has led to the development of vehicle, aircraft and body armors
The target specimens of various combinations of Glass fiber reinforced polymer (GFRP)/ polyurethane foam (PUF)/polyurethane sheet (PUS) are subjected to low velocity impact at incident energies of 80J, 160J and 240J
Under the same impact conditions, the impactor penetrated through PUF+GFRP specimen which absorbed 48.58J of energy but failed to penetrate through PUS+GFRP laminate which absorbed 64.34J of energy
Summary
The necessity of human protection against the increasing threat levels of impact has led to the development of vehicle, aircraft and body armors. Naik et al (2012) explained the damage sequence during impact phenomenon on ceramic-composite armor They developed an energy-based dynamic analytical model for ballistic impact and found that the residual velocity values are having good agreement with their experimental results. Krishnan et al (2010) performed numerical analysis of ceramic composite armour using LS-DYNA They used Johnson Holmquist model for ceramic and user defined material model was developed to characterize the ductile backing made of highly elastic ultra-high molecular weight polyethylene (UHMWPE). They have found good agreement between experimental and numerical data. Balaganesan and Chandra Khan (2016) conducted medium velocity impact on repaired glass/epoxy composite laminates and found that the experimental
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