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Abstract

The resistance of glass-reinforced laminates with different thickness ratio (ratio of glass/epoxy plies thickness to aluminum sheets thickness) subjected to high-velocity impact is investigated experimentally and analytically. The tests are carried out by a light gas gun and a 14 g blunt cylindrical projectile. The ballistic limit velocity and specific perforation energy is used for comparing results. The failure mechanisms that absorbed projectile’s energy during perforation process are studied by examining the damaged samples. This examining helped us to derive an analytical expression to predict the ballistic limit and specific perforation energy. The good agreement between experimental and analytical results shows well mathematical modeling. The results indicate that global deformation of aluminum sheets had the most effect on absorbing energy. Increasing the number of composite plies may enhance the absorbed energy of a fiber metal laminate but also increases weight and cause to be away from the optimum condition. Besides these two procedures, a numerical analysis is done and the results compared with previous ones and are commented upon.

Keywords

Glass-reinforced high velocity impact specific perforation energy experimental analytical

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Investigation on the high velocity impact properties of glass-reinforced fiber metal laminates

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