Ballistic impact of fibre composite armours by fragment-simulating projectiles

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Abstract

Tests have been conducted in which 1.1 g fragment-simulating projectiles (FSPs) were fired at nylon 6,6/ ethylene vinyl acetate composite laminates. The laminates were manufactured at two pressing loads and two values of areal density (mass per unit area). V50 penetration velocities were measured and microscopic examination was conducted to gain an insight into the mechanics of penetration. This showed that the penetration is initiated by a combination of shear cutting and tensile failure that can be related to the shape of the FSP. The subsequent phase of penetration involves delamination of the composite and tensile failure of the fibres. There is a trend for laminates manufactured at a lower pressing load to absorb more impact energy.

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