Multi-layer composite structure bulletproof armor for helicopter cockpit

The multi-layer composite structure bulletproof armor for the helicopter cockpit comprises an outer protection layer and an inner core which is completely wrapped by the outer protection layer, and the inner core comprises a crack arrest layer, a bullet breaking layer, a transition layer, a reinforcing layer and a damage reducing layer which are sequentially arranged in a stacked mode. The bulletproof layer is made of a special ceramic material with the outer surface coated with a high-performance fiber material, all layers of materials of the inner core are tightly adhered through an adhesive, and the surface density of the bulletproof armor is not larger than 43 kg/m < 2 >. The bulletproof armor is prepared by adopting the structure that the outer protective layer completely wraps the inner core, the inner core is sealed and protected, the service life of the bulletproof armor is prolonged, the inner core is formed by sequentially stacking and bonding the crack arrest layer, the bullet breaking layer, the t