Impact mechanics of multilayer composite armors: Analytical modeling, FEM numerical simulation, and ballistic experiments

An analytical model is developed to study the ballistic behavior of multilayer composite armors subjected high-velocity impact projectiles with arbitrary angle incidence, shape, size, and frictional characteristics. The thickness compaction resulting from production process also accounted for, quantifying role curing pressure on enhancement toughness laminates. Finite element method simulations are used in a complementary manner damage failure mechanisms within targets. Both approaches validated by extensive experimental tests layer stacking sequence investigated. It emerges that graded configurations yield higher when projectile penetrates plies decreasing fracture strength. These results can explain common structural arrangements biological as well be exploited design optimization shielding structures against projectiles.