Numerical study on ballistic impact behavior of hybrid composites

Abstract

Ideal design of hybrid composite defensive armour is drawing the attention of armour designers in military, aviation automobile industries. In this research work, the impact of hybridization on the composite armours under high speed impact is researched numerically utilizing LS DYNA code. The hybrid composite armour protection is set up utilizing different composites and stacking sequence of fiber reinforced composites, such as, Kevlar fiber reinforced polymer composites (KFRP), E-Glass fiber reinforced polymer composites (GFRP) and Carbon fiber reinforced polymer composites (CFRP). Unique blends of hybrid composite armours examined are KFRP cover with GFRP, KFRP cover with CFRP and GFRP cover with CFRP at different positions for a consistent armour thickness. The aftereffects of ballistic limit velocity got from the numerical examination are contrasted with experimental outcomes accessible in literature within 5% for non-hybrid KFRP, GFRP and CFRP laminates. Further, the impact of stacking sequence, projectile nose shape on ballistic resistance, energy absorption capability and residual velocity are introduced for various hybrid composite armours. The numerical outcomes reveal that, the hybridization and distinctive stacking sequence of hybrid composites shows critical response on the ballistic performance. The outcomes additionally show energy absorption capacity and ballistic limit velocity of the armour are delicate to projectile nose shape. In particular, it is discovered that organizing the KFRP layer at the outside side, GFRP layer in the middle of the KFRP layer offers great ballistic resistance when contrasted with that of other hybrid composites contemplated.