Projectile impact behaviour on various Kevlar composites

Laminated panels play a vital role during the ballistic projectile impact which causes, a major structural deformation for the body of an aircraft. The important part of the hard laminated panel is to act as protective armour and the panel must be efficient enough to withstand adverse condition during its mission. The current examination has concentrated on the ballistic reaction of K29 and K129 woven Kevlar texture laminates. The experiments were carried out with laminated Kevlar composite plates directly impacted by two rigid projectiles of 7.5mm diameter steel cylindrical bullet and 9 mm hemispherical bullet. These plates were impacted at different velocities range from 150 to 250 m/s. LS-DYNA was used to model and simulate the projectile impact. FE simulation of the impact tests precisely anticipated the back face displacement (BFD) giving the maximum dynamic displacement and dynamic reaction for the conical projectile impacts, while the BFD for the hemispherical shots was low. Significantly, the numerical analysis precisely anticipated the residual velocity for the hemispherical impacts and time taken to at most extreme BFD for the cone shaped shots. Experimental testing and numerical simulation results were compared to analyze the behavior of composite laminates and the results shows good correlation.