Optimization Design And Numerical Simulation Of Multilayered Composite Armor Under Projectile Impact

Compared to the traditional bullet proof steel armor, the multilayered composite armor has excellent features such as less area density and higher impact energy absorbabing capability, and is widely used in the weapen industry and protective engineering. In order to defend the injure caused by occurrent exploding during the digging and demolishing of the chemical weapons left by Japan, the optimization design and simulation of impact response of the multilayered composite armor under impact of the exploding fragments of 150mm red bomb were carried out. Results can be summarized as:(1) The portective demands for the composite armor was established based on the analysis of execution of the exploding fragments of 150mm red bomb. Three portective structures were presented according to the characteristics of the multilayered composite armor and the demand of area density.(2)Main failure mechanisms of the multilayered composite armor were analyzed and investigated based on the energy dissipation model, the stress wave model and the damage mechanics model, respectively.(3)Numerical modeling was established by using LS-Dyna for simulating the impact process of the multilayered composite armor structures with different configurations. The numerical results show similar phenomena observed in tested samples under projectile impact.(4)Under the conditions of same area density, three kinds of the multilayered composite armor structures with layers of ceramic, steel and glass fabric reinforced epoxy matrix composite laminates were developed in this paper. Effects of thickness of the ceramic layer on the impact response of the target were investigated by the numerical modeling. The simulating results show that the multilayered composite armor structures with ceramic layer of 3mm, steel layer 4mm and glass fabric reinforced epoxy matrix composite laminates 2.7mm were of the best portective capabilities against the vertical impact of projectile with mass of 26.5g and velocity of 727m/s.