Fragmentation prevention for Kevlar fiber pipe reinforced honeycomb cabin

The ship protection tank is the key structure to defend the warship against fragment attack. The side cabin can prevent the high-speed fragment from hitting deeply, and has the functions of cooling, absorbing heat and extinguishing fire. The research shows that the fiber-filled foam lightweight structure has good cavity inhibition effect. In this paper, Kevlar pipe reinforced honeycomb cabin was designed, and the mechanism of Kevlar reinforced honeycomb tank against fragment attack was studied by armor piercing test and numerical simulation. The fragment penetration process and damage mode of Kevlar reinforced honeycomb structure under high-speed impact were systematically analyzed and model verified. Compared with the hollow aluminum foam structure, Kevlar reinforced honeycomb structure is found that can effectively enhance the ability of the side cabin structure to resist fragment impact. Moreover, the effects of core layer height, panel thickness, fragment velocity, incident angle and installation of sandwich structure on preventing fragment penetration were further systematically discussed. The conclusions will provide reference for the design of fiber-filled foam side cabin structure.