Ballistic behaviors of injection-molded honeycomb composite

The purpose of this study is to explore a new type of structure design and injecting material selection of the composite sandwich bulletproof system. A re-entrant hexagonal honeycomb with the negative Poisson’s ratio effect was designed. Thermoplastic polyurethanes (TPU), polypropylene (PP) and polycarbonate (PC) were chosen to inject into the re-entrant honeycomb structure by injection molding to form the composite sandwich layers. The total...