Abstract:
The improvement of body armor can significantly enhance the individual fighting ability, and bio-mimic can provide new idea for the design of high-performance body armor. The shell of armadillo is made of hexagonal scales closely joined together, with a layered structure, which has high flexibility and protective capacity. The geometric assembly mode of armadillo shell was adopted, and the hard layer and soft layer were simulated with the SiC ceramic and ultrahigh molecular weight polyethylene(UHMWPE) hot-compressed plate, respectively. The thickness ratio of two layers was chosen as 1∶1 for the design and fabrication of bionic composite scales. and the bionic scales were closely arranged together to form a new type flexible ballistic plate. In order to examine the actual ballistic performance and characterize the damage modes of the ballistic plate, ballistic testing was conducted to investigate the ballistic limit. Meanwhile, the finite element model was built to analyze the penetration resistance of the ballistic plate against 7.62 mm handgun bullets. The results indicate that the new ballistic plate not only meets the requirements in terms of ballistic performance, but also has good flexibility, which can provide a reference for the design and optimization of new types of ballistic plate in the future.