Research On Penetration Resistance Of Spliced Ceramic Composite Protection

With the wide application of ceramic and multilayer composite structures in individual soldier protective equipment,the penetration resistance of ceramic/metal laminated protection was studied in this paper,and the test and numerical simulation of bullet penetration ceramic/metal laminated protection were carried out to provide support and guidance for the optimization design of ceramic/metal laminated protection.The influence of ceramic/metal laminated structure and bond layer on the penetration resistance of laminated protection was studied.Based on Ls-Dyna finite element simulation software and FEM-SPH coupling algorithm,a simulation model of Type 53 7.62 mm armor piercing projectile penetrating ceramic/metal laminated protection was established,and its effectiveness was verified.The study on the protection of single-layer ceramic and double-layer ceramic laminated by bullet penetration with different binders was carried out.The influence of binder material,binder thickness and bond strength on the penetration resistance of single-layer ceramic and double-layer ceramic laminated structures was analyzed by numerical simulation.The results show that stress failure occurs in the region of impact and shear strain failure occurs in other regions.For single-layer ceramic protection,when the adhesive layer thickness is 0.1mm,the protection and penetration resistance performance is the best;for double-layer ceramic protection,when the adhesive layer thickness is 0.4mm,the penetration resistance effect is the best.The influence of laminated structure on the penetration resistance of laminated protection was studied through the combination of experiment and simulation.The results showed that the penetration resistance of single-layer ceramic structure was better than that of multi-layer ceramic structure under the condition of the same surface density,but the bullet-resistant ceramics were broken seriously.Two methods were used to improve the penetration resistance of single-layer ceramic structure.Adjust the thickness of the ceramic layer to enhance the abrasion of the projectile and ensure that the metal layer has enough thickness to support the ceramic layer to avoid premature breakage of the ceramic layer;The second method is to separate a layer of metal in front of the ceramic plate to act as a cover plate,which plays the role of upsetting the projectile in advance and inhibiting the reverse flow of ceramic fragments along the penetration direction.In the same way,two methods are used to improve the penetration resistance of the double-layer ceramic structure to ensure the same surface density.The first method is to add metal layer after each ceramic layer,so that each ceramic layer is strengthened by the backbrace effect.The second method is to match the thickness of the front and back layers of ceramic,the first layer of ceramic intercepts the projectile,the second layer of ceramic as intact as possible.The improvement of monolayer ceramic and multilayer ceramic lamination structure improves the penetration resistance.