B₄C Ceramics/UHMWPE Fiber Laminated Structural Composite Research On Bulletproof Mechanism And Attenuation Law Of Materials

With the continuous progress of science and technology,the development of weapons in modern warfare has become more and more advanced,and the structural design of the equipment required to face ballistic impact has become more and more important.Composite laminate structures have become the mainstream research direction,which can maximize the impact resistance and also ensure the light weight of laminate armor.Although the current composite structure design has been improved to various degrees,there is still a lack of effective structural design for lightweight and high-speed impact resistant laminated armor.In this paper,for B4 C ceramic and UHMWPE fibers,the effects of different structural B4 C ceramic/UHMWPE fiber laminated structural composites,different fiber woven resin matrix composites and different interfacial strength composites on the ballistic protection mechanism,velocity decay law and energy consumption weight of 7.62 mm armor piercing ammunition are investigated using the finite element simulation software ABAQUS.The main research contents and results are as follows:(1)Based on the understanding of modern warfare equipment requirements and the advantages of related materials,B4 C ceramics and UHMWPE fibers were selected as the research objects to investigate the effects of the bonding method of boron carbide ceramics,ceramic block shape and ceramic block size on the performance of B4 C ceramic/UHMWPE laminated structural composites against 7.62 mm armor-piercing ammunition.The simulation results show that the laminated armor bonded with square boron carbide 10 cm ceramic blocks under the same conditions has stronger ballistic protection.(2)After determining the effect of ceramic structure on the impact resistance of the composites,the impact resistance of the composites with different UHMWPE fiber weave structures against 7.62 mm armor-piercing projectiles was investigated using finite element analysis software,and the damage patterns of different woven fiber resin matrix composites were analyzed after the high-speed impact of the projectiles,and the impact resistance effect was analyzed according to the energy consumption percentage and the related mechanism was analyzed.The simulation results show that the composite with UHMWPE three-dimensional orthogonal fiber weave structure has the best impact resistance.(3)The effect of interfacial strength between fibers and resin of the commonly used unidirectional orthogonal lay-up method on the impact resistance effect of 7.62 mm armorpiercing ammunition was investigated.The simulation results show that there is a certain threshold range for the effect of interfacial strength on fiber-reinforced resin matrix composites.Within this threshold range,the composite has the best impact resistance.