Multi-level composite protection structure and preparation method thereof

Abstract

The invention provides a multi-level composite protection structure and a preparation method thereof. The multi-level composite protection structure comprises a shell, a discrete high-toughness layer, a bulletproof layer, a partition plate, a damping layer and an energy absorption layer, wherein the shell is of an accommodating structure with an opening in one end, the discrete high-toughness layer, the partition plate and the bulletproof layer are sequentially arranged in the shell, the discrete high-toughness layer comprises a plurality of blocks in preset shapes, the damping layer is arranged on the surface of the bulletproof layer, and the energy absorption layer is arranged on the surface of the damping layer, and comprises a porous structure with open pores or closed pores. According to the invention, a highly hierarchical non-uniform composite structure can be formed, and efficient deflection of an impact projectile body is realized; due to the discrete high-toughness layer, expansion of cracks in the discrete high-toughness layer and the bulletproof layer is reduced, and local damage is only generated in a contact area when a projectile body is impacted; the block bodies in the discrete high-toughness layer are replaced, so that the structure can be reused; and the porous structure configuration of the energy absorption layer can be adjusted according to protection requirements, light and efficient energy absorption is achieved, and back counter-acting force and transmission energy are reduced.

Description

technical field [0001] The application relates to the field of impact protection, in particular to a multi-level composite protection structure and a preparation method thereof. Background technique [0002] There are many classification methods for protective materials. According to the types of raw materials, the existing protective materials mainly include metal plate protective materials, ceramic plate protective materials and combined protective materials. [0003] The metal plate protective material has high strength and good toughness. When encountering high-speed impact penetration, the metal plate protective material has high plastic deformation capacity and uniform deformation. However, the metal protective material is heavy, easy to rust, and the manufacturing and processing process is complicated It is difficult to make special-shaped structural parts, and it is difficult to strike a balance between reducing the load and enhancing the protective performance; the ...

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Problems solved by technology

[0003] The metal plate protective material has high strength and good toughness. When encountering high-speed impact penetration, the metal plate protective material has high plastic deformation capacity and uniform deformation. However, the metal protective material is heavy, easy to rust, and the manufacturing and processing process is complicated It is difficult to make special-shaped structural parts, and it is difficult to strike a balance between reducing the load and enhancing the protective performance; the ceramic plate protective material has extremely high hardness, elastic modulus and relatively low density relative to metal, and has good chemical stability. High temperature resistance, erosion resistance and wear resistance. However, due to the shortcomings of ceramic plates such as low fracture toughness, small thermal expansion coefficient at room temperature, high requirements for processing technology and poor resistance to multiple bullets, homogeneous ceramic materials cannot be used alone. For the manufacture of bulletproof armor, the common method is to combine ceramic materials with metal materials to improve its toughness and improve the bulletproof performance of the material

[0004] However, the single-shot bulletproof ability and multi-shot bulletproof ability of the existing combined protective materials are average, unable to cope with high-intensity projectile impact, and the production cost is high, maintenance is relatively difficult, and it is difficult to reuse

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