Back thorn type anti-explosion composite structure

Abstract

The utility model belongs to the field of protection technology design, and particularly relates to a back thorn type explosion-proof composite structure. The negative Poisson's ratio composite board sequentially comprises back thorns, a ceramic layer, a PE board and a negative Poisson's ratio structure from top to bottom. The back thorns are hollow pipes with closed upper ends and are uniformly distributed above the ceramic layer in a gluing and cutting manner, the ceramic layer is connected with the PE plate on the lower layer in a bonding manner, and the PE plate is connected with the negative Poisson's ratio structure on the bottom layer in a cutting sintering or bonding manner. According to the back thorn type composite anti-explosion protection equipment, the back thorn type hollow pipe structure is used, and the protection range of the protection equipment is effectively enlarged. The combination sequence is arranged according to the protection characteristics of the ceramic, the PE plate and the negative Poisson's ratio material, and respective effects are exerted to the maximum extent.

Description

Technical Field

[0001] This utility model belongs to the field of protective technology design, specifically relating to a back-stabbing explosion-proof composite structure. Background Technology

[0002] With the application of battlefield drones and various guided missiles, more stringent requirements have been placed on the protection of armor and base fortifications. Increasing the distance between missiles or drones and equipment upon explosion can effectively reduce the damage caused by the blast impact, thus providing good protection for vehicles, fortifications, equipment, and personnel. Simultaneously, based on different material properties and protective functions, the material structure is designed with combinations to minimize the damage to internal structures caused by fragment penetration and blast shock stress waves. Ceramic materials have high hardness and offer good protection against fragment or projectile penetration, rapidly dissipating the mass and kinetic energy of the projectile or fragment. PE sheets have good toughness and fracture strength, providing significant protection against low-velocity fragments and projectiles; while porous negative Poisson's ratio materials exhibit indentation resistance, deforming the surrounding material towards the compression area when compressed, improving penetration resistance and energy absorption. Furthermore, the porous structure effectively cuts off the stress wave transmission path, dispersing the stress wave over a larger area and reducing the damage to the internal structure caused by the peak value of the stress shock wave.

[0003] Currently used armor protection structures are mostly homogeneous or composite structures, lacking any significantly protruding structures on the surface. This makes them unable to increase the protection distance against various explosive threats, and their simple structure lacks the capability for multi-structure design. Furthermore, they cannot effectively delay or reduce the impact of peak shockwaves on internal structures in response to the destructive power of blast waves. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a back-stabbing explosion-proof composite structure.

[0005] Specifically, this is achieved through the following technical solutions:

[0006] A spiked explosion-proof composite structure includes, from top to bottom, spikes, a ceramic layer, a PE board, and a negative Poisson's ratio structure. The spikes are hollow tubes with closed upper ends, which are evenly distributed above the ceramic layer by adhesive bonding and insertion. The ceramic layer is connected to the PE board below by adhesive bonding. The PE board is connected to the negative Poisson's ratio structure at the bottom layer by insertion sintering or adhesive bonding.

[0007] Furthermore, the material used for the backstab is steel or titanium alloy.

[0008] Furthermore, the backstab height is adjusted in length and angle based on the application environment and installation position, and the spacing between backstabs is 10cm to 20cm.

[0009] Further, the negative Poisson's ratio structure material is steel or titanium alloy.

[0010] Further, the negative Poisson's ratio structure is a hollow structure, in particular, a three-layer structure.

[0011] The utility model discloses the beneficial effect

[0012] (1) the utility model provides a kind of back thorn formula composite anti-blast protective equipment, back thorn formula hollow pipe structure is used, effectively increases the protection range of protective equipment.

[0013] (2) the utility model provides a kind of back thorn formula composite anti-blast protective equipment, according to the protection characteristic arrangement combination order of ceramic, PE board and negative Poisson's ratio material, maximum degree plays respective role.

[0014] (3) the utility model provides a kind of back thorn formula composite anti-blast protective equipment, and the negative Poisson's ratio superstructure material of design can realize light weight and excellent shock absorption energy performance. DRAWINGS

[0015] Figure 1 It is the structure schematic diagram of the utility model.

[0016] Figure 2 with the utility model structure perspective view.

[0017] In the drawing: 1-back thorn;2-ceramic layer;3-PE board;4-negative Poisson's ratio structure; CONCRETE EMBODIMENT

[0018] The utility model is further explained in detail in connection with the drawings and specific embodiment.

[0019] Example 1

[0020] As Figure 1 Indicated, a kind of back thorn formula anti-blast composite protective equipment structure, including back thorn 1, the back thorn 1 is high-strength high-hardness metal or alloy such as steel, titanium alloy;

[0021] Back thorn 1 structure is the hollow pipe of upper end closed, can prevent rainwater dust into hollow interior. Back thorn is evenly distributed with ceramic layer surface.

[0022] The spacing, radius and wall thickness of back thorn 1 can be adjusted according to actual conditions, in principle, spacing is not easy to be larger, 10cm~20cm is better, improves the interception detonation rate to unmanned aerial vehicle and missile. Back thorn height needs to be adjusted according to use space, not easy to be too short, height is above 30cm, effectively expands protection range. Even when explosion threat occurs, make explosion center far from protective body, can reduce threat to overall impact.

[0023] The back thorn 1 structure is connected with the lower ceramic layer 2 by means of cutting and bonding. The process can be made in advance to make a certain depth of round hole ceramic, and the back thorn is inserted into the round hole and fixed by glue.

[0024] The ceramic layer 2 adopts high hardness and low density materials such as alumina, boron carbide or silicon carbide. It can be abraded by high-speed impact objects such as fragments, and the mass and kinetic energy of the threat objects are reduced to the maximum extent. Its thickness can be adjusted according to the protection level requirements.

[0025] The ceramic layer 2 adopts high strength and toughness PE plate 3, and high strength glue is used for bonding.

[0026] The high-strength PE plate 3 can further abrade the high-speed threat objects, and the toughness increases the energy consumption of the abrasion process, and the protection effect is also improved. At the same time, high toughness can also provide deformation allowance in the deformation process, and buffer the impact effect.

[0027] The negative Poisson's ratio structure layer 4 is bonded with the PE plate 3, and three layers of negative Poisson's ratio structure are adopted in this embodiment. The number of layers depends on the overall structure space and the explosion impact protection level, and multiple layers can be used to improve the protection level.

[0028] The negative Poisson's ratio structure layer 4 is a hollow structure inside, which can change the stress transmission path and dissipate the impact stress wave.

Claims

1. A back-stabbing explosion-proof composite structure, comprising, from top to bottom, a back-stabbing (1), a ceramic layer (2), a PE plate (3) and a negative Poisson's ratio structure (4); characterized in that, The back thorn (1) is a hollow tube with closed upper end, which is evenly distributed above the ceramic layer (2) by means of gluing and cutting, and the ceramic layer (2) is connected with the lower PE plate (3) by means of gluing, and the PE plate (3) is connected with the bottom negative Poisson's ratio structure (4) by means of cutting, sintering or gluing.

2. The back-studded blast-resistant composite structure of claim 1, wherein, The material of the back thorn (1) is steel or titanium alloy.

3. The back-studded blast-resistant composite structure of claim 2, wherein, The height of the back thorn (1) is above 30 cm, and the spacing between the back thorns (1) is 10-20 cm.

4. The back-studded blast-resistant composite structure of claim 1, wherein, The material of the negative Poisson's ratio structure (4) is steel or titanium alloy.

5. The back-studded blast-resistant composite structure of claim 4, wherein, The negative Poisson's ratio structure (4) is a hollow structure.

6. The back-studded blast-resistant composite structure of claim 5, wherein, The negative Poisson's ratio structure (4) is three layers.

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