Bulletproof, anti-penetration and anti-shock wave composite structure

Abstract

The invention belongs to the technical field of anti-impact material design, and particularly relates to a bulletproof, anti-penetration and anti-impact wave composite structure which comprises a five-layer structure, the first layer (1) is made of a bulletproof steel plate, the second layer (2) is made of PE fibers, the third layer (3) is made of foamed aluminum, the fourth layer (4) is made of metal wire mesh rubber, and the fifth layer (5) is made of a bulletproof steel plate from the front face to the back face. The composite structure has the characteristics of missile resistance, impact resistance and energy absorption, can reduce the damage of a missile to a target to a certain extent, greatly improves the safety and durability of equipment in a battlefield, and has a wide application prospect.

Description

Technical Field

[0001] The present application belongs to the technical field of anti-impact material design, and in particular relates to a composite structure with bulletproof, anti-penetration and anti-shock wave properties. Background Art

[0002] Armor protection is the basis for tanks, armored vehicles and helicopters to survive on the battlefield. In modern warfare, tanks and armored vehicles face all-round three-dimensional attacks from enemy anti-armor weapons such as tank guns, anti-tank missiles, shoulder-fired anti-tank weapons, and improvised explosive devices, which puts higher demands on the protection capabilities of tanks and armored vehicles. Traditional single-layer bulletproof steel plates increase their strength and hardness by increasing the thickness of the steel plates. However, as the thickness of the steel plates increases, their plastic toughness decreases significantly, making the steel plates brittle, resulting in a decrease in the steel plates' anti-penetration capabilities. At the same time, the structural weight increases significantly, reducing efficiency.

[0003] Therefore, the patent of the present invention proposes a multi-layer structure with higher strength, higher hardness, and better plastic energy absorption and penetration resistance than a single-layer steel plate, thereby achieving the goal of lightweight design of material structure and greatly increasing efficiency. It can be used in riot control vehicles, bulletproof money transporters, armored personnel carriers, tanks, submarines, landing craft, anti-smuggling boats, helicopters, etc. Summary of the invention

[0004] In order to solve the above problems, the present application provides a composite structure with bulletproof, penetration-resistant and shock wave-resistant properties, including:

[0005] The five-layer structure comprises a first layer (1) from the front to the back and is made of a bulletproof steel plate, a second layer (2) is made of PE fiber, a third layer (3) is made of foamed aluminum, a fourth layer (4) is made of metal mesh rubber, and a fifth layer (5) is made of a bulletproof steel plate.

[0006] Preferably, the metal mesh rubber comprises a lattice structure metal mesh rubber or a laminated metal mesh rubber.

[0007] Preferably, the bulletproof steel plate of the first layer (1) is connected to the PE fiber by gluing.

[0008] Preferably, the PE fiber and the foamed aluminum are connected by gluing.

[0009] Preferably, the foam aluminum and the wire mesh rubber are connected by welding.

[0010] Preferably, the wire mesh rubber is connected to the bulletproof steel plate of the fifth layer (5) by welding.

[0011] Preferably, the PE fiber material has a density of 0.97 g / cm2, an elastic modulus of 130 GPa, a Poisson's ratio of 0.2, a shear strength of 30 GPa, an axial compression strength of 350 GPa, an axial drawing strength of 420 GPa, a transverse compression strength of 150 GPa, and a transverse drawing strength of 30 GPa.

[0012] Preferably, the bulletproof steel plate is a high-strength bulletproof steel plate with a thickness of 3 to 8 mm and a hardness value of (480 to 540) HBW, and a tensile strength of ≥1250 MPa.

[0013] The advantages of the present application include: the composite structure has anti-bullet, anti-impact and energy-absorbing properties, can reduce the damage of missiles to targets to a certain extent, greatly improves the safety and durability of equipment on the battlefield, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a composite structure having bulletproof, penetration-resistant and shock wave-resistant properties in a preferred embodiment of the present application;

[0015] Figure 2 This is a bar graph of energy absorption of materials according to a preferred embodiment of the present application. DETAILED DESCRIPTION

[0016] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0017] like Figure 1 As shown, the present application provides a composite structure with bulletproof, penetration-resistant and shock wave-resistant properties, including:

[0018] The five-layer structure comprises a first layer (1) from the front to the back and is made of a bulletproof steel plate, a second layer (2) is made of PE fiber, a third layer (3) is made of foamed aluminum, a fourth layer (4) is made of metal mesh rubber, and a fifth layer (5) is made of a bulletproof steel plate.

[0019] Preferably, the wire mesh rubber comprises a lattice structure wire mesh rubber or a laminated wire mesh rubber. The wire mesh rubber is a new type of dry friction elastic damping material, which has the function of reducing vibration and absorbing energy. The relative sliding between the internal contacting wires generates dry friction, consumes energy, and plays a role in reducing vibration.

[0020] Preferably, the bulletproof steel plate of the first layer (1) is connected to the PE fiber by gluing.

[0021] Preferably, the PE fiber and the foam aluminum are connected by bonding. When the foam aluminum is used as a protective structure, the foam aluminum has an energy absorbing and wave clipping effect under the impact load. When the foam aluminum is subjected to a high-speed impact load, stress does not begin to appear on the stationary surface until the nominal strain reaches a certain value (non-zero), indicating that the elastic wave is transmitted to the stationary surface. Thereafter, in a shorter oscillation zone, mainly the propagation of stress waves in the foam metal in the initial stage of the impact and the round-trip reflection formed at the interface, and then enters a long stress platform until the nominal strain is greater than about 0.6. From the beginning to the nominal strain of about 0.6, the compression process causes the foam aluminum to absorb a large amount of energy, and has good energy absorption and impact resistance characteristics.

[0022] Preferably, the foam aluminum and the wire mesh rubber are connected by welding.

[0023] Preferably, the wire mesh rubber is connected to the bulletproof steel plate of the fifth layer (5) by welding.

[0024] Preferably, the PE fiber material has a density of 0.97 g / cm2, an elastic modulus of 130 GPa, a Poisson's ratio of 0.2, a shear strength of 30 GPa, an axial compression strength of 350 GPa, an axial drawing strength of 420 GPa, a transverse compression strength of 150 GPa, and a transverse drawing strength of 30 GPa.

[0025] Preferably, the thickness of the bulletproof steel plate is 3-8 mm, the hardness value is (480-540) HBW, and the tensile strength is ≥1250 MPa. The advantages of the present application include: the composite structure has the characteristics of anti-ballistic, anti-impact and energy-absorbing, which can reduce the damage of missiles to targets to a certain extent, greatly improve the safety and durability of equipment on the battlefield, and has a wide range of application prospects.

[0026] The deformation and failure mode of the composite structure under impact load is as follows: the front steel plate, which is also the first layer (1) of bulletproof steel plate, enters compression deformation first. During this process, the PE fiber deforms in coordination with the foam aluminum and metal rubber, and finally the PE fiber is pulled up and broken. The deformation mode of the core layer foam aluminum is also divided into compression zone and non-compression zone, but the compression mainly occurs in the central area where the projectile acts. Local large plastic deformation can be observed. When the impulse is large, the core layer completely enters densification. Some foam at the edge of the loading area is also compressed, but the compression amount is significantly reduced. The connection with the rear panel remains basically the same. In the area far from the loading area and in the constrained area, the foam core layer is almost not compressed. The wire mesh rubber plays a further role in buffering and absorbing energy. When the rear steel plate is close to the projectile, the core layer enters the deformation stage when the compression amount is already large, and finally breaks due to the punching and stretching of the projectile. The deformation range of the rear steel plate is significantly larger than that of the front steel plate.

[0027] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A composite structure with bulletproof, penetration-resistant and shock wave-resistant properties, characterized in that: include: The five-layer structure comprises a first layer (1) from the front to the back and is made of a bulletproof steel plate, a second layer (2) is made of PE fiber, a third layer (3) is made of foamed aluminum, a fourth layer (4) is made of metal mesh rubber, and a fifth layer (5) is made of a bulletproof steel plate.

2. The composite structure with bulletproof, penetration-resistant and shock wave-resistant properties as claimed in claim 1, characterized in that: The metal mesh rubber includes a lattice structure metal mesh rubber or a layered metal mesh rubber.

3. The composite structure with bulletproof, penetration-resistant and shock wave-resistant properties as claimed in claim 1, characterized in that: The bulletproof steel plate of the first layer (1) is connected to the PE fiber by bonding.

4. The composite structure with bulletproof, penetration-resistant and shock wave-resistant properties as claimed in claim 1, characterized in that: The PE fiber and the foam aluminum are connected by bonding.

5. The composite structure with bulletproof, penetration-resistant and shock wave-resistant properties as claimed in claim 1, characterized in that: The foam aluminum and the wire mesh rubber are connected by welding.

6. The composite structure with bulletproof, penetration-resistant and shock wave-resistant properties as claimed in claim 1, characterized in that: The metal wire mesh rubber is connected to the bulletproof steel plate of the fifth layer (5) by welding.

7. The composite structure with bulletproof, penetration-resistant and shock wave-resistant properties as claimed in claim 1, characterized in that: The PE fiber material has a density of 0.97 g / cm2, an elastic modulus of 130 GPa, a Poisson's ratio of 0.2, a shear strength of 30 GPa, an axial compression strength of 350 GPa, an axial drawing strength of 420 GPa, a transverse compression strength of 150 GPa, and a transverse drawing strength of 30 GPa.

8. The composite structure with bulletproof, penetration-resistant and shock wave-resistant properties as claimed in claim 1, characterized in that: The thickness of the bulletproof steel plate is 3 to 8 mm, the hardness value is (480 to 540) HBW, and the tensile strength is ≥1250Mpa.

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