A composite armor plate against penetration of an armor piercing incendiary projectile and a method for manufacturing the same

Abstract

This invention discloses a composite armor plate resistant to armor-piercing incendiary projectiles and its preparation method, belonging to the field of armor protection structures. The composite armor plate includes a ballistic plate and a first winding layer disposed on the outer peripheral surface of the ballistic plate. The ballistic plate includes a cover plate layer, a ceramic layer, a first support layer, a second support layer, and a back plate layer, sequentially bonded together by an interface layer. The cover plate layer, ceramic layer, and first support layer form a composite ceramic layer, and the outer peripheral surface of the composite ceramic layer is provided with a second winding layer. This invention achieves a gradient design in terms of strength by adding a cover plate layer, a first support layer, and a second support layer in the thickness direction. Furthermore, the winding arrangement of the first and second winding layers ensures the stability of the armor plate structure, fully utilizes the protective efficiency of the ballistic ceramic layer under armor-piercing incendiary projectile penetration, improves the composite armor plate's resistance to armor-piercing incendiary projectile penetration and dent resistance, significantly reduces the risk of the composite armor plate being penetrated, and enhances the battlefield safety of the wearer.

Description

Technical Field

[0001] This invention relates to the field of armor protection structure technology, and in particular to a composite armor plate resistant to armor-piercing incendiary projectiles and its preparation method. Background Technology

[0002] High protective effectiveness and lightweight design are important development trends for heavy weapon protective gear in today's complex battlefield environment. For the penetration threat of armor-piercing incendiary rounds, composite armor plates made of ceramic panels and ultra-high molecular weight polyethylene backing plates are significantly lighter than traditional ballistic steel plates, while maintaining the same level of protection. The development of this material has driven the lightweighting of armor-piercing incendiary round protective materials.

[0003] Current composite bulletproof armor plates are typically made by bonding a ceramic faceplate to an ultra-high molecular weight polyethylene (UHMWPE) backplate using thermosetting resin adhesives. Due to significant differences in physical properties between ceramic and UHMWPE materials, the UHMWPE backplate exhibits weak lateral support. This results in poor synergy between the ceramic faceplate and the UHMWPE backplate under the impact of armor-piercing incendiary projectiles, leading to high shock wave propagation impedance and easy separation between the ceramic faceplate and the UHMWPE backplate. Furthermore, the backplate undergoes severe deformation under projectile impact, resulting in severe back bulging or penetration, causing devastating structural damage to the bulletproof armor plate and threatening the lives of those installing it.

[0004] Therefore, it is evident that the existing composite bulletproof armor plates still have inconveniences and defects in terms of structure and use, and urgently need further improvement. How to create a new composite armor plate resistant to armor-piercing incendiary projectiles and its manufacturing method, ensuring the structural stability of the armor plate material through the setting of fiber winding layers and the gradient design of multiple material thicknesses, while simultaneously possessing excellent penetration resistance and dent resistance, and maximizing the efficiency of ceramic protection, has become a pressing goal for the industry. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a composite armor plate that is resistant to penetration by armor-piercing incendiary projectiles. By setting up fiber winding layers and gradient design in the thickness direction of multiple materials, the structural stability of the armor plate material is guaranteed, giving it excellent penetration resistance and dent resistance, maximizing the ceramic protection efficiency, thereby overcoming the shortcomings of existing composite bulletproof armor plates.

[0006] To solve the above-mentioned technical problems, the present invention provides a composite armor plate that resists the penetration of armor-piercing incendiary projectiles, including a ballistic plate and a first winding layer disposed on the outer peripheral surface of the ballistic plate. The ballistic plate includes a cover plate layer, a ceramic layer, a first support layer, a second support layer and a back plate layer that are sequentially bonded together by an interface layer.

[0007] In a further improvement, the cover plate layer, the ceramic layer, and the first support layer form a composite ceramic layer, and a second winding layer is provided on the outer peripheral surface of the composite ceramic layer.

[0008] In a further improvement, both the first and second winding layers include three overlapping winding annular surfaces, which are arranged in the X, Y, and Z directions to form a three-dimensional closed winding space.

[0009] In a further improvement, both the first and second winding layers are made by winding high-strength fiber filaments impregnated with resin and then bonding them together using a vacuum bag bonding process or a hot autoclave bonding process. The high-strength fiber is one or more of aramid 1414 fiber, aramid III fiber, PI fiber, PIPD fiber, PBO fiber, and UHMWPE fiber, and the resin is epoxy resin or phenolic resin.

[0010] In a further improvement, both the cover plate layer and the first support layer are made of aluminum alloy or titanium alloy, and the ceramic layer is made of silicon carbide ceramic, boron carbide ceramic, or alumina ceramic.

[0011] Further improvements include a cover layer thickness of 0.2-0.5 mm, a ceramic layer thickness of 5-20 mm, a first support layer thickness of 0.5-1.0 mm, a second support layer made of high-modulus fiber-reinforced thermosetting resin matrix composite material, a backing layer made of ultra-high molecular weight polyethylene, an interface layer made of highly elastic thermoplastic resin-based film, and an interface layer with a glass transition temperature not exceeding 110°C.

[0012] In a further improvement, the high-modulus fiber of the second support layer is made of carbon fiber, aramid 1414 fiber, aramid III fiber, PI fiber, PIPD fiber, PBO fiber or UHMWPE fiber, the thermosetting resin matrix of the second support layer is made of epoxy resin or phenolic resin, the thickness of the second support layer is 2-4mm, and the thickness of the backing layer is 7-20mm.

[0013] As a further improvement of the present invention, the present invention also provides a method for preparing a composite armor plate, wherein the composite armor plate includes a bulletproof layer and a winding layer disposed on the outer peripheral surface of the bulletproof layer, the bulletproof layer can be any structure with bulletproof function, such as a first bulletproof layer, a bulletproof plate, etc. The method for preparing the winding layer is as follows:

[0014] S1. The upper and lower surfaces of the bulletproof layer are fixed by the clamping device of the rolling winding equipment. The end of the first high-strength fiber filament impregnated with resin matrix is ​​fixed on the left, right, front or rear surface of the bulletproof layer. The clamping device of the rolling winding equipment is rotated by the servo motor, which drives the bulletproof layer to rotate. By controlling the left and right uniform movement of the high-strength fiber filament, the high-strength fiber filament is wrapped around the left, front, right and rear surfaces of the bulletproof layer to form the first layer of winding ring surface.

[0015] S2. The left and right surfaces of the bulletproof layer are fixed by the clamping device of the rolling winding equipment. The end of the second high-strength fiber filament impregnated with resin matrix is ​​fixed on the upper, lower, front, or rear surface of the bulletproof layer. The clamping device of the rolling winding equipment is rotated by a servo motor, which drives the bulletproof layer to rotate. By controlling the left and right uniform movement of the high-strength fiber filament, the high-strength fiber filament is wrapped around the upper, front, lower, and rear surfaces of the bulletproof layer to form a second winding ring surface.

[0016] S3. Fix the front and rear surfaces of the bulletproof layer using the clamping device of the rolling winding equipment, fix the end of the third high-strength fiber filament impregnated with resin matrix to the upper, lower, left, or right surface of the bulletproof layer, control the clamping device of the rolling winding equipment to rotate using a servo motor, and drive the bulletproof layer to rotate. By controlling the left and right uniform movement of the high-strength fiber filament, the high-strength fiber filament is wrapped around the upper, right, lower, and left surfaces of the bulletproof layer to form a third layer of winding ring surface;

[0017] S4. The resin matrix in the first, second, and third winding ring surfaces is cured by vacuum bag composite process or autoclave composite process to achieve a fixed connection between the winding layer and the bulletproof layer.

[0018] Further improvements include a clamping device in the rolling winding equipment with a rotation speed of 20-40 rpm, a left-right movement speed of 1.5-2.5 mm / s for the high-strength fiber filament, and a basis weight of 50-100 g / m² for the first, second, or third winding ring. 2 Furthermore, the high-strength fiber filaments are subjected to a tension of 50-200N during the winding process;

[0019] The pressure in the vacuum bag composite process or the autoclave composite process is 0.1-4 MPa, the temperature is 120-125℃, and the time is 20-40 min.

[0020] As a further improvement of the present invention, the present invention also provides a method for preparing a composite armor plate, wherein the composite armor plate is the aforementioned composite armor plate resistant to armor-piercing incendiary projectiles, and the method for preparing the composite armor plate includes the following steps:

[0021] (1) Preparation of the first bulletproof layer: The cover plate layer, interface layer, ceramic layer, interface layer and first support layer are stacked in sequence, and the composite ceramic layer is formed by vacuum bag composite process or autoclave composite process. Then, the second winding layer is set on the outer peripheral surface of the composite ceramic layer by the above-mentioned composite armor plate preparation method to complete the preparation of the first bulletproof layer; wherein, the cover plate layer and the first support layer are both made of aluminum alloy plate or titanium alloy plate, the ceramic layer is made of silicon carbide ceramic plate, boron carbide ceramic plate or alumina ceramic plate, and the interface layer is made of high elastic thermoplastic resin-based film;

[0022] (2) Preparation of the second bulletproof layer

[0023] First, the second support layer is prepared by spreading high-modulus fibers in a parallel, straight arrangement to form a single UD structure using a spreading device. A resin matrix is ​​then impregnated to prepare a UD structure prepreg. The single UD structure prepreg is then cross-laid in 0° and 90° directions and pressed using a flatbed hot press to form the second support layer with an orthogonal UD structure. The high-modulus fibers are made of carbon fiber, aramid 1414 fiber, aramid III fiber, PI fiber, PIPD fiber, or PBO fiber, and the modulus of the high-modulus fibers is not less than 800 cN / dtex.

[0024] Then, the backsheet layer is prepared by spreading ultra-high molecular weight polyethylene fibers in a parallel and straight arrangement to form a single UD structure using a spreading device. The resin matrix is ​​impregnated to prepare a UD structure prepreg. The single UD structure prepreg is cross-laid in the 0° and 90° directions and pressed by a flatbed hot press to form an orthogonal UD structure ultra-high molecular weight polyethylene backsheet layer. The strength of the ultra-high molecular weight polyethylene fibers is not less than 34 cN / dtex.

[0025] Next, the second support layer, interface layer, and ultra-high molecular weight polyethylene backsheet layer are stacked in sequence, and then composited into the second bulletproof layer using a vacuum bag composite process or an autoclave composite process.

[0026] (3) Preparation of composite armor plates

[0027] The first bulletproof layer, the interface layer, and the second bulletproof layer are stacked sequentially and then laminated into a bulletproof plate using a vacuum bag lamination process or an autoclave lamination process. A winding layer, namely the first winding layer, is then applied to the outer surface of the bulletproof plate using the aforementioned composite armor plate preparation method, thus completing the preparation of the composite armor plate.

[0028] With this design, the present invention has at least the following advantages:

[0029] The composite armor plate of this invention achieves a gradient design in terms of strength by adding a cover plate layer, a first support layer, and a second support layer in the thickness direction. Furthermore, the fiber winding arrangement of the first and second winding layers can fully utilize the protective efficiency of the ballistic ceramic layer under the penetration of armor-piercing incendiary projectiles, ensuring the stability of the ballistic armor plate structure. At the same time, it improves the penetration resistance and dent resistance of the composite ballistic armor plate, effectively overcoming the defect of the contradictory penetration resistance and dent resistance of existing ballistic materials. That is, while ensuring that the wearer is protected from penetration injury, it also weakens non-penetrating blunt force injury, greatly reducing the risk of the composite armor plate being penetrated and improving the battlefield safety factor of the wearer. Attached Figure Description

[0030] The above is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Figure 1 This is a schematic diagram of the composite armor plate of the present invention that resists penetration by armor-piercing incendiary projectiles.

[0032] Figure 2 This is an exploded structural diagram of the composite armor plate of the present invention that resists penetration by armor-piercing incendiary projectiles.

[0033] Figure 3 This is a schematic diagram illustrating the principle of the composite armor plate preparation method for resisting armor-piercing incendiary projectiles according to the present invention. Detailed Implementation

[0034] See attached document Figure 1 and 2 As shown, the composite armor plate resisting armor-piercing incendiary projectiles in this embodiment includes a ballistic plate 11 and a first winding layer 1 disposed on the outer peripheral surface of the ballistic plate 11. The outer peripheral surface of the ballistic plate 11 refers to its upper surface, lower surface, front surface, rear surface, left surface, and right surface.

[0035] In this embodiment, the bulletproof plate 11 is formed by bonding a first bulletproof layer 12 and a second bulletproof layer 13 together with an interface layer 4. The interface layer 4 is made of a highly elastic thermoplastic resin-based film, and the glass transition temperature of the interface layer 4 does not exceed 110°C.

[0036] The first bulletproof layer 12 includes a composite ceramic layer 14 and a second winding layer 2 disposed on the outer peripheral surface of the composite ceramic layer 14. The outer peripheral surface of the composite ceramic layer 14 also refers to its upper surface, lower surface, front surface, rear surface, left surface, and right surface.

[0037] The composite ceramic layer 14 is formed by bonding a cover plate layer 3, a ceramic layer 5, and a first support layer 6 together through an interface layer 4. The cover plate layer 3 and the first support layer 6 are made of aluminum alloy or titanium alloy. The cover plate layer 3 has a thickness of 0.2-0.5 mm, and the first support layer 6 has a thickness of 0.5-1 mm. The ceramic layer 5 is made of silicon carbide ceramic, boron carbide ceramic, or alumina ceramic, and its thickness is 5-20 mm.

[0038] The second bulletproof layer 13 is formed by bonding the second support layer 7 and the ultra-high molecular weight polyethylene backing layer 8 together through an interface layer 4. The second support layer 7 is made of a high-modulus fiber-reinforced thermosetting resin matrix composite material, wherein the high-modulus fiber is made of carbon fiber, aramid 1414 fiber, aramid III fiber, PI fiber, PIPD fiber, PBO fiber, or UHMWPE fiber, and the modulus of the high-modulus fiber is not less than 800 cN / dtex. The thermosetting resin matrix is ​​made of epoxy resin or phenolic resin. The thickness of the second support layer 7 is 2-4 mm.

[0039] The backsheet layer 8 is made of ultra-high molecular weight polyethylene (UHMWPE), wherein the strength of the UHMWPE fiber is not less than 34 cN / dtex. The thickness of the backsheet layer is 7-20 mm.

[0040] Both the first winding layer 1 and the second winding layer 2 are made of high-strength fiber filaments impregnated with resin, wound together and laminated using a vacuum bag lamination process or a hot autoclave lamination process. The high-strength fiber filaments are one or more of aramid 1414 fiber, aramid III fiber, PI fiber, PIPD fiber, PBO fiber, and UHMWPE fiber, and the resin is epoxy resin or phenolic resin, or a mixture of both.

[0041] In this embodiment, both the first winding layer 1 and the second winding layer 2 include three overlapping winding rings. These three winding rings are arranged in the X, Y, and Z directions to form a three-dimensional closed winding space, achieving three-dimensional wrapping of the bulletproof plate 11 and the composite ceramic layer 14. This significantly improves the structural stability of the composite armor plate and enhances its resistance to armor-piercing incendiary projectiles and its dent resistance. Specifically, each of the three winding rings is formed by three high-strength fiber filaments impregnated with resin and orthogonally wound in three main spatial directions in a mutually perpendicular manner.

[0042] The method for preparing the composite armor plate resistant to armor-piercing incendiary projectiles in this embodiment includes the following steps:

[0043] (1) Preparation of the first bulletproof layer 12

[0044] The cover plate layer 3, interface layer 4, ceramic layer 5, and first support layer 6 are stacked sequentially and then laminated into the composite ceramic layer 14 using a vacuum bag lamination process or an autoclave lamination process. The pressure in this vacuum bag lamination process or autoclave lamination process is 0.1-4 MPa, the temperature is 115-125℃, and the time is 60-120 min. The composite ceramic layer 14 includes an upper surface, a lower surface, a front surface, a rear surface, a left surface, and a right surface.

[0045] The steps for winding the second winding layer 2 around the outer peripheral surface of the composite ceramic layer 14 are as follows: as shown in the attached figure. Figure 3 As shown, the upper and lower surfaces of the composite ceramic layer 14 are fixed by the clamping device of the rolling winding device 10. The end of the first high-strength fiber filament 30 impregnated with resin matrix 20 is fixed to the left, right, front, or rear surface of the composite ceramic layer 14. The clamping device of the rolling winding device 10 is controlled by a servo motor to rotate at a speed of 20-40 rpm, driving the composite ceramic layer 14 to rotate. By controlling the left and right uniform movement of the high-strength fiber filament 30, the high-strength fiber filament 30 is wrapped around the left, front, right, and rear surfaces of the composite ceramic layer 14, forming the first layer of winding ring. The left and right movement speed of the high-strength fiber filament 30 is 1.5-2.5 mm / s, and the tension borne by the high-strength fiber filament 30 during the winding process is 50-200 N. The basis weight of the first layer of winding ring is 50-100 g / m². 2 .

[0046] Next, the left and right surfaces of the composite ceramic layer 14 are fixed by the clamping device of the rolling winding device 10. The end of the second high-strength fiber filament 30 impregnated with resin matrix 20 is fixed to the upper, lower, front, or rear surface of the composite ceramic layer 14. The clamping device of the rolling winding device 10 is controlled by a servo motor to rotate at a speed of 20-40 rpm, driving the composite ceramic layer 14 to rotate. By controlling the left and right uniform movement of the high-strength fiber filament 30, the high-strength fiber filament 30 is wrapped around the upper, front, lower, and rear surfaces of the composite ceramic layer 14, forming a second winding ring. During this winding process, the left and right movement speed of the high-strength fiber filament 30, the tension borne by the high-strength fiber filament, and the basis weight of the final second winding ring are all the same as those of the first winding ring.

[0047] Next, the front and rear surfaces of the composite ceramic layer 14 are fixed by the clamping device of the rolling winding device 10. The end of the third high-strength fiber filament 30 impregnated with resin matrix 20 is fixed to the upper, lower, left, or right surface of the composite ceramic layer 14. The clamping device of the rolling winding device 10 is controlled by a servo motor to rotate at a speed of 20-40 rpm, driving the composite ceramic layer 14 to rotate. By controlling the left and right uniform movement of the high-strength fiber filament 30, the high-strength fiber filament 30 is wrapped around the upper, right, lower, and left surfaces of the composite ceramic layer 14, forming a third winding ring. During this winding process, the left and right movement speed of the high-strength fiber filament 30, the tension borne by the high-strength fiber filament, and the basis weight of the final third winding ring are all the same as those of the first winding ring.

[0048] Then, the resin matrix in the first, second, and third winding ring surfaces is cured using a vacuum bag lamination process or an autoclave lamination process, thereby achieving a fixed connection between the second winding layer 2 and the composite ceramic layer 14, thus obtaining the first bulletproof layer 12. The pressure of this vacuum bag lamination process or autoclave lamination process is 0.1-4 MPa, the temperature is 120-125℃, and the time is 20-40 min.

[0049] (2) Preparation of the second bulletproof layer 13

[0050] First, the second support layer 7 is prepared by spreading high-modulus fibers in a parallel, straight arrangement to form a single UD structure using a spreading device. A resin matrix is ​​then impregnated to prepare a UD structure prepreg. The single UD structure prepreg is then cross-laid in 0° and 90° directions and pressed using a flatbed hot press to form the orthogonal UD structure of the second support layer 7. The high-modulus fibers are made of carbon fiber, aramid 1414 fiber, aramid III fiber, PI fiber, PIPD fiber, or PBO fiber, and the modulus of the high-modulus fibers is not less than 800 cN / dtex. The pressing process conditions of the flatbed hot press are: pressure 8-10 MPa, temperature 120-125°C, and time 30-60 min.

[0051] Then, the backing layer 8 is prepared by spreading ultra-high molecular weight polyethylene fibers in a parallel, straight arrangement to form a single UD structure using a spreading device. A resin matrix is ​​impregnated to prepare a UD structure prepreg. The single UD structure prepreg is then cross-laid in 0° and 90° directions and pressed using a flatbed hot press to form an orthogonal UD structure ultra-high molecular weight polyethylene backing layer. The strength of the ultra-high molecular weight polyethylene fibers is not less than 34 cN / dtex. The pressing process conditions of the flatbed hot press are: pressure 8-10 MPa, temperature 120-125℃, and time 30-60 min.

[0052] Next, the second support layer 7, the interface layer 4, and the ultra-high molecular weight polyethylene backing layer 8 are stacked sequentially, and then laminated into the second bulletproof layer 13 using a vacuum bag lamination process or an autoclave lamination process. The pressure of this vacuum bag lamination process or autoclave lamination process is 0.1-4 MPa, the temperature is 115-125℃, and the time is 60-120 min.

[0053] (3) Preparation of composite armor plates

[0054] The first bulletproof layer 12, the interface layer 4, and the second bulletproof layer 13 are stacked sequentially and laminated into a bulletproof plate 11 using a vacuum bag lamination process or an autoclave lamination process. The vacuum bag lamination process or autoclave lamination process involves a pressure of 0.1-4 MPa, a temperature of 115-125°C, and a time of 60-120 minutes. The bulletproof plate 11 includes an upper surface, a lower surface, a front surface, a rear surface, a left surface, and a right surface.

[0055] The steps for winding the first winding layer 1 around the outer surface of the bulletproof plate 11 are as follows: The upper and lower surfaces of the bulletproof plate 11 are fixed using the clamping device of a rolling winding machine. The end of a first high-strength fiber filament impregnated with a resin matrix is ​​fixed to the left, right, front, or rear surface of the bulletproof plate 11. A servo motor controls the clamping device of the rolling winding machine to rotate at a speed of 20-40 rpm, driving the bulletproof plate 11 to rotate. By controlling the left and right uniform movement of the high-strength fiber filament, the high-strength fiber filament is wrapped around the left, front, right, and rear surfaces of the bulletproof plate 11, forming the first winding ring surface. The left and right movement speed of the high-strength fiber filament is 1.5-2.5 mm / s, and the tension borne by the high-strength fiber filament 30 during the winding process is 50-200 N. The basis weight of the first winding ring surface is 50-100 g / m². 2 .

[0056] Next, the left and right surfaces of the bulletproof plate 11 are fixed by the clamping device of the rolling winding equipment. The end of the second high-strength fiber filament impregnated with resin matrix is ​​fixed to the upper, lower, front, or rear surface of the bulletproof plate 11. The clamping device of the rolling winding equipment is controlled by a servo motor to rotate at a speed of 20-40 rpm, driving the bulletproof plate 11 to rotate. By controlling the left and right uniform movement of the high-strength fiber filament, the high-strength fiber filament is wrapped around the upper, front, lower, and rear surfaces of the bulletproof plate 11, forming a second layer of winding ring. During this winding process, the left and right moving speed of the high-strength fiber filament 30, the tension borne by the high-strength fiber filament, and the basis weight of the final second layer of winding ring are all the same as those of the first layer of winding ring.

[0057] Next, the front and rear surfaces of the bulletproof plate 11 are fixed by the clamping device of the rolling winding equipment. The end of the third high-strength fiber filament impregnated with resin matrix is ​​fixed to the upper, lower, left, or right surface of the bulletproof plate 11. The clamping device of the rolling winding equipment is controlled by a servo motor to rotate at a speed of 20-40 rpm, driving the bulletproof plate 11 to rotate. By controlling the left and right uniform movement of the high-strength fiber filament, the high-strength fiber filament is wrapped around the upper, right, lower, and left surfaces of the bulletproof plate, forming a third layer of winding ring. During this winding process, the left and right moving speed of the high-strength fiber filament 30, the tension borne by the high-strength fiber filament, and the basis weight of the final third layer of winding ring are all the same as those of the first layer of winding ring.

[0058] Then, the resin matrix in the first, second, and third winding ring surfaces is cured using a vacuum bag lamination process or an autoclave lamination process, thereby achieving a fixed connection between the first winding layer 1 and the bulletproof plate 11, thus producing the composite armor plate. The pressure of this vacuum bag lamination process or autoclave lamination process is 0.1-4 MPa, the temperature is 120-125℃, and the time is 20-40 min.

[0059] Results Examples

[0060] The composite armor plate of this application, prepared using the above method, was subjected to ballistic tests with an equivalent areal density of 42 ± 0.1 kg / m³. 2 As a comparison, existing armor plates with a weight of material per unit area were tested under the same ballistic test conditions. The evaluation indicators were the height of the bulge on the back of the composite armor plate (back bulge height) and the percentage of remaining thickness of the backing plate layer (margin). The structure of the existing armor plate is: fiber cloth crack arresting layer + interface layer + ceramic layer + interface layer + PE backing plate layer.

[0061] The ballistic test conditions for this embodiment were: Type 54 12.7mm machine gun round (armor-piercing incendiary round), incident angle 0°, bullet velocity upon impact with the target 488±10m / s, and firing distance 100m. The results are shown in Table 1 below.

[0062] Table 1 Comparison of ballistic test results between the composite armor plate and the existing armor plate in this embodiment.

[0063]

[0064] As shown in Table 1 above, the areal density of the existing armor plates remains essentially the same compared to the composite armor plate of this application. That is, under the same areal density and ballistic test conditions, the composite armor plate of this application exhibits a significant reduction in back convexity and a substantial increase in the thickness allowance of the backing layer during ballistic penetration, greatly reducing the risk of the backing layer being penetrated. This indicates that the composite armor plate of this application possesses excellent penetration resistance and dent resistance.

[0065] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, or alterations made by those skilled in the art using the disclosed technical content shall fall within the protection scope of the present invention.

Claims

1. A composite armor plate resistant to armor-piercing incendiary projectiles, characterized in that, It includes a bulletproof plate and a first winding layer disposed on the outer peripheral surface of the bulletproof plate. The bulletproof plate includes a cover plate layer, a ceramic layer, a first support layer, a second support layer and a back plate layer that are sequentially bonded together by an interface layer. The cover plate layer, ceramic layer and first support layer form a composite ceramic layer. The outer surface of the composite ceramic layer is provided with a second winding layer. The first winding layer and the second winding layer are both prepared by a three-dimensional closed winding space preparation method to form a three-layer stacked winding ring surface. The three winding ring surfaces are arranged in the X, Y and Z directions to form a three-dimensional closed winding space, so as to realize the three-dimensional three-dimensional winding and wrapping of the bulletproof plate and the composite ceramic layer, so that the composite armor plate has both anti-armor incendiary projectile penetration performance and anti-dent performance. The three layers of the winding annular surface refer to: three high-strength fiber filaments impregnated with resin and orthogonally wound in three directions of space in a mutually perpendicular manner without interweaving; Furthermore, both the first and second winding layers are made by winding high-strength fiber filaments impregnated with resin and then bonding them together using a vacuum bag bonding process or a hot autoclave bonding process. Both the cover plate layer and the first support layer are made of aluminum alloy plate or titanium alloy plate, the ceramic layer is made of silicon carbide ceramic plate, boron carbide ceramic plate or alumina ceramic plate, the thickness of the cover plate layer is 0.2-0.5mm, the thickness of the ceramic layer is 5-20mm, and the thickness of the first support layer is 0.5-1.0mm. The second support layer is made of high-modulus fiber-reinforced thermosetting resin matrix composite material, the backing layer is made of ultra-high molecular weight polyethylene backing layer, and the interface layer is a high-elasticity thermoplastic resin-based adhesive film; the thickness of the second support layer is 2-4 mm, and the thickness of the backing layer is 7-20 mm.

2. The composite armor plate resistant to armor-piercing incendiary projectiles according to claim 1, characterized in that, The high-strength fiber is one or more of aramid 1414 fiber, aramid III fiber, PI fiber, PIPD fiber, PBO fiber, and UHMWPE fiber, and the resin is epoxy resin or phenolic resin.

3. The composite armor plate resistant to armor-piercing incendiary projectiles according to claim 2, characterized in that, The glass transition temperature of the interface layer does not exceed 110°C.

4. The composite armor plate resistant to armor-piercing incendiary projectiles according to claim 3, characterized in that, The high-modulus fiber of the second support layer is made of carbon fiber, aramid 1414 fiber, aramid III fiber, PI fiber, PIPD fiber, PBO fiber or UHMWPE fiber, and the thermosetting resin matrix of the second support layer is made of epoxy resin or phenolic resin.

5. A method for preparing a composite armor plate, characterized in that, The composite armor plate is the composite armor plate against armor-piercing incendiary projectiles as described in claim 3, and the preparation method of the composite armor plate includes the following steps: (1) To prepare the first bulletproof layer, the cover plate layer, interface layer, ceramic layer, interface layer and first support layer are stacked in sequence and composited into the composite ceramic layer by vacuum bag composite process or autoclave composite process. Then, a winding layer, namely the second winding layer, is set on the outer surface of the composite ceramic layer by the preparation method of three-dimensional closed winding space, thus completing the preparation of the first bulletproof layer. (2) Preparation of the second bulletproof layer First, the second support layer is prepared by spreading high-modulus fibers in a parallel, straight arrangement to form a single UD structure using a spreading device. A resin matrix is ​​then impregnated to prepare a UD structure prepreg. The single UD structure prepreg is then cross-laid in 0° and 90° directions and pressed using a flatbed hot press to form the second support layer with an orthogonal UD structure. The high-modulus fibers are made of carbon fiber, aramid 1414 fiber, aramid III fiber, PI fiber, PIPD fiber, or PBO fiber, and the modulus of the high-modulus fibers is not less than 800 cN / dtex. Then, the backsheet layer is prepared by spreading ultra-high molecular weight polyethylene fibers in a parallel and straight arrangement to form a single UD structure using a spreading device. The resin matrix is ​​impregnated to prepare a UD structure prepreg. The single UD structure prepreg is cross-laid in the 0° and 90° directions and pressed by a flatbed hot press to form an orthogonal UD structure ultra-high molecular weight polyethylene backsheet layer. The strength of the ultra-high molecular weight polyethylene fibers is not less than 34 cN / dtex. Next, the second support layer, interface layer, and ultra-high molecular weight polyethylene backsheet layer are stacked in sequence, and then composited into the second bulletproof layer using a vacuum bag composite process or an autoclave composite process. (3) Preparation of composite armor plates The first bulletproof layer, the interface layer, and the second bulletproof layer are stacked sequentially, and then composited into a bulletproof plate using a vacuum bag composite process or a thermostatic tank composite process. A winding layer, namely the first winding layer, is then set on the outer surface of the bulletproof plate using a three-dimensional closed winding space preparation method, thus completing the preparation of the composite armor plate. The method for preparing the three-dimensional closed winding space is as follows: S1. The upper and lower surfaces of the bulletproof layer are fixed by the clamping device of the rolling winding equipment. The end of the first high-strength fiber filament impregnated with resin matrix is ​​fixed on the left, right, front or rear surface of the bulletproof layer. The clamping device of the rolling winding equipment is rotated by the servo motor, which drives the bulletproof layer to rotate. By controlling the left and right uniform movement of the high-strength fiber filament, the high-strength fiber filament is wrapped around the left, front, right and rear surfaces of the bulletproof layer to form the first layer of winding ring surface. S2. The left and right surfaces of the bulletproof layer are fixed by the clamping device of the rolling winding equipment. The end of the second high-strength fiber filament impregnated with resin matrix is ​​fixed on the upper, lower, front, or rear surface of the bulletproof layer. The clamping device of the rolling winding equipment is rotated by a servo motor, which drives the bulletproof layer to rotate. By controlling the left and right uniform movement of the high-strength fiber filament, the high-strength fiber filament is wrapped around the upper, front, lower, and rear surfaces of the bulletproof layer to form a second winding ring surface. S3. Fix the front and rear surfaces of the bulletproof layer using the clamping device of the rolling winding equipment, fix the end of the third high-strength fiber filament impregnated with resin matrix to the upper, lower, left, or right surface of the bulletproof layer, control the clamping device of the rolling winding equipment to rotate using a servo motor, and drive the bulletproof layer to rotate. By controlling the left and right uniform movement of the high-strength fiber filament, the high-strength fiber filament is wrapped around the upper, right, lower, and left surfaces of the bulletproof layer to form a third layer of winding ring surface; S4. The resin matrix in the first, second, and third winding ring surfaces is cured by vacuum bag composite process or autoclave composite process to achieve a fixed connection between the winding layer and the bulletproof layer; Furthermore, the clamping device of the rolling winding equipment rotates at a speed of 20-40 rpm, the left and right movement speed of the high-strength fiber filament is 1.5-2.5 mm / s, the tension borne by the high-strength fiber filament during winding is 50-200 N, and the basis weight of the first, second, or third winding ring is 50-100 g / m². 2 ; The pressure in the vacuum bag composite process or the autoclave composite process is 0.1-4 MPa, the temperature is 120-125℃, and the time is 20-40 min.

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