Hole array composite armor filled with wound fiber columns and preparation method of hole array composite armor

Abstract

The invention discloses a hole array composite armor filled with wound fiber columns and a preparation method of the hole array composite armor. Circular blind holes, circular through holes, regular quadrangular blind holes, regular quadrangular through holes, conical through holes, stepped through holes, combined hole shapes and high-strength anti-elastic fiber columns filled in the corresponding hole shapes are designed. The invention further discloses a preparation method of the composite armor filled with the wound fiber columns and provided with the circular blind hole array, the conical through hole array and the stepped through hole array. Compared with a traditional hole array armor, the hole array armor plate has the advantages that the winding fiber column and the polyurea elastomer coating are added, the anti-elasticity performance of the center of the hole with poor anti-elasticity performance in the hole array armor plate can be enhanced, the overall anti-elasticity performance of the hole array armor plate is improved, the winding fiber column can be supported and restrained, and the anti-elasticity performance of the hole array armor plate is improved. The anti-bullet fiber column cannot lose efficacy due to insufficient friction force when being impacted by bullets, so that the anti-bullet fiber column is ensured to be better stressed in the length direction of the fiber; meanwhile, the polyurea elastomer can reduce the residual speed of the bullet.

Description

Technical Field

[0001] The present invention belongs to the field of bulletproof technology, and in particular relates to a hole array composite armor filled with wound fiber columns and a preparation method thereof. Background Art

[0002] Modern warfare is unprecedentedly fierce. Protective armor is a crucial element in the safety of military vehicles, crucial for their combat effectiveness and the safety of military equipment and personnel. Armor protection systems must balance ballistic performance with lightweight design. Hole array armor, a new type of armor constructed from a large number of holes arranged in a specific pattern based on traditional homogeneous armor, offers advantages such as light weight and high ballistic performance. However, its protective capabilities are significantly reduced when a bullet impacts the center of a hole.

[0003] Due to its lightweight and high-strength properties, bullet-resistant fibers are widely used in modern protective materials. Their density is much lower than that of traditional metal materials, allowing protective structures to provide excellent protection while significantly reducing weight, improving the wearer's mobility and comfort. Furthermore, bullet-resistant fibers have extremely high specific strength and can effectively absorb and disperse impact energy. Currently, the main application of bullet-resistant fibers is to make them into multi-layer fabric laminates for bullet protection. During impact, the fibers are primarily subjected to radial forces. By making bullet-resistant fibers into fiber columns, the force applied to the fibers during impact shifts to the direction of their length, maximizing the mechanical properties of the bullet-resistant fibers. Polyurea materials are widely used in explosion and ballistic protection due to their low cost, lightweight, and excellent wear, impact, and corrosion resistance. They are also easy to apply, quickly cure, and have strong adhesion to metal and non-metallic substrates, ensuring long-term durability and resistance to shedding, allowing them to form various composite structures. Research on the explosion and impact resistance of metal targets coated with polyurea has shown that the polyurea layer effectively reduces the residual velocity of the projectile and inhibits the expansion of the bullet hole in the metal target, demonstrating its ability to absorb large amounts of energy, inhibit large material deformation, and enhance its ballistic and explosion resistance. Summary of the Invention

[0004] The purpose of the present invention is to provide a hole array composite armor filled with wound fiber columns and a preparation method thereof. Fiber columns formed by winding high-strength bullet-resistant fibers are introduced into the hole array armor to ensure that the hole array composite armor is lightweight while enhancing the overall protective performance of the hole array armor. Polyurea elastomer is sprayed on the armor plate to reduce the residual velocity of the bullet and the damage to the armor plate, thereby solving the problem of poor protection capability of the center of the hole in the hole array armor.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A hole array composite armor filled with wound fiber columns comprises an armor plate with a plurality of holes formed on the armor plate, and the holes are filled with wound fiber columns made of anti-bullet fibers.

[0006] A further improvement of the present invention is that the armor plate is made of metal material, ceramic material or bullet-resistant composite material.

[0007] A further improvement of the present invention is that the metal material is steel, aluminum, titanium and alloys thereof, the ceramic material is boron carbide, silicon carbide, aluminum oxide and aluminum nitride, and the bullet-resistant composite material is a fiber-reinforced resin-based composite material.

[0008] A further improvement of the present invention is that a layer of polyurea elastomer is sprayed on the upper and lower surfaces of the armor plate.

[0009] A further improvement of the present invention is that the hole structure provided in the armor plate is a blind hole, a through hole, a tapered hole, a stepped hole or a combined hole structure formed by combining a plurality of single hole structures.

[0010] A further improvement of the present invention is that the shape of the hole is circular, elliptical, triangular, polygonal or irregular.

[0011] A further improvement of the present invention is that the holes provided in the armor plate are straight holes or inclined holes.

[0012] A further improvement of the present invention is that the anti-ballistic fiber is aramid fiber, ultra-high molecular polyethylene fiber, poly(p-phenylene benzobisoxazole) fiber, imide fiber, carbon fiber or basalt fiber.

[0013] A method for preparing a hole array composite armor filled with wound fiber columns, wherein the basic units of the fiber columns are formed by winding anti-bullet fiber filament bundles with yarns, and the wound fiber columns are formed by closely arranging the basic units and fixing them by winding with yarns.

[0014] A further improvement of the present invention is that the gaps between the holes in the armor plate and the fiber columns are bonded using an adhesive epoxy resin.

[0015] Compared with the prior art, the present invention has at least the following beneficial technical effects: Compared with traditional hole array armor, the present invention can provide better protection performance, as described below: The traditional bullet-resistance mechanism of hole-array armor is that when a bullet strikes the edge of a hole in the hole-array armor, the edge of the hole exerts asymmetric forces on the bullet, causing trajectory deflection, nose erosion, and core breakage, reducing the bullet's damage. However, when the bullet impacts at the center of the hole, it is more likely to pass directly through the hole.

[0016] Fiber columns made of bullet-resistant fibers are characterized by light weight and strong impact resistance. If a fiber column target plate made by arranging and winding the fiber columns is used alone as armor for protection, when a bullet hits the fiber column target plate, the friction between adjacent fiber columns is too small, and the fiber column in contact with the bullet is flushed out, reducing the protective ability of the fiber column.

[0017] Polyurea has good anti-explosion and impact resistance and is lightweight. It has strong adhesion to metal or non-metal spray substrates, ensuring long-term use without falling off. The sprayed polyurea elastomer can effectively reduce the residual velocity of the projectile and inhibit damage to the armor plate.

[0018] Fiber columns fill the holes in the hole array armor. When a bullet strikes the edge of the hole, it deflects, erodes the bullet's nose, and breaks the core. However, when the bullet impacts the center of the hole, the fiber columns interact with the bullet, increasing the energy required to penetrate the center and enhancing the overall protective capability of the hole array armor. The fiber columns are very lightweight and do not significantly increase the mass of the hole array armor, compromising its maneuverability.

[0019] Regarding fiber columns: When a bullet hits a fiber column, not only is there friction between adjacent fiber columns, but the hole array armor plate also provides support and constraints on the fiber columns, making it difficult for the fiber columns to rush out, while constraining the fiber columns to ensure that they are better stressed in the direction of the fiber length.

[0020] The polyurea elastomer coating itself has good anti-ballistic properties. The polyurea coating on the bullet-facing surface can effectively reduce the speed of the bullet, and the polyurea coating on the back-impact surface can provide support and restraint for the hole array composite armor filled with wound fiber columns, preventing the fiber columns from rushing out and reducing damage to the armor plate.

[0021] In summary, the hole array composite armor filled with wound fiber columns can not only give full play to the advantages of traditional hole array armor and fiber column protection structure, but also solve the problems of poor protection capability at the center of the hole of the hole array armor and weak constraint of the fiber column protection structure. At the same time, the polyurea coating enhances the overall protection capability of the composite armor. The combination of multiple protection structures achieves a complementary effect, and the overall performance exceeds the performance of each when used alone. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1and Figure 2 These are the three-dimensional and cross-sectional views of the composite armor with circular blind hole arrays filled with wound fiber columns.

[0024] Figure 3 and Figure 4 These are the three-dimensional and cross-sectional views of the composite armor with a circular through-hole array filled with wound fiber columns.

[0025] Figure 5 Schematic diagram of the preparation of circular hole array composite armor wrapped fiber column.

[0026] Figure 6 and Figure 7 They are the stereoscopic and cross-sectional views of the composite armor with a regular quadrilateral blind hole array filled with wound fiber columns.

[0027] Figure 8 and Figure 9 They are the three-dimensional and cross-sectional views of the composite armor with a regular quadrilateral through-hole array filled with wound fiber columns.

[0028] Figure 10 Schematic diagram of the preparation of regular quadrilateral hole array composite armor wrapped fiber column.

[0029] Figure 11 and Figure 12 These are the three-dimensional and cross-sectional views of the conical through-hole array composite armor filled with wound fiber columns.

[0030] Figure 13 Schematic diagram of the preparation of conical through-hole array composite armor wrapped fiber column.

[0031] Figure 14 and Figure 15 These are the three-dimensional and cross-sectional views of the composite armor with a stepped through-hole array filled with wound fiber columns.

[0032] Figure 16 Schematic diagram of the preparation of stepped through-hole array composite armor wrapped fiber columns.

[0033] Figure 17 and Figure 18 These are the three-dimensional and cross-sectional views of the composite armor with circular and conical combination hole arrays filled with wound fiber columns.

[0034] Figure 19 Schematic diagram of the preparation of composite armor wrapped fiber columns with circular and conical combined hole arrays.

[0035] Description of reference numerals: 1 is a circular blind hole armor plate; 2 is a circular blind hole fiber column; 3 is an adhesive; 4 is a polyurea coating on the bullet-facing surface; 5 is a polyurea coating on the bullet-receiving surface; 6 is a circular through-hole armor plate; 7 is a circular through-hole fiber column; 8 is a regular quadrilateral blind hole armor plate; 9 is a regular quadrilateral blind hole fiber column; 10 is a regular quadrilateral through-hole armor plate; 11 is a regular quadrilateral through-hole fiber column; 12 is a conical through-hole armor plate; 13 is a conical through-hole fiber column; 14 is a stepped through-hole armor plate; 15 is a stepped through-hole fiber column; 16 is an armor plate with a combination of circular and conical holes; 17 is a circular and conical combined hole fiber column. DETAILED DESCRIPTION

[0036] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0039] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] It should be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0042] It will also be understood that the term "and / or" used in the present description and appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0043] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0044] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0045] Example 1 The present invention provides a hole array composite armor filled with wound fiber columns. The hole array armor features a large number of holes evenly distributed across the high-strength armor plate. This not only reduces the weight of the armor but also prevents incoming projectiles from experiencing erosion effects such as deflection, cracking, and breaking, achieving excellent protection efficiency. However, the protection is poor when the bullet enters the center of the hole. High-strength anti-ballistic fibers are lightweight and high-strength, but when used alone as a protective structure, they lack support and restraint, preventing them from fully utilizing their protective properties. Polyurea has excellent explosion and impact resistance, and the sprayed polyurea elastomer has good adhesion to the substrate. The present invention proposes a hole array composite armor filled with high-strength anti-ballistic fiber columns, which improves the protective capability at the center of the hole in the hole array armor and addresses the drawbacks of using high-strength anti-ballistic fiber rods alone.

[0046] Example 2 The present invention provides a method for preparing a composite armor having a circular blind hole array filled with wound fiber columns, comprising: Step 1: Select a suitable armor plate and open a circular blind hole. The diameter of the circular hole should be slightly smaller than the diameter of the bullet. For example, to protect against the Type 53 7.62mm bullet, a 6mm circular hole can be used, and the hole spacing is 10mm. The thickness of the armor plate varies according to the material. When metal material is used, the thickness is 6mm, and when ceramic material is used, the thickness is 10mm. The depth of the blind hole is half of the plate thickness or a value based on the expected result.

[0047] Step 2: Prepare a wound fiber column and place it in the hole. In the first step, several anti-bullet fiber filaments are tightly arranged. The number of filaments can be selected according to the diameter of the circular hole. Another fiber filament is used to wind the arranged fiber filaments along the length direction to obtain a fiber column basic unit; one fiber column basic unit is taken as the center, and six basic units are tightly arranged around the center and wound with fiber filaments to obtain a filled fiber column; the wound fiber column is placed in the hole, and epoxy resin is filled in the gap.

[0048] Step 3: Spray polyurea elastomer and encapsulate. Grind and sandblast the upper and lower surfaces of the armor plate and spray adhesive. Use a spray gun to spray polyurea on the upper and lower surfaces of the armor plate, wait for the polyurea to gel, and complete the encapsulation after the polyurea and armor plate are tightly bonded.

[0049] Example 3 The present invention provides a method for preparing a composite armor having a conical through-hole array filled with wound fiber columns, comprising: Step 1: Select a suitable armor plate to open a conical through hole. The side with a larger diameter of the conical hole is the bullet-facing surface. The diameter of the conical hole on the bullet-facing surface should be slightly smaller than the diameter of the bullet. For example, to protect against the Type 53 7.62mm bullet, a 6mm round hole can be used, and the hole spacing is 10mm. The thickness of the armor plate varies according to the material. When metal material is used, the thickness is 6mm, and when ceramic material is used, the thickness is 10mm. The diameter of the conical hole on the back bullet surface is half of the diameter of the bullet-facing surface or a value based on the expected result.

[0050] Step 2: Prepare a wound fiber column and place it in the hole. In the first step, several bullet-resistant fiber filaments are tightly arranged. The number of filaments can be selected according to the diameter of the circular hole. Another fiber filament is used to wind the arranged fiber filaments along the length direction to obtain a basic unit of the fiber column; one fiber column basic unit is taken as the center, and six basic units are tightly arranged around the center and wound with fiber filaments. The end with a larger diameter facing the bullet is wound multiple times to form a conical fiber column; the wound fiber column is placed in the hole, and epoxy resin is filled in the gap.

[0051] Step 3: Spray polyurea elastomer and encapsulate. Grind and sandblast the upper and lower surfaces of the armor plate and spray adhesive. Use a spray gun to spray polyurea on the upper and lower surfaces of the armor plate, wait for the polyurea to gel, and complete the encapsulation after the polyurea and armor plate are tightly bonded.

[0052] Example 4 The present invention provides a method for preparing a composite armor having a stepped through-hole array filled with wound fiber columns, comprising: Step 1: Select a suitable armor plate to open a stepped through hole. The side with the larger diameter of the stepped hole is the bullet-facing surface. The diameter of the stepped hole on the bullet-facing surface should be slightly smaller than the diameter of the bullet. For example, to protect against the 7.62mm bullet of Type 53, a 6mm round hole can be used, and the hole spacing is 10mm. The thickness of the armor plate varies according to the material. When metal material is used, the thickness is 6mm, and when ceramic material is used, the thickness is 10mm. The depth of the step is half of the plate thickness or a value determined according to the expected result. The diameter of the stepped hole on the back bullet surface is half of the diameter of the bullet-facing surface or a value determined according to the expected result.

[0053] Step 2: Prepare a wound fiber column and place it in the hole. In the first step, several anti-bullet fiber filaments are tightly arranged. The number of filaments can be selected according to the diameter of the circular hole. Another fiber filament is used to wrap the arranged fiber filaments along the length direction to obtain a fiber column basic unit; a longer fiber column basic unit is used as the center, and six shorter basic units are tightly arranged around the center and wrapped with fiber filaments to obtain a filled fiber column; the wound fiber column is placed in the hole and epoxy resin is filled in the gap.

[0054] Step 3: Spray polyurea elastomer and encapsulate. Grind and sandblast the upper and lower surfaces of the armor plate and spray adhesive. Use a spray gun to spray polyurea on the upper and lower surfaces of the armor plate, wait for the polyurea to gel, and complete the encapsulation after the polyurea and armor plate are tightly bonded.

[0055] Example 5 refer to Figures 1 to 19The present invention provides a hole array composite armor filled with wound fiber columns, comprising a hole array armor plate, bullet-resistant fiber columns filled in the holes, and a sprayed polyurea coating. The hole patterns in the hole array armor plate can be circular blind holes 1, circular through holes 6, regular quadrilateral blind holes 8, regular quadrilateral through holes 10, conical through holes 12, stepped through holes 14, and circular and conical combination holes 16. The armor plate can be made of ceramic materials such as boron carbide, silicon carbide, alumina, and aluminum nitride; metal materials such as high-strength steel, aluminum alloy, and titanium alloy; or fiber-reinforced resin-based composite materials. The wound fiber columns are made by winding one or more bullet-resistant fibers. The shape of the fiber columns can be made into circular blind hole fiber columns 2, circular through hole fiber columns 7, regular quadrilateral blind hole fiber columns 9, regular quadrilateral through hole fiber columns 11, conical through hole fiber columns 13, stepped through hole fiber columns 15, and circular and conical combination hole fiber columns 17, depending on the hole pattern. The bullet-resistant fiber may be aramid fiber, ultra-high molecular weight polyethylene fiber, poly(p-phenylene benzobisoxazole) fiber, imide fiber, carbon fiber, basalt fiber, etc. The upper surface of the hole array armor plate is sprayed with a polyurea elastomer, including a polyurea coating 4 on the bullet-facing surface and a polyurea coating 5 on the bullet-receiving surface.

[0056] like Figure 1 and Figure 2 As shown, a circular blind hole armor plate is filled with a wound fiber column. This structure provides support and restraint for the wound fiber column through the unpenetrated part of the blind hole and the polyurea coating on the back bullet surface. When the bullet hits the center of the hole, the constraint of the hole allows the fiber rod to better bear the force in the direction of the fiber length. The circular hole can alleviate the stress concentration phenomenon during the impact process. At the same time, the polyurea coating can reduce the residual velocity of the bullet and the damage to the armor plate.

[0057] like Figure 3 and Figure 4 As shown, the circular through-hole armor plate is filled with wound fiber columns. This structure provides constraints through the epoxy resin between the armor plate and the wound fiber columns and the polyurea coating on the back surface. Compared with the circular blind-hole armor plate filled with wound fiber columns, the support and constraint effect of the wound fiber columns is weaker.

[0058] like Figure 5 As shown, the wound fiber column in the circular hole is firstly made by closely arranging a number of anti-bullet fiber filaments, and then winding the arranged fiber filaments along the length direction with another fiber filament to obtain the basic unit of the wound fiber column; with one basic unit as the center, six basic units are closely arranged around the center and wound with fiber filaments to obtain a wound fiber rod.

[0059] like Figure 6 and Figure 7As shown in the figure, the armor plate with a regular quadrilateral blind hole is filled with a wound fiber column. This structure provides support and restraint for the high-strength fiber column through the unpenetrated part of the blind hole and the polyurea coating on the back bullet surface. When the bullet hits the center of the hole, the constraint of the hole enables the fiber column to better bear the force in the direction of the fiber length. Compared with the circular blind hole structure, the regular quadrilateral hole is more likely to cause the bullet to deflect, but the stress concentration effect is more obvious, and the damage to the hole plate is more serious during the impact.

[0060] like Figure 8 and Figure 9 As shown, the armor plate with a regular quadrilateral through hole is filled with a wound fiber column. This structure provides constraints through the epoxy resin between the armor plate and the fiber column and the polyurea coating on the back bullet surface. Compared with the circular through hole, the regular quadrilateral is more likely to cause the bullet to deflect and break, and the damage to the hole plate is more serious.

[0061] like Figure 10 As shown, the fiber column in the regular quadrilateral hole is firstly made by closely arranging a number of anti-bullet fiber filaments, and then winding the arranged fiber filaments along the length direction with another fiber filament to obtain the basic unit of the wound fiber column; four basic units are closely arranged and wound with fiber filaments to obtain the wound fiber column.

[0062] like Figure 11 and Figure 12 As shown in the figure, the conical through-hole armor plate is filled with wound fiber columns. This structure provides support and restraint for the high-strength fiber columns through the part with smaller radius and the polyurea coating on the back bullet surface. Compared with the circular through-hole structure, the inclined conical surface of this hole structure can guide the projectile and its fragments, causing them to converge to the center of the cone hole and further collide with each other, thereby reducing the penetration speed of the projectile and its fragments.

[0063] like Figure 13 As shown, the fiber column in the conical through hole is firstly made by closely arranging a number of anti-bullet fiber filaments, and then winding the arranged fiber filaments along the length direction with another fiber filament to obtain the basic unit of the fiber column; the six basic units are closely arranged and wound with fiber filaments, and the end with the larger diameter facing the bullet is wound multiple times to form a conical fiber column and obtain a wound fiber rod.

[0064] like Figure 14 and Figure 15 As shown in the figure, the stepped through-hole armor plate is filled with wound fiber columns. This structure provides support and restraint for the high-strength fiber columns through the stepped hole structure and the polyurea coating on the back bullet surface. Compared with the circular through-hole structure, this hole type can not only provide the same number of edges as the circular through-hole armor on the bullet-facing surface, but also provide a large number of edges at each layer of steps, further causing collisions with the edges, increasing the asymmetric force on the projectile during penetration, thereby reducing the penetration speed of the projectile and its fragments. like Figure 16 As shown, the fiber column in the stepped through hole is firstly made by closely arranging a number of anti-bullet fiber filaments, and then winding the arranged fiber filaments along the length direction with another fiber filament to obtain the basic unit of the fiber column; with a longer basic unit as the center, six shorter basic units are closely arranged around the center, and are wound with fiber filaments to obtain a wound fiber column.

[0065] like Figure 17 and Figure 18 As shown, the armor plate with circular and conical combination holes is filled with wound fiber columns. This structure combines circular holes with conical holes, and provides support and restraint for the high-strength fiber columns through the steps at the interface and the inclined walls in the conical holes. This hole type has the characteristics of both circular holes and conical holes. It can not only increase more edges and improve the asymmetric force on the projectile during penetration, but also the inclined cone surface in the conical hole can further deflect the invading bullet, thereby reducing the penetration speed of the projectile and its fragments.

[0066] like Figure 19 As shown, the fiber column in the circular and conical combination hole can be composed of the fiber column in the circular hole and the fiber column in the conical through hole, which can be filled in the conical hole. Figure 11 and Figure 12 Fiber column in conical through hole, filling in the area of ​​​​the circular hole Figure 5 Fiber column in a circular hole.

[0067] The geometric parameters of the hole diameter and hole spacing in the hole array armor plate of the present invention, the number of anti-ballistic fiber filaments contained in the basic unit of the wound fiber column, and the arrangement of the basic units in the wound fiber column can be adjusted according to the expected results. At the same time, the hole shape in the hole array armor plate can also adopt shapes other than circular, elliptical, triangular, polygonal and irregular shapes, or a combined hole type composed of any single shape.

[0068] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0069] In addition, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for the purpose of illustrating the technical concept of the present invention and cannot be used to limit the scope of protection of the present invention. Any changes made based on the technical solution in accordance with the technical concept proposed by the present invention fall within the scope of protection of the claims of the present invention.

Claims

1. A composite armor with a hole array filled with wound fiber columns, characterized in that: The invention comprises an armor plate, wherein a plurality of holes are opened on the armor plate, and the holes are filled with wound fiber columns made of bullet-resistant fibers.

2. The hole array composite armor filled with wound fiber columns according to claim 1, characterized in that: Armor plates are made of metal, ceramic or bullet-resistant composite materials.

3. The hole array composite armor filled with wound fiber columns according to claim 2, characterized in that: The metal materials are steel, aluminum, titanium and their alloys, the ceramic materials are boron carbide, silicon carbide, aluminum oxide and aluminum nitride, and the bullet-resistant composite materials are fiber-reinforced resin-based composite materials.

4. The hole array composite armor filled with wound fiber columns according to claim 1, characterized in that: A layer of polyurea elastomer is sprayed on the upper and lower surfaces of the armor plate.

5. The hole array composite armor filled with wound fiber columns according to claim 1, characterized in that: The hole structure opened on the armor plate is a blind hole, a through hole, a tapered hole, a stepped hole or a combined hole structure composed of multiple single hole structures.

6. The hole array composite armor filled with wound fiber columns according to claim 5, characterized in that: The shapes of the holes are circular, elliptical, triangular, polygonal and irregular.

7. The hole array composite armor filled with wound fiber columns according to claim 1, characterized in that: The holes opened in the armor plate are straight holes or inclined holes.

8. The hole array composite armor filled with wound fiber columns according to claim 1, characterized in that: The anti-bullet fiber is aramid fiber, ultra-high molecular polyethylene fiber, poly(p-phenylene benzobisoxazole) fiber, imide fiber, carbon fiber or basalt fiber.

9. The method for preparing a hole array composite armor filled with wound fiber columns according to any one of claims 1 to 8, characterized in that: The basic unit of the fiber column is formed by winding a bundle of anti-elastic fiber filaments through yarn, and the wound fiber column is formed by closely arranging the basic units and winding and fixing them through yarn.

10. The method for preparing a hole array composite armor filled with wound fiber columns according to claim 9, characterized in that: The gaps between the holes in the armor plates and the fiber columns are bonded using epoxy resin as an adhesive.

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