JP7203472B2 - Prestressed restraint blocks and composite armor structures - Google Patents

Description

The present invention belongs to the art of armor, and in particular relates to prestressing restraint blocks and composite armor structures.

The anti-penetration performance of composite armor using ceramic materials depends primarily on the ceramic's compressive strength and hardness, crushing characteristics, debris flow friction and grain abrasion. The high compressive strength of ceramics enhances puncture resistance to some extent. Ceramic surface area crush area energy absorption is one of the key factors in ceramic penetration resistance, and for thick and rigidly constrained ceramic blocks, the flow friction action of ceramic fragments is the most important factor in penetration resistance. In the research, after laterally restraining the ceramic target, in the process of the bullet penetrating the restraining ceramic, the restraining ring will generate a restraining force against the ceramic target plate, thus the crack of the ceramic material. It is revealed that the expansion of can be effectively restrained, thereby enhancing the anti-penetration performance of ceramic materials. With the progress of research, more and more people started to pre-stress the ceramics and study the impact on the anti-penetration performance of ceramic materials.

By prestressing the ceramic material of the composite armor, the initiation and expansion of cracks inside the target can be effectively suppressed. Even if the fracture occurs inside the ceramic due to high-speed impact, the gap between each fracture block of the ceramic is still tightly extruded. exists. The reverse movement of the ceramic granules and the bullet will produce an abrasion effect on the bullet mass, and the mutual friction and other energy consumption mechanisms will work, which can effectively improve the penetration resistance of the ceramic.

At present, the methods of prestressing ceramics by domestic and foreign scholars mainly include the mechanical extrusion method and the hot charging method. Forming a pressing prestress in the direction, the hot charging method makes the constraining structure of ceramic material and metal material fixed to each other at high temperature, and then lowers the overall temperature, the coefficient of thermal expansion is relatively large, and the shrinkage is faster Compressing and pre-stressing the ceramic with metal, for example, a Chinese patent application with application number 201810777211.4 discloses a constrained ceramic-metal composite ballistic armor plate and a method of making the same.

Any method that employs hot and cold shrinkage or mechanical compression can generate prestress inside the ceramic. The prestress test for composite armor requires a stable prestress and the magnitude of the prestress is adjustable. Because it is difficult to achieve long-rod ballistic impact tests by adversely affecting and controlling the temperature to adjust the amount of prestress inside the ceramic, mechanical extrusion methods are often used in the tests. On the other hand, the mechanical pressure applying device is required to apply pressure uniformly laterally from the periphery of the ceramic material. However, although the facility structure is complicated, it is difficult to apply it in actual construction, and it is limited to research only.

The technical problem solved by the present invention is that it can realize rapid assembly under room temperature environment for the above problems existing in the mechanical extrusion method and hot charging method of prestressing the existing composite armor. It is to provide a prestressed restraint block and a composite armor structure.

The present invention is realized by the following technical proposals.

A pre-stress restraint block comprising a filling base 11 and a restraining ring 12, said filling base 11 having the same shape cross-section as the inner ring of the restraining ring 12 and fixedly fitted to the inner ring of the restraining ring 12. The outer wall of the filling platform 11 and the inner ring wall of the restraint ring 12 are wedged by conical fitting,
The outer wall of the filling platform 11 and the inner ring wall of the restraining ring 12 are respectively matching conical surfaces or matching polygonal pyramidal surfaces.

In the prestress restraint block in the above technical solution, the diameters of the large end and the small end of the outer wall of the filling platform 11 are d1 and d2, _respectively , and the diameters of the large end and the small end of the inner ring wall of the restraining ring ₁₂ are d1 and d2, respectively. The diameters of the ends are R ₁ and R ₂ respectively, satisfying R ₂ <d ₂ <R ₁ ≦d ₁ , and the heights of the filling platform 11 and the restraining ring 12 are h ₁ and h ₂ respectively. , where h ₁ ≤ h ₂ .

In the prestress restraint block in the above technical solution, the range of the cone inclination angle α of the outer wall of the filling base body 11 is 1° to 10°, preferably 3° to 6°, and the restraint ring 12 inner ring The wall cone inclination angle β ranges from 1° to 10°, preferably from 3° to 6°. There is an angle difference Δα, Δα=α−β, and the value range of Δα is 0° to 0.5°, preferably 0° to 0.2°.

In the prestress restraint block in the above technical solution, the diameter-thickness ratio d ₁ /h ₁ of the filling base 11 is 0.5-40, preferably 3-12.

In the prestress restraint block in the above technical solution, the filling truncated body 11 is a truncated body having an outer wall of a conical surface or a polygonal pyramidal surface,
Alternatively, it may be a cylindrical or prismatic body with a first variable diameter ring 14 fixedly fitted on the outside, and the outer wall of the first variable diameter ring 14 may be a conical surface or a polygonal pyramidal surface.

In the prestress restraint block in the above technical solution, the restraint ring 12 is a variable diameter ring body having an inner ring wall of a conical surface or a polygonal pyramidal surface,
Or it is a cylindrical ring or a prismatic ring in which the second variable diameter ring 13 is fixedly fitted, and the inner ring wall of the second variable diameter ring 13 is a conical surface or a polygonal pyramidal surface.

In the prestress constraining block in the above technical scheme, the filling base 11 is a split-layer structure including at least two layers of fixed-stacked filling blocks.

In the prestress restraint block in the above technical solution, the outer surface of the filling base 11 is covered with a coating layer 17 .

In the prestress restraint block in the above technical solution, a bottom plate structure is provided at the small end of the inner ring wall of the restraint ring 12 or the second variable diameter ring 13, and the bottom plate structure is integrated with the restraint ring 12. or a pad layer 15 laid under the small end of the filler platform 11 .

In the prestress constraining block in the above technical scheme, the filling platform 11 is ceramic, concrete or glass material, and the constraining ring 12 is metal or fiber reinforced composite material.

In the prestress constraining block of the present invention, a locking groove 18 is formed in the inner wall of the constraining ring 12, and the filling base body 11 after wedging is placed in the locking groove 18 in the constraining ring. A locking ring 19 is mounted in 12 for axial position limitation.

A composite armor structure according to the invention comprises at least one armor plate, said armor plate comprising several prestressed restraint blocks of the invention as described above, said prestressed restraint blocks being restrained from several split bodies. It is bonded with rings 12 or employs a constraining ring 12 of integrated honeycomb structure.

The composite armor structure in the above technical solution further includes a lid plate 2 and a back plate 3 respectively attached to cover the two surfaces of the composite armor.

The beneficial effects of the present invention are as follows.

In the present invention, a prestressing restraint block is obtained by press-fitting a filling base body made of ceramic, concrete, glass, or other material into a restraining ring inner ring made of metal or fiber-reinforced composite material, where the restraining ring and the filling base body are bonded together. The space is fitted and wedged by a conical surface, and according to the principle of ferrule restraint, the conical surface wedges between the inner ring of the restraining ring and the filling base body, and has a self-tightening function, and the filling base body is wedged by the inner ring of the restraining ring. , the radial ferrule force generated on the conical slant surface of the restraining force becomes greater as the vertical pressure increases, thus the strength of the filling platform increases, and the elastic recovery force of the restraining ring increases with the filling platform Adds lateral prestress to the body to increase the penetration resistance and blast impact resistance of the restraining block.

The prestress constraining block of the present invention can very conveniently apply a radial prestress to brittle materials such as ceramics, concrete or glass under room temperature conditions, the prestress being applied to the constraining ring of the packed platform. It can be controlled by the depth of wedge recess into the inner ring or the magnitude of the wedged cone inclination angle between the filler platform and the restraint ring, and can be used to prestress filler platform members of various sizes. Are suitable.

The prestress constraining block of the present invention does not need to change the relative dimensions of members by heating unlike the hot charging method. It is possible to apply the present invention in the case of a packed bed.

A single prestressed restraint block can be assembled into a larger area composite armor structure and assembled into a single layer armor plate, or a single layer armor plate can be displaced and combined into a multiple layer armor plate. It can reduce the weak part and further increase the protective effect. Restraint rings can be fabricated into the overall structure to improve the integrity of the restraint rings and the anti-bending ability of the armor plate.

In the process of inserting the packed bed into the restraint ring, the outer diameter of the small end of the packed bed has a larger tolerance than the diameter of the large end of the inner ring of the restraint ring. , easier to assemble than the hot charging method, larger dimensional tolerance range of the base and restraint ring members, more environmentally friendly, easier to replace damaged or destroyed parts, armed helicopters, armored vehicles , ships, tanks, aircraft caverns and missile well cover. In addition to being applied to protective materials such as armor, the prestressing method of the present invention can also be applied to brittle material members such as ceramic reflective mirrors, lenses, and transparent windows for aviation and space equipment. Prestressing can improve the flexural strength of these members and reduce the weight of the structure.

The present application will now be described in more detail in conjunction with the accompanying drawings and specific embodiments.

1 is an assembly schematic diagram of a circular cross-section prestress restraint block of Example 1. FIG. FIG. 2 is an assembly schematic diagram of the regular hexagonal section prestress constraint block of Example 1; 4 is an exploded cross-sectional view of the filling platform and the restraint ring in Example 1. FIG. FIG. 4 is a schematic diagram of applying prestress during the process of assembling the filling platform and the restraining ring in Example 1; ~ FIG. 5 is a schematic view of applying prestress during the assembly process of three types of filling bases and a restraining ring in Example 2, respectively; FIG. 10 is a schematic view of prestressing in the process of assembling the filling platform and the restraint ring in Example 3; ~ FIG. 11 is a schematic diagram of prestressing during two types of assembly processes of the filling platform and the restraining ring in Example 4; FIG. 11 is a schematic diagram of prestressing in the process of assembling the filling platform and the restraining ring in Example 5; FIG. 10 is a schematic diagram of prestressing in the process of assembling the filling platform and the restraint ring in Example 6; FIG. 11 is a schematic diagram of applying prestress during the assembly process of the filling platform and the restraint ring in Example 7; ~ FIG. 11 is a composite armor assembly schematic diagram of Example 8; ~ FIG. 10 is a schematic cross-sectional view of three types of lid plates of the composite armor of Example 9; ~ FIG. 11 is a schematic cross-sectional view of three types of back plates of the composite armor of Example 9; ~ FIG. 11 is a schematic cross-sectional view of five composite armors of Example 9; FIG. 4 is a cross-sectional dimension view of the circular table and the restraint ring axial line established in Example 1; 1 is a 1/4 finite element model diagram of established dimensions in Example 1. FIG. The prestress constraint block in Example 1 is the prestress-depression depth relationship curve in the prestress simulation process. The prestress constraint block in Example 1 is a loading platform damage cloud image in the penetration simulation process. The prestress constraint block in Example 1 shows the penetration depth-prestress relationship curve of the filling platform in the process of simulating penetration.

<Example 1>
1-4, the prestress constraining block 1 in the figures includes a filling base 11 and a restraining ring 12, the filling base 11 having a circular cross section in FIG. 1 and a regular hexagonal cross section in FIG. The constraining ring 12 has a cross section of the same shape as the inner ring, and is fixedly fitted in the inner ring of the constraining ring 12. They are mutually wedged by fitting, and using the principle of ferrule restraint, the elastic recovery force of the restraining ring 12 reacts to the filling base 11 in the process of pressing the filling base 11 into the inner ring of the restraining ring 12 . , a pressing prestress is applied to the filling base body 11 from the outer wall side of the filling base body 11 .

The filling base 11 and the restraining ring 12 in this embodiment are both integral structures, and are wedged between them by conical surfaces, and the cross section of the filling base 11 in FIG. 1 is circular. , the outer wall of which is a stepped conical surface truncated structure, and the inner ring wall of the restraint ring 12 is also a stepped conical surface. The cross section of the filling base body 11 in FIG. 2 is a regular hexagon, the outer wall thereof is a single-step hexagonal pyramidal surface variable diameter ring body, and the inner ring wall of the restraint ring 12 is also a single-step hexagonal pyramidal surface, The polygonal cross-section of the restraining ring 12 facilitates bonding to a continuous layer of armor, and practical applications may employ other polygonal pyramidal surfaces including, but not limited to, triangular, quadrangular, and pentagonal.

Specifically, referring to FIG. 3, in order to ensure that the filling platform 11 can be press-fitted inside the restraining ring 12 to generate a pressing prestress, the dimension between the filling platform 11 and the restraining ring 12 is: The following conditions should be satisfied.

Regarding the cross-sectional dimensions of the filling base 11 and the restraint ring 12, the outer wall of the filling base 11 is conical, that is, both ends of the filling base 11 in the axial direction are set to the large end and the small end, respectively. , the diameter of the large end of the packing block ₁₁ is d1, the diameter of the small end of the packing block ₁₁ is d2, and d1>d2, where the diameter refers to the packing block ₁₁ in _FIG . The diameter of the outer circle of the cross section and the diameter of the regular hexagonal circumscribed circle of the cross section of the filling base body 11 in FIG. Similarly, the inner ring wall of the restraint ring 12 is a conical surface, and a large end and a small end are set at both axial ends of the inner ring wall of the restraint ring 12. Among them, the diameter of the large end of the restraint ring 12 is R ₁ and the small end diameter of the restraint ring 12 is R ₂ , R ₁ >R ₂ . It is the diameter of the regular hexagonal circumscribed circle of the inner ring wall cross section, preferably R ₂ <d ₂ <R ₁ ≦d ₁ .

Regarding the cone inclination angle dimension for wedging the filling base 11 and the restraint ring 12, the range of the cone inclination angle α of the outer wall of the filling base 11 is 1° to 10°, preferably 3° to 6°. , and the range of the cone inclination angle β of the inner ring wall of the restraint ring 12 is 1° to 10°, preferably 3° to 6°. It is the vertical included angle between the conical generatrix of the outer wall of the body 11 and the inner ring wall of the restraint ring 12 and the vertical direction, or the vertical included angle of the pyramidal ridgeline between the outer wall of the filling base body 11 and the inner ring wall of the restraint ring 12 in FIG.

Regarding the axial dimensions of the filling base 11 and the restraining ring 12, the axial heights of the filling base 11 and the restraining ring _{12 are} h1 and h2, _respectively , where _h1≤h2 . .

Specifically, the method of assembling the prestress restraint block and the basic principle of prestress are as follows.

The assembly schematics of the circular prestress constraining block and the hexagonal prestress constraining block are shown in FIGS. 12 after the inner ring large end opening of the restraining ring 12 is generally facing upwards and the small end of the filling platform 11 is pressed downwards into the inner ring of the restraining ring 12 for ease of biasing. , pressing thrust is applied to the filling base body 11 along the altitude direction, and the elastic recovery force of the restraint ring 12 presses the filling base body 11 inward to temporarily tighten it, and applies a prestress force in the radial direction. , the greater the depth of depression of the filling base 11 in the inner ring of the restraining ring 12, the greater the radial prestressing force that the restraining ring 12 applies to the filling base 11. Get the stress constraint block. The method of press-fitting the filling platform 11 may adopt a method such as a jack, a hydraulic machine, or a bolt tightening method. The lubricant may be removed after press-fitting to . The magnitude of the radial prestress of the filling platform 11 can be determined by designing and adjusting the included angle between the frustum outer wall conical generatrix or the pyramid ridge line and the height, and the depression depth of the filling platform, if the included angle is constant, The greater the depression depth of the filling platform 11, the greater the prestress before the restraint ring 12 does not yield or break. The platform and restraining ring may be glued together to prevent slippage, or they may be in direct contact and stabilized by the frictional forces of both.

The filling platform 11 may adopt ceramic, concrete or glass material, the restraining ring 12 is metal or fiber reinforced composite material, fiber reinforced composite material is fiber reinforced metal matrix composite material or fiber reinforced polymer. include.

In the case of a prestress constraining block of the filling base body 11 that adopts a concrete material, the filling base body 11 can be cast-molded using the restraining ring 12 as a frame plate as it is. Apply isolation oil or arrange isolation film, reserve the press-in space after concrete molding at the bottom of the restraint ring 12, support or fix the bottom of the restraint ring until the concrete reaches strength, and fill the platform. 11 is further pressed into the restraining ring 12 to create a radial prestress in the filling platform 11 .

Referring to FIG. 4, in the process of assembling the filling platform 11 and the restraining ring 12, the bottom small end diameter d 2 of the filling platform 11 < d ₂ < to facilitate loading the platform into the restraining ring. The large end opening diameter at the top of the inner ring of the restraining ring 12 is defined as _R1 . The diameter-to-thickness ratio or the diameter-to-height ratio d ₁ /h ₁ of the packed base body 11 is 0.5-40, preferably 3-12. The ring wall of constraining ring 12 may be of variable thickness or of equal thickness, ie top wall thickness t1 of constraining ring 12≦bottom wall thickness t2. The wall thickness and yield strength of the restraint ring 12 are determined based on the required prestress applied to the filler bed 11, and the greater the ratio t/d between the wall thickness of the restraint ring 12 and the diameter of the filler bed 11, the greater the And the greater the yield strength of the restraint ring 12, the greater the potential restraint prestress that can be provided. Influenced by the discrepancies in the top and bottom cross-sectional diameters of the filling base 11 and the mismatch factors in the height direction wall thickness of the restraint ring 12, the prestress of the filling base 11 becomes non-uniform in the height direction, and the outer side of the filling base 11 By designing and adjusting the minute difference between the included wall cone angle α and the inner ring wall cone included angle β of the restraining ring 12, the change in magnitude of the upper and lower prestress can be adjusted. In the process of pressing the filling platform 11 into the restraint ring 12, the prestress of the prestress restraint block gradually increases from top to bottom, and by appropriately increasing the angle difference Δα between α and β, The difference between the upper and lower prestresses of the platform can be reduced, and the range of Δα is 0° to 0.5°, preferably 0° to 0.2°. When α=β, the filling base 11 is inserted into the restraining ring 12, and the contact surface between the outer wall of the filling base 11 and the inner ring wall of the restraining ring 12 is adhered. When the filling base 11 is inserted into the restraining ring 12, the contact stress between the outer wall of the filling base 11 and the inner ring wall of the restraining ring 12 becomes very small. The height difference between the top surface of the platform is h3, and the height difference between the bottom surface of the platform and the bottom surface of the restraint ring is h4.

Specifically, the filling platform 11 in FIG. 1 is a circular truncated body, and the inner ring wall of the restraint ring 12 is a circular truncated cavity. The material of the filling platform 11 is one of ceramic, concrete or glass, and the material of the restraining ring 12 is steel, aluminum alloy, titanium alloy or fiber reinforced polymer material. The method of assembly is to put the restraining ring 12 on the platform, apply epoxy resin, glass rubber to the inner wall of the restraining ring 12 and the outer wall of the filling base 11 or not, and place the filling base 11 inside the inner ring of the restraining ring 12. There is no contact force on both contact surfaces before charging and thrusting. A thrust is applied to the upper surface of the round base body using a jack or a pressure machine, and the filling base body 11 is pressed down by the inner ring of the restraint ring 12 to obtain the prestress restraint block 1, the filling base body 11 and the restraint ring 12. The elastic recovery force of the restraint ring 12 presses and temporarily clamps the filling base 11 due to the interference tolerance of the , and applies a prestress force in the radial direction thereof.

Specifically, the filling frustum 11 in FIG. 2 is a regular hexagonal frustum, and the inner ring wall of the restraint ring 12 is a regular hexagonal frustum cavity. The material of the filling platform 11 is one of ceramic, concrete or glass, and the material of the restraining ring 12 is steel, aluminum alloy, titanium alloy or fiber reinforced polymer material. The assembly method is to put the restraint ring 12 on the platform, apply epoxy resin, glass rubber to the inner ring wall of the restraint ring 12 and the outer wall of the filling base 11 or not, and place the filling base 11 on the restraint ring 12. Both contact surfaces are free of contact force prior to loading the big end opening and applying thrust. A vertically downward thrust force is applied to the upper surface of the filling base body 11 using a jack or a pressure machine, and the filling base body 11 is pushed down by the inner ring of the restraint ring 12 to obtain the prestress restraint block 1 . Due to the interference tolerance between the filling base 11 and the restraining ring 12, the elastic recovery force of the restraining ring 12 presses and temporarily tightens the filling base 11 and applies a prestress force in the radial direction thereof.

<Example 2>
At least one of the filling platform 11 and the restraining ring 12 in this embodiment adopts a combined structure. The filling platform 11 may be a combination platform consisting of a first variable diameter ring 14 and a cylindrical or prismatic body fixed within the first variable diameter ring 14 . The restraining ring 12 may be a combination ring structure consisting of a second variable diameter ring 13 and a constant cross section cylindrical ring or prismatic ring, the second variable diameter ring 13 being fixed to the constant cross section cylindrical ring or prismatic ring. It is Both the axial cross sections of the first variable diameter ring 14 and the second variable diameter ring 13 are wedge-shaped cross sections, and the outer wall of the first variable diameter ring 14 and the inner ring wall of the second variable diameter ring 13 It has a conical or pyramidal surface.

Referring to FIG. 5a, the filling base body 11 in the figure adopts a truncated cone body or a truncated pyramid body similar to the first embodiment, and the restraining ring 12 has a second variable diameter ring 13 fixedly fitted therein. The inner ring wall of the second variable diameter ring 13 is the conical or polygonal pyramidal inner ring wall of the restraint ring 12 .

Referring to FIG. 5b, the filling base body 11 in the figure adopts a cylindrical body or a prismatic body with the first variable diameter ring 14 fixedly fitted on the outside, and the outer wall of the first variable diameter ring 14 is It is the conical surface or polygonal pyramidal surface outer wall of the filling base body 11, and the restraint ring 12 adopts an integral variable diameter ring body with the same conical surface or polygonal pyramidal surface inner ring wall as in the first embodiment. .

Referring to FIG. 5c, the filling base body 11 in the figure adopts a cylindrical body or a prismatic body with the first diameter-varying ring 14 fixedly fitted on the outside, and the outer wall of the first diameter-varying ring 14 is: The outer wall of the conical surface or polygonal pyramidal surface of the filling platform 11, and the restraining ring 12 adopts a cylindrical ring or a prismatic ring with a second diameter-varying ring 13 fixedly fitted therein, and the second diameter-varying The inner ring wall of ring 13 is the conical or polygonal pyramidal inner ring wall of constraining ring 12 .

The second variable diameter ring 13 in this embodiment is used to adjust the inclination angle of the inner wall of the uniform cross-section restraint ring 12, and the first variable diameter ring 14 is used to adjust the inclination angle of the outer surface of the uniform cross-section filling base body 11. The constant cross-section restraint ring and the constant cross-section filling block are converted into a combined restraint ring and a combined filling block through a variable diameter ring, respectively, to form a combined restraint ring and a combined filling See Example 1 for the dimensions of the pedestal. The variable diameter ring is connected and fixed with the base or the restraining ring by means of fitting, welding or gluing connection. The material of the variable diameter ring can be a metal with relatively good toughness and relatively high rigidity, or an elastoplastic material such as a fiber-reinforced polymer, such as an aluminum alloy or a low-strength steel. , causing the filling block and the restraining ring to stick together more.

<Example 3>
Referring to FIG. 6, in addition to Example 1, in this example, the outer surface of the filling base 11 is covered with a coating layer 17 . In an embodiment, before the filling platform 11 is pressed into the restraining ring 12, its outer surface is coated with a relatively thin metal, e.g., a metallic material such as a molten aluminum alloy or iron alloy, or the The surface of the filling base 11 is covered by attaching and covering a fiber-reinforced polymer material such as carbon fiber, glass fiber, Kevlar fiber, ultra-high molecular weight polyethylene fiber-reinforced epoxy resin, or fiber-reinforced phenolic resin. Layer 17 is formed. After that, the filling base 11 covering the covering layer 17 is press-fitted into the inner ring of the restraining ring 12 . By forming the coating layer 17 by coating the outer surface of the filling base 11 with a tough material, the ability of the filling base 11 to withstand multiple attacks can be increased, and the material of the filling base 11 can withstand impacts. It is possible to prevent secondary damage caused by scattering after being dropped.

<Example 4>
As shown in FIGS. 7a and 7b, the filling base 11 in this embodiment adopts multi-layer filling material, and the filling base 11 is a first filling block laminated and bonded in sequence from top to bottom. 111, an intermediate layer 113 and a second filling block 112. The first filling block 111 and the second filling block 112 are made of the same material as the filling base body, and are made of two pieces. There are intermediate layers or gaps between the packed blocks.

When assembling, after pressing the lower second filling block 112 into the inner ring of the restraining ring 12, like the method of FIG. The block 111 can be pressed in to obtain the prestressed constraint block 1 . 7b, first, the first filling block 111, the intermediate layer 113 and the second filling block 112 are sequentially attached to the filling base body 11, and then the entire filling base body 11 is attached to the restraining ring 12. It can be press-fitted into the inner ring. The material of the intermediate layer 113 may be selected from at least one of foam metal, metal layer, graphite encapsulation layer, rubber, polymer porous material, resin adhesive, or air layer. is preferably foamed aluminum.

The filling block adopting multi-layer filling block structure can reduce the impact damage range and degree of destruction of the filling block. and the material of the filling block may be selected from at least one of ceramic, concrete, glass and metal materials, and the outer facing layer is preferably of ceramic material.

In the present embodiment, a covering layer 17 may be provided on the entire surface of the filling base body 11, as in the method of the fourth embodiment, on the surface of the filling base body 11 adopting the multi-layer filling material.

In addition, when the filling truncated pyramid body 11 adopts a polygonal truncated pyramid body structure, the truncated pyramid body is arranged and combined in a plane from a plurality of small prismatic bodies to a large pyramid filled truncated body in order to reduce the damage area. A large truncated pyramid may be fitted within the restraining ring 12 and prestressed. The top surface or bottom surface of the filling platform 11 may be flat, or may be provided with spherical crown projections, pyramidal projections, or other surplus methods.

<Example 5>
The constraining ring 12 is provided with a bottom plate structure, as shown in FIG. Alternatively, the pad layer 15 is provided in the bottom small end opening of the second diameter-varying ring 13 in the second embodiment. is filled with an energy-absorbing pad layer 15, after which the filling platform 11 is press-fitted and prestressed. The padding layer 15 may employ a porous material or foamed metal, such as foamed aluminum, or may employ a polymeric material such as rubber as a cushioning material.

<Example 6>
As shown in FIG. 9, the bottom plate structure of the restraint ring 12 in this embodiment differs from that in the fifth embodiment, and the restraint ring 12 in this embodiment is a restraint groove bottom plate 16 integrally formed with the restraint ring 12. That is, the constraining groove bottom plate 16 is integrally formed with the outer wall of the constraining ring 12 , the constraining groove bottom plate 16 seals the bottom small end of the constraining ring 12 , forming a channel-shaped constraining ring, and the filling platform 11 into the constraining ring 12, the upper surface of the constraining groove bottom plate 16 may first be filled with a relatively thin foamed aluminum pad layer, and then the filling base 11 may be press-fitted. The bottom surface of the pedestal 11 and the restraining groove bottom plate 16 are adhered together. The constraining groove bottom plate 16 to some extent increases the bending resistance of the prestress constraining block and to some extent acts as an armor backing plate.

<Example 7>
As shown in FIG. 10, the restraint ring 12 in this embodiment is provided with a locking groove 18 inside the large end of the inner ring wall, and the filling base 11 is press-fitted into the inner ring of the restraint ring 12, After reaching the predetermined position, the locking ring 19 is installed in the locking groove 18 of the restraining ring 12 to axially restrict the filling base 11, and the big end of the filling base 11 in the axial direction. Since the dimension is much larger than the inner ring small end opening of the restraining ring 12, the filling base body 11 after wedging cannot escape from the small end of the restraining ring 12, and the large end inner ring of the restraining ring 12 cannot escape. The assembly of the locking ring 19 to the wall effectively prevents the filling platform 11 from slipping out of the large end of the restraining ring 12 when subjected to impact.

The locking ring 19 adopts an elastic opening locking ring, which is convenient for installation. By pushing out the damaged filling base 11 in the opposite direction, a new filling base 11 can be replaced and the damaged or destroyed armor structure can be quickly repaired.

In order to machine the locking groove in the inner ring wall of the big end of the restraining ring 12, after assembling the locking ring 19, the surface of the filling base 11 is lower than the top surface of the restraining ring 12, and the metal plate, epoxy It may be filled and flushed with a resin or polymeric material such as polyurea.

This embodiment may be applied to the prestressed restraint blocks in Examples 1-6, and depending on the transverse cross-sectional shape of the filling platform and restraint ring, a corresponding circular open locking ring or polygonal locking ring may be used. A landing locking ring may be selected and used.

<Example 8>
This example discloses one specific embodiment of the composite armor structure of the present invention. As shown in Figure 11a, this composite armor structure comprises one layer of armor plates joined by a number of prestress constraining blocks 1, the prestress constraining blocks 1 in this example being regular hexagonal in cross-section. It adopts a platform 11 and a restraining ring 12 and paves a continuous armor plate extending along the lateral direction. The restraint ring 12 is made of high-strength steel, and the regular hexagonal packing block 11 is made of one or more of ceramic, concrete, and glass.

FIG. 11b discloses a composite armor structure comprising two layers of the armor plates of FIG. Through the block 1, the prestress restraint block seam of the single-layer composite armor structure reinforces the weak protection area and increases the protection effect of the composite armor structure. In practical applications, different numbers of laminated armor plates may be employed, depending on the protection requirements and overall armor thickness.

In the armor plates in FIGS. 11a and 11b, the joined prestress restraint blocks 1 are both split restraint rings, i.e. all the restraint rings 12 and the filling platform 11 are combined into a single prestress restraint block. After assembly to 1, all prestress restraint blocks 1 are jointed and paved. Another armor plate pavement scheme is disclosed in Fig. 11c, that is, the restraint rings 12 of all prestress restraint blocks 1 adopt an integrated honeycomb structure, and all the restraint rings 12 are integrated are connected to form an integral restraining ring 121 and fixed together by welding or by directly machining the hexagonal inner ring walls of all restraining rings 12 on one integrated plate structure. , forming a honeycomb plate structure, and then assembling all the filling bases 11 to the corresponding inner ring of the restraining ring one by one, so that the integrated joint restraining ring 121 improves the integrity of the armor plate.

<Example 9>
This example discloses a more specific embodiment of the composite armor structure of the present invention. Cover and stick. The cover plate 2 is used to improve the appearance of the outer armor and improve the armor protection effect to some extent, and the back plate 3 improves the impact strength of the inner armor.

The mounting method of the cover plate 2 or the back plate 3 is to use an adhesive to adhere to the prestress restraint block 1 of the armor plate, or to use bolts to anchor the cover plate 2 or the back plate 3 to the armor plate. , wherein the bolts can be anchored through pre-drilled holes in the cover plate 2 or the back plate 3 .

The cover plate 2 is divided into single-layer, double-layer or multi-layer composite plate. Specifically, as shown in Figures 12a, 12b and 12c, the cover plate 2 that can be selected in this embodiment has three options: a single sheath layer, a sheath + containment layer, and a two-layer sheath + containment layer. divided into forms.

The cover plate 2 with a single-layer armor layer, as shown in FIG. , polyurea coating, and polycarbonate coating. The composite armor structure in Figures 14a and 14c is a cover plate 2, both of which have a first armor layer 21 laminated to the outer surface of the armor plate.

As shown in FIG. 12b, the cover plate 2 with a two-layer structure of armor layer+containment layer, the first armor layer 21 is preferably made of metal material such as steel plate, aluminum alloy, titanium alloy, or polymer material or fiber. Reinforced polymeric materials such as polyurea coatings, polycarbonate coatings are employed, and the containment layer 22 employs graphite materials to be laminated to the prestress restraint blocks. The composite armor structure in Figures 14b, 14d and 14e are each laminated with the cover plate 2 in Figure 12b to the outer surface of the armor plate, and the cover plate 2 in order from the distal end to the proximal end of the prestress restraint block. are laminated to the outside of the armor plate in the order of the first armor layer of steel plate + the graphite containment layer.

The cover plate 2 of the three-layer structure, which has three forms of double-layer + containment layer, as shown in FIG. or a polymer material or a fiber reinforced polymer material, such as polyurea coating, polycarbonate coating, the containment layer 22 adopts graphite material and laminated to the prestress restraint block, the second armor layer 23 is a copper alloy Adopting materials, from the far end to the near end of the prestress restraint block, the cover plate 2 with a three-layer structure is: one layer steel first armor layer + one layer copper plate second armor layer + graphite encapsulation layer are pasted on the outside of the armor plate in order.

Specifically, as shown in Figures 13a, 13b and 13c, the backing plate 3 is divided into single-layer, double-layer or multi-layer composite plates, comprising a collision layer 31, an energy absorption layer 32 and a resistance layer 33. At least one layer is included. The backing plate 3 in FIG. 13a is a single layer resistance layer 33 structure, the resistance layer 33 is made of one or more of metallic materials such as steel plate, aluminum alloy, titanium alloy, or polymer material or fiber reinforced polymer material. 14a and 14b, the composite armor structure in FIGS.

The back plate 3 in FIG. 13b is a two-layer structure of energy absorbing layer 32+resistive layer 33, and the resistive layer 33 is one or more of metal materials such as steel plate, aluminum alloy, titanium alloy, or polymer material or Employing a fiber reinforced polymer material, the energy absorbing layer 32 adopts one or more of foam metal, rubber. The composite armor structure in Figures 14c and 14d has the double layer backing 3 in Figure 13b laminated to the inner surface of the armor plate, and the energy absorbing layer 32 is provided in intimate contact with the armor plate.

The back plate 3 in FIG. 13c has a three-layer structure of collision layer 31 + energy absorption layer 32 + resistance layer 33, and the resistance layer 33 is made of one or more of metal materials such as steel plate, aluminum alloy, titanium alloy, or Adopt polymer material or fiber reinforced polymer material, energy absorption layer 32 adopts one or more materials of foam metal, rubber, collision layer 31 adopts metal material such as steel plate, aluminum alloy, titanium alloy or polymeric materials or fiber reinforced polymeric materials. The composite armor structure in Figure 14e has the triple layer backing 3 in Figure 13c laminated to the inner surface of the armor plate and the impact layer 31 is provided in intimate contact with the armor plate.

The armor plate to which the prestress restraint block 1 is joined may be used alone as a shell. is laminated to one of the two surfaces of the prestress restraint block, preferably attached to one surface adjacent to the large end of the filling platform, and the backing plate 3 is attached to the other surface. The cover plate 2, the back plate 3 and the prestress restraint block may be adhered with a resin-based adhesive or anchored with bolts.

The above are only some specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and it is possible to modify the present invention insubstantially using this concept. should be an act that infringes on the scope of protection of Any content that does not deviate from the technical solution of the present invention, and any simple modification, equivalent change and modification of the above embodiments according to the technical solution of the present invention are all subject to the technical solution of the present invention. Belong to the protection scope.

Experimental verification of the application of prestress and the penetration resistance effect simulation of the prestress restraint block in Example 1 will be performed below.

(1) Finite Element Model As described with reference to FIG. The wall is a circular cavity. The bed height h ₁ of the packed bed was 40 mm and the height h ₂ of the restraining ring 12 was 50 mm. The generatrix of the filling base 11 and the generatrix of the inner ring wall of the restraining ring 12 are both straight lines, the included angle α between the generatrix of the filling base 11 and the height is 3°, and the included angle between the generatrix of the inner ring wall of the restraining ring 12 and the height is β=3°. The diameter d1 of the large end of the top surface of the packed base body 11 was ₁₀₀ mm, and the diameter d2 of the small end of the _bottom surface was 95.8 mm. The inner ring wall of the restraint ring 12 had a top large end inner diameter _R1 of 100 mm and a bottom small end inner diameter _R2 of 94.8 mm. The interference tolerance between the outer diameter of the bottom small end of the filling base 11 and the inner diameter of the bottom small end of the restraining ring 12 is 1 mm, the height of the restraining ring is greater than the height of the filling base, and the inner ring wall inclination of the restraining ring Since the angle is the same as the outer wall inclination angle of the filler platform, as the filler platform is pushed downward into the restraining ring until both small ends are flush, the outer diameter of the top large end of the filler platform 11 and the inner ring wall of the restraining ring 12 may have the same interference tolerances as the small end. The outer diameter of the restraining ring 12 was 110 mm, the top wall thickness of the restraining ring 12 was 5 mm, and the bottom wall thickness was 7.6 mm. The material of the filling platform 11 was one of ceramic, concrete or glass, and the material of the restraining ring 12 was steel, aluminum alloy, titanium alloy or fiber reinforced polymer material.

For the prestress restraint block, an explicit finite element program LS-DYNA was adopted to build a three-dimensional numerical model of prestress application and bullet penetration when a concrete round table is pressed into a steel restraint ring. A finite element model and mesh partition of the prestressed restraint block was constructed based on the geometry of the filling base and restraint ring, and the model consisted of a circular restraint ring, a circle, a bullet, and a backing plate, as shown in FIG. and a thrust block, modeled with an 8-node solid hexahedral unit (*SECTION_SOLID), and based on the symmetry condition, constructed only a 1/4 model that is symmetrical along the zy and zx planes. The average size of the round table unit and the constraining ring unit was about 1.25 mm, the total number of concrete round table units was 49,152, and the total number of constraining ring units was 10,240. The bullet had an average mesh size of 1.25 mm and was divided into a total of 300 units. The critical condition of the backing plate is fixed, and the surface contact (keyword * CONTACT_AUTOMATIC_SURFACE_TO_SURFACE) is adopted between the restraining ring, the round table, the backing plate and the thrust block, the static friction coefficient between both is 0.08, the dynamic friction coefficient was 0.06. Bullet-to-concrete contact was achieved using the keyword *CONTACT_ERODING_SURFACE_TO_SURFACE.

(2) Concrete material model Concrete material adopts HJC model, concrete density is 2400 kg/m ³ , strength is 170 MPa, and specific parameters are shown in Table 1. In order to avoid distortions in the unit causing an hourglass effect and affecting the stability of the computation, we introduce the *MAT_ADD_EROSION erosion failure criterion to control the failure of the unit at the maximum principal strain. In the simulation process, if the maximum principal strain of a unit with a target exceeded this strain value, this unit was considered to be a failure and was deleted, with a failure strain of 0.1.

(3) Steel material model The material of the restraining ring and the bullet is *MAT_PLASTIC_KINEMATIC material model, and the main parameters of the material model are shown in Table 2.

(4) Loading Requirements The loading requirements and the test protocol were divided into two stages. In the first stage, a simulated test was performed to apply prestress by pressing down the round table, and then in the second stage, a simulated penetration test was performed. The first stage adopts the keyword *BOUNDARY_PRESCRIBED_MOTION_SET to impart displacement to the thrust block, propel the concrete round table to the designated depth of the steel ring, the loading rate is 200mm/s, stabilize for 10ms, and restart accordingly generated the file. The bullet does not move in the first stage and after the first stage, a second stage simulation is performed using the full restart function in LS-DYNA to give the bullet velocity with the keyword *CHANGE_VELOCITY_GENERATION and with the keyword *STRESS_INITIALIZATION. transfers the stress state of each component in the previous process to the corresponding component in the restart process. The bullet was a flathead bullet with a diameter of 7.62 mm, a length of 20 mm and an initial velocity of 600 m/s.

(4) Prestress simulation results and analysis After pressing down the concrete filling platform by 10 mm, the center unit prestress-pressing depth relationship curve of the filling platform is as shown in FIG. As the depth increases, the internal stress of the pedestal gradually increases. When the depression depth is 10 mm, the average radial stress of the pedestal axis unit is 169 MPa. It has been demonstrated that the magnitude of the stress can be adjusted and sufficient prestress can be applied.

(5) Penetration simulation result analysis The depression depth of the inner ring of the restraint ring of the filling base body is 0 to 10 mm, and the depression displacement is classified into a total of 10 stages. The directional prestress gradually increases, and under the frontal impact of a 600m/s flat head bullet, the damage cloud image of the packed platform concrete round table at each step depression depth is shown in FIG. 19, the penetration depth gradually decreases as the prestress increases, and if the depression depth is 7 mm, that is, the filling It was found that when the prestress applied to the center of the platform was 119 MPa, the penetration depth of the packed platform was reduced by 37.5%, achieving optimal anti-penetration performance. On the other hand, as the prestress increased further, its penetration resistance decreased. Therefore, if a reasonable prestress value is applied using the prestress restraint block of the present invention, the penetration resistance performance of the composite armor member can be greatly improved.

REFERENCE SIGNS LIST 1 prestress constraining block 11 packing platform 111 first packing block 112 second packing block 113 intermediate layer 12 constraining ring 121 joint constraining ring 13 second variable diameter ring 14 first variable diameter ring 15 pad layer 16 restraint Groove bottom plate 17 Coating layer 18 Locking groove 19 Locking ring 2 Cover plate 21 First armor layer 22 Containment layer 23 Second armor layer 3 Back plate 31 Collision layer 32 Energy absorption layer 33 Resistance layer

Claims (17)

A prestressed restraint block for use in composite armor, comprising a filler platform (11) and a restraining ring (12), said filler platform (11) having the same cross-section as the inner race of the restraining ring (12). and is fixedly fitted to the inner ring of the restraint ring (12), and the outer wall of the filling platform (11) and the inner ring wall of the restraint ring (12) are wedged by conical fitting. and
The prestress restraint block, characterized in that the outer wall of the filling platform (11) and the inner ring wall of the restraint ring (12) are respectively matching conical surfaces or matching polygonal pyramidal surfaces. The diameters of the large end and the small end of the outer wall of the filling platform (11) _{are respectively} d1 and d2, and the diameters of the large end and the small end of the inner ring wall of the restraining ring (12) are: R ₁ and R ₂ respectively, satisfying R ₂ < d ₂ < R ₁ ≤ d ₁ , the heights of the filling platform (11) and the restraining ring (12) being h ₁ and h ₂ respectively; The preheater according to claim 1, wherein h ₁ ≤ h ₂ and the diameter-thickness ratio d ₁ /h ₁ of the filling base (11) is 0.5 to 40. stress constraint block. The range of the cone inclination angle α of the outer wall of the filling platform (11) is 1° to 10°, and the range of the cone inclination angle β of the inner ring wall of the restraint ring (12) is 1° to 10°. There is an angular difference Δα between the outer wall of the filling base (11) and the inner ring wall of the restraint ring (12), Δα=α−β, and the range of Δα is 0°. 2. The prestress restraint block of claim 1, wherein .about.0.5°. The filling frustum (11) is a frustum with a conical surface or a polygonal pyramidal surface outer wall,
Or it is a cylindrical or prismatic body with a first variable diameter ring (14) fixedly fitted on the outside, and the outer wall of the first variable diameter ring (14) is a conical surface or a polygonal pyramidal surface. , the restraint ring (12) is a variable diameter ring body having a conical surface or a polygonal pyramid surface inner ring wall,
Or it is a cylindrical ring or a prismatic ring in which the second variable diameter ring (13) is fixedly fitted, and the inner ring wall of the second variable diameter ring (13) is a conical surface or a polygonal pyramidal surface. 2. A prestress restraint block according to claim 1, characterized in that . 5. A prestressed restraint block according to claim 4, characterized in that the filling platform (11) is a split layer structure comprising at least two layers of fixedly stacked filling blocks. A coating layer (17) is provided on the outer surface of the filling base (11), and the coating layer (17) is made of aluminum alloy, iron alloy, titanium alloy, carbon fiber, glass fiber, Kevlar. A prestress according to any one of claims 4 to 5, characterized in that it is a tough material comprising at least one of fibers, ultra-high molecular weight polyethylene fiber reinforced epoxy resin, and fiber reinforced phenolic resin material. restraint block. A bottom plate structure is provided at the small end of the inner ring wall of the restraint ring (12) or the second variable diameter ring (13), and the bottom plate structure is a restraint groove integrated with the restraint ring (12). 5. A prestress restraint block according to claim 4, characterized in that it is a bottom plate (16) or a padding layer (15) laid under the small end of the filler platform (11). A locking groove (18) is formed in the inner wall of the restraining ring (12), and the filling base body (11) after wedging is placed in the locking groove (18) in the restraining ring (12). 5. Prestress restraint block according to claim 4, characterized in that a locking ring (19) is mounted in 12) for axial position limitation. The filling truncated body (11) is a truncated cone, a square truncated pyramid, or a hexagonal truncated pyramid, and the inner ring wall of the corresponding restraint ring (12) is a truncated cone cavity, a truncated square pyramid, or a hexagonal truncated pyramid, respectively. 2. A platform cavity, according to claim 1, characterized in that the filling platform (11) is of ceramic, concrete or glass material and the restraining ring (12) is of metal or fibre-reinforced composite material. prestress constraint block. The filling base (11) adopts a multi-layer filling material, and the filling base (11) is composed of a first filling block (111) and an intermediate layer (113), which are sequentially laminated and bonded from top to bottom. and a second filling block (112), the first filling block (111) and the second filling block (112) are made of the same material as the filling base, There is an intermediate layer or gap between the filling blocks, and the material of the intermediate layer (113) is one of foam metal, metal layer, graphite containment layer, rubber, polymer porous material, resin adhesive, or air layer. 6. The prestress restraint block according to claim 5, wherein at least one is used selectively. A composite armor structure comprising at least one armor plate, said armor plate comprising a prestress restraint block according to any one of claims 1 to 10, said prestress restraint block comprising several A composite armor structure, characterized in that it is bonded with a split body restraint ring (12) or employs a monolithic honeycomb structure restraint ring (12). It further includes a cover plate (2) and a back plate (3) that are laminated and covered on both surfaces of the composite armor, or one of the cover plate (2) or the back plate (3) is attached to one surface thereof. Paste one plate of
The cover plate (2) is a single-layer composite plate of the first exterior layer (21), and the first exterior layer (21) is laminated to the outer surface of the armor plate, or the lid plate ( 2) is a two-layer composite plate in which a first armor layer (21) + a containment layer (22) are sequentially arranged and adhered, and another surface of the containment layer (22) is the outer surface of the armor plate. or the lid plate (2) is a three-layer composite plate in which the first exterior layer (21) + the second exterior layer (23) + the containment layer (22) are sequentially arranged and bonded, The other surface of the containment layer (22) is laminated to the outer surface of the armor plate, and the first armor layer (21) adopts steel plate, aluminum alloy, titanium alloy material, polyurea coating, or polycarbonate coating. , the second armor layer (23) adopts a copper alloy material, the encapsulation layer (22) adopts a graphite material, and the back plate (3) is a single-layer structure of a resistive layer (33). The resistance layer (33) is laminated directly to the inner surface of the armor plate, or the back plate (3) is an energy absorption layer (32) + resistance layer (33) which are sequentially arranged and adhered. The other surface of the energy absorbing layer (32) is in close contact with the inner surface of the armor plate, or the back plate (3) is a collision layer (31) + energy absorbing layer (32) + It has a three-layer structure in which resistance layers (33) are sequentially arranged and adhered, the other surface of the collision layer (31) is in close contact with the inner surface of the armor plate, and the resistance layer (33) is made of steel plate and aluminum. Adopting one or more of alloy, titanium alloy metal material, or polymer material or fiber reinforced polymer material, said energy absorbing layer (32) adopts one or more materials of foam metal, rubber The composite armor structure according to claim 11, wherein said impact layer (31) adopts one or more of steel plate, aluminum alloy, titanium alloy metal material, or polymer material or fiber reinforced polymer material. A step of making a filling base (11), a restraining ring (12) matching said filling base (11), wherein the diameter of the large end and the small end of the outer wall of said filling base (11) is , d1 and _d2 , _respectively , the cone inclination angle of the outer wall is α, the height is h1, and the diameters of the large and small ends of the inner ring wall of the restraining ring ( ₁₂ ) are , R ₁ and R ₂ respectively, the cone inclination angle of the inner ring wall is β, the height is h ₂ , the filling platform (11) and the restraining ring (12) are R ₂ <d ₂ < R ₁ ≤ d ₁ , α = β, h ₁ ≤ h ₂ , step 1;
The restraining ring (12) is placed on the platform, and the inner ring wall of the restraining ring (12) and the outer wall of the filling base (11) are coated with temporary lubricant, epoxy resin or glass rubber, and then the filling base (11) is ) into the inner ring of the restraint ring (12), before the thrust is applied, both contact surfaces have no contact force, at this time the top surface of the filling platform (11) and the restraint ring Step 2, wherein the height difference between the top surface of (12) is h3 and the height difference between the bottom surface of the platform and the bottom surface of the restraining ring is h4;
Using a jack, hydraulic machine or bolt fastening method, the filling base (11) is pressed in the direction of altitude and pressed into the restraint ring (12), and the elastic recovery force of the restraint ring (12) is applied. presses the filling base (11) inward to temporarily tighten it, and applies a prestress force in its radial direction. when the radial prestressing force (12) exerts on the filler platform (11) is increased and presses the filler platform (11) into place, obtaining a prestressed restraint block (1), step 3;
Assembling several said prestress restraint blocks (1) into a single ply armor plate or adhesively laminating said single ply armor plate to a multi ply armor plate and adjoining prestress restraint blocks in said single ply armor plate. between (1) adopts at least one connection method of direct contact, adhesive bonding or welding; 4. A method of fabricating a composite armor structure, characterized in that it is staggered and distributed. When the filling base body (11) is made of concrete, the filling base body (11) is directly cast using the restraint ring (12) as a frame plate, and before pouring concrete. 2, apply isolation oil or place isolation film inside the restraint ring (12) in advance, reserve the press-fit space after concrete molding at the bottom of the restraint ring (12), and restrain until the concrete has strength. The bottom of the ring is supported or fixed, and the filling base (11) is further pressed into the restraining ring (12) to create a radial prestress in the filling base (11) to obtain an armor plate. 14. The method of making a composite armor structure according to claim 13. Said single-layer armor plate is obtained by adopting another armor plate pavement method, that is, the restraint rings (12) of all prestress restraint blocks (1) adopt an integrated honeycomb structure, and all The restraining rings (12) are connected in an integrated joint restraining ring (121) and either fixed together by welding or all restraining rings on one integrated plate structure. The inner ring wall of (12) is directly processed to form a honeycomb plate structure, and then all the filling base bodies (11) are assembled into the corresponding inner ring of the restraint ring one by one to form an armor plate. 14. A method of fabricating a composite armor structure according to claim 13, comprising assembling. The height of the restraining ring (12) is greater than the thickness of the filling base (11), and before the filling base (11) is pressed into the inner ring of the restraining ring (12), the restraining ring (12) is first The bottom of the inner ring is filled with an energy absorbing pad layer (15), or the upper surface of the constraining groove bottom plate (16) is filled with a thin pad layer (15), and then the filling platform (11) is pressed into the prestress , and the padding layer (15) adopts foamed aluminum material or, as a cushioning material, rubber polymer material. A method for making a composite armor structure. A cover plate (2) and a back plate (3) are laminated on both sides of the armor plate respectively, integrated into a composite armor structure, the cover plate (2) being close to the big end of the filling platform. mounted on one side and the back plate (3) mounted on another side,
The cover plate (2) and the back plate (3) are bonded to the prestress restraint block (1) of the armor plate by using resin adhesive, or bolts are used to attach the cover plate (2) and one or both of the back plate (3) are anchored to said armor plate and said bolts are anchored through spare holes in cover plate (2) or back plate (3). A method of making a composite armor structure according to any one of claims 13-15.

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