Impact-resistant composite material structure

Abstract

The application discloses an impact-resistant composite material structure, wherein an upper impact-resistant interlayer and a lower impact-resistant interlayer are both composed of two supporting plates and a core layer structure fixed between the two supporting plates; the core layer structure is composed of arc surface plates and plane plates; a plurality of arc surface plates are equidistantly arranged, and two adjacent arc surface plates are connected through a plane plate; in a middle circular tube impact-resistant layer, wave crests and wave troughs of a curve cross-section core layer are respectively fixed with an outer layer circular tube and an inner layer circular tube; and the upper impact-resistant interlayer and the lower impact-resistant interlayer are fixed with a plurality of supports arranged in an array on outer surfaces of outer supporting plates. The upper and lower impact-resistant interlayers of the application absorb vertical loads, the supports arranged in an array and the square wave plates equidistantly arranged on each support can adapt to complex and changeable stress environments, the middle circular tube impact-resistant layer effectively absorbs radial impact loads through deformation of the curve cross-section core layer, and a light-weight, high-strength and impact-resistant composite material structure is obtained through combination design of the multi-layer impact-resistant interlayer structure.

Description

Technical Field

[0001] This invention relates to the field of composite material technology, and in particular to a lightweight, high-strength, impact-resistant composite material structure. Background Technology

[0002] With the continuous development of science and technology, composite materials are increasingly widely used in various industrial fields. Composite materials can leverage the advantages of various materials and overcome the defects of single materials, thereby expanding the application range of materials. However, in practical applications, composite material structures often face various impact loads, making it particularly important to improve their impact resistance. Currently, although traditional composite material structures have high specific strength and specific modulus, they still have shortcomings in impact resistance. Under impact, traditional composite material structures are prone to damage such as interlaminar delamination and fiber breakage. To address this issue, many researchers are dedicated to developing new impact-resistant composite material structures to improve their performance under impact loads. Existing impact-resistant composite material structures typically employ methods such as enhancing the interfacial bonding between fibers and the matrix, optimizing structural design, and introducing energy-absorbing materials to improve impact resistance. For example, using special fiber layup designs can increase the impact resistance of composite materials. However, these methods still have some problems in practical applications, such as high manufacturing costs and complex processes. Summary of the Invention

[0003] To address the aforementioned issues, this invention proposes an impact-resistant composite material structure. Through a multi-layer impact-resistant layer structure design, it ensures overall lightweight while significantly improving strength and toughness, solving problems such as interlayer delamination and fiber breakage, thus enabling the invention to more effectively disperse and absorb energy when subjected to external impacts.

[0004] The solution adopted by this invention to solve the technical problem is as follows:

[0005] This invention discloses an impact-resistant composite material structure, comprising an upper impact-resistant interlayer, a middle circular tube impact-resistant layer, a lower impact-resistant interlayer, and a support. The upper and lower impact-resistant interlayers have identical structures, each consisting of two support plates and a core layer structure fixed between the two support plates. The core structure consists of an arc-shaped panel and a flat panel. The arc-shaped panel is composed of multiple corrugated plates integrally formed and connected sequentially along a straight line. The multiple arc-shaped panels are equidistantly arranged, and in each pair of adjacent arc-shaped panels, the peaks of the outermost arc-shaped panel are connected to the adjacent troughs of the other arc-shaped panel via a flat panel. The two arc-shaped panels closest to the two support plates are fixed to their respective support plates. The intermediate circular tube impact-resistant layer consists of an outer circular tube, a curved section core layer, and an inner circular tube. The curved section core layer is composed of multiple corrugated plates integrally formed and connected sequentially along the circumference. The peaks and troughs of the curved section core layer are fixedly connected to the outer and inner circular tubes, respectively. The upper and lower impact-resistant interlayers are arranged back-to-back, and multiple supports arranged in an array are fixed to the outer surface of the support plate of the upper and lower impact-resistant interlayers. The supports consist of square corrugated plates and crossbeams. The two crossbeams are spaced apart and fixedly connected by multiple square corrugated plates arranged at equal intervals.

[0006] Preferably, the thickness of the upper and lower impact-resistant interlayers is 20 mm, and the thickness of the middle circular tube impact-resistant layer is 80 mm; the upper and lower impact-resistant interlayers are processed by 3D printing.

[0007] Preferably, the angle between the planar plate and the support plate is 45° to 60°, and the adjacent planar plates are arranged in a figure-eight or inverted figure-eight shape.

[0008] Preferably, the support plate and the arc panel are both made of aramid-reinforced resin-based composite material, and the flat panel is made of resin-based glass fiber composite material.

[0009] Preferably, the intermediate circular tube impact-resistant layer is made of carbon fiber reinforced resin matrix composite material, wherein the outer and inner circular tubes are stacked with 0° fiber orientation along the thickness, and the stacking order of the curved section core layer along the thickness can be [±45 / ±30 / ±15]. s .

[0010] Preferably, the outer circular tube has a diameter of 20-22 mm, and the inner circular tube has a diameter of 16-18 mm.

[0011] Preferably, the core layer with curved cross-section has 6 to 9 peaks, and the central angle corresponding to the peaks of the core layer with curved cross-section is 20° to 30°.

[0012] Preferably, the bracket is obtained by curing carbon fiber reinforced resin matrix composite material using a hot pressing process.

[0013] Preferably, the square wave plate has a square height of 20mm, a square width of 20mm, and a square thickness of 5mm; the spacing between adjacent square wave plates is 36mm.

[0014] More preferably, the carbon fiber to resin mass ratio of the carbon fiber reinforced resin matrix composite material is 1:1.5.

[0015] The beneficial effects of this invention are:

[0016] This invention features a multi-layered impact-resistant structure. The upper and lower impact-resistant interlayers serve as the first core, primarily absorbing vertical impact loads. The core structure within the upper and lower impact-resistant interlayers is a combination of low density, corrugated surfaces, and reinforcing ribs. When the upper and lower impact-resistant interlayers are subjected to impact loads, the core structure achieves force equilibrium through the continuous arc surface of the curved panels. During stress, the external load is effectively transferred along the continuous arc surface, effectively absorbing vertical impact loads, enhancing the structure's impact resistance, and effectively protecting the structure from damage. The curved panels are connected by flat plates arranged in a figure-eight or inverted figure-eight shape, providing reinforcing rib characteristics and achieving lightweight design. Furthermore, the upper and lower impact-resistant interlayers utilize arrayed supports on their outer surfaces and equally spaced square corrugated plates on each support to enhance load-bearing capacity, enabling them to adapt to complex and variable stress environments. The intermediate circular tube impact-resistant layer, serving as the second core, effectively absorbs radial impact loads primarily through the deformation of the curved cross-section core. It utilizes fiber-reinforced composite materials, with the inner and outer circular tubes employing a 0° fiber orientation, effectively enhancing the tube's load-bearing capacity. The curved cross-section core layer, however, is [±45 / ±30 / ±15]. s The fiber orientation design achieves stable control of deformation behavior, resulting in a lightweight yet highly impact-absorbing intermediate circular tube impact-resistant layer. Therefore, the upper impact-resistant interlayer, lower impact-resistant interlayer, and intermediate circular tube impact-resistant layer all significantly enhance the compressive and flexural strength of the impact-resistant composite material structure of this invention. Through the combined design of the upper impact-resistant interlayer, intermediate circular tube impact-resistant layer, lower impact-resistant interlayer, and support structure, this invention achieves a lightweight, high-strength impact-resistant composite material structure that enhances load transfer capacity, improves overall load-bearing capacity, and enhances overall mechanical properties and toughness. It exhibits significant energy absorption characteristics under impact loads, providing a new solution for energy absorption and protection in engineering applications. Furthermore, this invention not only possesses excellent impact resistance but also boasts advantages such as low manufacturing cost and simple process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the upper and lower impact-resistant interlayer sections of the present invention;

[0019] Figure 3 This is a schematic diagram of the cross-section of the intermediate circular tube impact-resistant layer of the present invention;

[0020] Figure 4 This is a schematic diagram of the bracket of the present invention;

[0021] Figure 5 This is a simulated deformation diagram of an impact-resistant composite material structure of the present invention under vertical impact load. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, an impact-resistant composite material structure includes an upper impact-resistant interlayer 1, a middle circular tube impact-resistant layer 2, a lower impact-resistant interlayer 3, and a support 4. Figure 2 As shown, the upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3 have the same structure, both consisting of two support plates 101 and a core layer structure fixed between the two support plates 101. The core structure consists of an arc panel 102 and a flat panel 103. The arc panel 102 is composed of multiple corrugated plates integrally formed and sequentially connected along a straight line. The multiple arc panels 102 are equidistantly arranged. In each pair of adjacent arc panels 102, the crests of the outermost arc panel 102 are connected to the adjacent troughs of the other arc panel 102 via a flat panel 103. The angle between the flat panel 103 and the support plate 101 is 45°–60°. Adjacent flat panels 103 are arranged in a figure-eight or inverted figure-eight shape. The two arc panels 102 closest to the two support plates 101 are fixed to their respective support plates 101. Both the support plate 101 and the arc panel 102 are made of aramid-reinforced resin-based composite material, while the flat panel 103 is made of resin-based glass fiber composite material. The core structure is a combination of low density, corrugated shape, and reinforcing ribs, which facilitates energy absorption. When subjected to vertical impact loads, it can quickly disperse and absorb energy, effectively protecting the structure from damage. Figure 3 As shown, the intermediate circular tube impact-resistant layer 2 consists of an outer circular tube 201, a curved cross-section core layer 202, and an inner circular tube 203. The curved cross-section core layer 202 is composed of multiple corrugated plates integrally formed and connected sequentially end-to-end along the circumference. The crests and troughs of the curved cross-section core layer 202 are fixedly connected to the outer circular tube 201 and the inner circular tube 203, respectively. While ensuring a lightweight overall structure, the intermediate circular tube impact-resistant layer 2 also enhances the deformation energy absorption effect when subjected to radial impact, thereby ensuring the overall structural stability of the invention. The intermediate circular tube impact-resistant layer 2 is made of carbon fiber reinforced resin matrix composite material, which is obtained by stacking and curing carbon fiber reinforced resin matrix composite material impregnated material along the thickness in a set direction. The outer circular tube 201 and the inner circular tube 203 are stacked with 0° fiber orientation along the thickness, and the stacking order of the curved cross-section core layer 202 along the thickness can be [±45 / ±30 / ±15].s The upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3 are arranged back to back, and multiple supports 4 arranged in an array are fixed to the outer surface of the outer support plate 101 of the upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3. Figure 4 As shown, the support 4 is composed of square corrugated plates and crossbeams; the two crossbeams are spaced apart and fixedly connected by multiple square corrugated plates arranged at equal intervals; the arrayed support 4 and the square corrugated plates arranged at equal intervals enhance the load-bearing capacity of the upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3, and can adapt to complex and variable stress environments; the support 4 is obtained by hot pressing process to cure and mold high-strength and high-toughness carbon fiber reinforced resin matrix composite material.

[0024] In a preferred embodiment, the upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3 are 20 mm thick, and the middle circular tube impact-resistant layer 2 is 80 mm thick. The upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3 can be manufactured using 3D printing.

[0025] In a preferred embodiment, the carbon fiber to resin mass ratio of the carbon fiber reinforced resin matrix composite is 1:1.5.

[0026] As a preferred embodiment, such as Figure 3 As shown, the outer circular tube 201 has a diameter of 20-22 mm, and the inner circular tube 203 has a diameter of 16-18 mm.

[0027] In a preferred embodiment, the core layer 202 with curved cross-section has 6 to 9 peaks, and the central angle corresponding to the peaks of the core layer 202 with curved cross-section is 20° to 30°.

[0028] As a preferred embodiment, such as Figure 4 As shown, the square height of the square wave plate is 20mm, the square width of the square wave plate is 20mm, and the square thickness of the square wave plate is 5mm; the spacing between adjacent square wave plates is 36mm.

[0029] The core structure of the upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3 of this invention is a combination of low density, corrugated shape, and reinforcing ribs. When the upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3 are subjected to impact loads, the core structure achieves external force balance through the continuous arc surface of the arc panel 102. During the stress process, the external load is effectively transferred along the continuous arc surface, effectively absorbing vertical impact loads, enhancing the impact resistance of the structure, and effectively protecting the structure from damage. Moreover, the supports 4 arranged in an array on the outer surface of the outer support plate 101 of the upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3, as well as the square corrugated plates equidistantly arranged on each support 4, enhance the load-bearing capacity of the upper impact-resistant interlayer 1 and the lower impact-resistant interlayer 3, and can adapt to complex and variable stress environments. The intermediate circular tube impact-resistant layer 2 effectively absorbs radial impact loads through the deformation of the curved cross-section core layer 202, effectively protecting the internal structure from damage. Therefore, by combining the upper impact-resistant interlayer 1, the middle circular tube impact-resistant layer 2, the lower impact-resistant interlayer 3, and the support 4, the present invention obtains a lightweight, high-strength impact-resistant composite material structure, which effectively improves the impact resistance performance.

[0030] like Figure 5 As shown in the figure, finite element simulation reveals that under conditions of fixed bottom and vertical impact load, the overall deformation of this invention is relatively small. When subjected to external impact, it maintains good shape stability and overall rigidity, effectively resisting the deformation caused by external impact. Simultaneously, the stress level is relatively low; under impact load, the internal stress distribution is relatively uniform, and the stress peak is not high, reducing the risk of structural failure due to stress concentration.

[0031] The above description only illustrates the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention, and all such changes should be included within the protection scope of the present invention.

Claims

1. An impact-resistant composite material structure, comprising an upper impact-resistant interlayer and a lower impact-resistant interlayer, characterized in that: It also includes a middle circular tube impact-resistant layer and a support; the upper and lower impact-resistant interlayers have the same structure, each consisting of two support plates and a core layer structure fixed between the two support plates; the core layer structure consists of an arc-shaped panel and a flat panel; the arc-shaped panel consists of multiple corrugated plates integrally formed and sequentially connected along a straight line; the multiple arc-shaped panels are arranged at equal intervals, and in every two adjacent arc-shaped panels, the peak positions of the outermost arc-shaped panel are connected to the adjacent trough positions on the other arc-shaped panel through a flat panel; the two arc-shaped panels closest to the two support plates are respectively fixed to their corresponding support plates; The aforementioned intermediate circular tube impact-resistant layer consists of an outer circular tube, a curved cross-section core layer, and an inner circular tube. The curved cross-section core layer is composed of multiple corrugated plates integrally formed and connected sequentially end-to-end along the circumference. The crests and troughs of the curved cross-section core layer are fixedly connected to the outer and inner circular tubes, respectively. The upper and lower impact-resistant interlayers are arranged back-to-back, and multiple supports arranged in an array are fixed to the outer surface of the support plate of the upper and lower impact-resistant interlayers. The supports are composed of square corrugated plates and crossbeams. The two crossbeams are spaced apart and fixedly connected by multiple square corrugated plates arranged at equal intervals.

2. The impact-resistant composite material structure according to claim 1, characterized in that: The upper and lower impact-resistant interlayers are 20 mm thick, and the middle circular tube impact-resistant layer is 80 mm thick; the upper and lower impact-resistant interlayers are manufactured using 3D printing.

3. The impact-resistant composite material structure according to claim 1, characterized in that: The angle between the flat plate and the support plate is 45° to 60°, and the adjacent flat plates are arranged in a figure-eight or inverted figure-eight shape.

4. The impact-resistant composite material structure according to claim 1, characterized in that: The support plate and the curved plate are both made of aramid-reinforced resin-based composite material, while the flat plate is made of resin-based glass fiber composite material.

5. The impact-resistant composite material structure according to claim 1, characterized in that: The intermediate circular tube impact-resistant layer is made of carbon fiber reinforced resin matrix composite material. The outer and inner circular tubes are stacked with 0° fiber orientation along the thickness, and the core layer with curved cross-section is stacked in the following order along the thickness: [±45 / ±30 / ±15]. s .

6. The impact-resistant composite material structure according to claim 1, characterized in that: The outer circular tube has a diameter of 20–22 mm, and the inner circular tube has a diameter of 16–18 mm.

7. The impact-resistant composite material structure according to claim 1, characterized in that: The bracket is obtained by curing carbon fiber reinforced resin matrix composite material using a hot pressing process.

8. The impact-resistant composite material structure according to claim 1, characterized in that: The square corrugated plate has a square height of 20mm, a square width of 20mm, and a square thickness of 5mm; the spacing between adjacent square corrugated plates is 36mm.

9. The impact-resistant composite material structure according to claim 7, characterized in that: The carbon fiber to resin mass ratio of the carbon fiber reinforced resin matrix composite material is 1:1.5.

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