Stone-like tortoise shell impact-resistant protective structure and preparation method

Abstract

The application discloses a stone-like tortoise shell impact-resistant protective structure and a preparation method thereof. The structure comprises an upper layer, a middle layer and a lower layer which are sequentially stacked from top to bottom. The interfaces of the upper layer, the middle layer and the lower layer are sequentially connected with interface layers made of soft phase materials. The upper layer, the middle layer and the lower layer are respectively connected with a plurality of structural units. The connection mode between the structural units of the upper layer and the lower layer is that the interface structure is sinusoidal intercalation along the X direction and is overlapped in a tile-like manner along the Y direction. The connection mode between the structural units of the middle layer is opposite to that of the upper layer and the lower layer. The staggered layered structure has a tortuous crack propagation path when impacted. The sinusoidal intercalation interface and the tile-like overlapping structure can make the impact load realize energy dissipation along the transverse and longitudinal directions, effectively reduce stress concentration, realize reasonable distribution of impact energy, and significantly improve the impact resistance of the structure through the coupling effect of the two structures. The structure is lightweight, and the manufacturing and use costs are reduced.

Description

Technical Field

[0001] This invention relates to the field of biomimetic structural engineering technology, and in particular to a chiton shell-like impact-resistant protective structure and its preparation method. Background Technology

[0002] Impact-resistant protective structures have wide applications in aerospace, transportation, and military protection, such as aircraft engine blades, battery protective shells for electric vehicles, and bulletproof helmets. The requirements for the impact resistance of key components in these structures are gradually increasing. Impact-resistant protective structures absorb impact energy, protect the structure itself, and reduce damage to the structure.

[0003] However, most existing impact-resistant protective structures are of a single form and lack effective toughening mechanisms, which easily leads to stress concentration of impact loads inside the structure, poor transmission and diffusion of impact loads, and causes localized material damage. Impact-resistant protective structures are made of a single material, have limited impact resistance, and are also heavy.

[0004] Therefore, existing technologies still need further improvement and development. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a chiton shell-like impact-resistant protective structure and its preparation method. This invention provides a chiton shell-like impact-resistant protective structure that, while improving the impact resistance of the structure, achieves lightweighting and reduces manufacturing and usage costs.

[0006] The technical solution of the present invention is as follows:

[0007] A chiton shell-like impact-resistant protective structure includes: an upper layer, a middle layer, and a lower layer stacked sequentially from top to bottom; the surfaces connecting the upper, middle, and lower layers are configured as interface layers made of a soft phase material.

[0008] The upper, middle, and lower layers are each composed of multiple structural units connected sequentially. The structural units are separated by an interface layer made of soft phase material, and the structural units are structural units made of hard phase material.

[0009] The connection between the upper and lower structural units is such that the interface structure is a sinusoidal curve-shaped interlocking structure along the X direction and an overlapping structure in a tile-like manner along the Y direction; the connection between the middle structural units is such that the interface structure is a sinusoidal curve-shaped interlocking structure along the X direction and an overlapping structure in a tile-like manner along the Y direction.

[0010] The aforementioned chiton shell-like impact-resistant protective structure, wherein the connection between the structural units adopts a sinusoidal interlocking interface structure along the X direction, mimicking the chiton shell.

[0011] The aforementioned chiton shell-like impact-resistant protective structure, wherein the connection method between the structural units along the Y direction adopts a cross-layered, overlapping structure that mimics the chiton shell.

[0012] The aforementioned chiton shell-like impact-resistant protective structure, wherein the upper, middle, and lower layers are rotated by a predetermined angle layer by layer.

[0013] The aforementioned chiton shell-like impact-resistant protective structure, wherein the predetermined angle is 90 degrees, the middle layer is rotated 90 degrees counterclockwise around the central axis relative to the upper layer, and the lower layer is rotated 90 degrees counterclockwise relative to the middle layer.

[0014] The aforementioned chiton shell-like impact-resistant protective structure, wherein the angle between the tilt direction of the structural unit and the horizontal plane is 30° to 60°.

[0015] In the aforementioned chiton shell-like impact-resistant protective structure, the amplitude of the sine curve is 0.3–1 mm, and the period is 1–3 mm.

[0016] The aforementioned chiton shell-like impact-resistant protective structure has the same dimensions for its upper, middle, and lower layers; the length, width, and height of each structural unit are 1–5 mm.

[0017] The aforementioned chiton shell-like impact-resistant protective structure, wherein the thickness of the interface layer prepared by the soft phase material is 0.1–0.4 mm; and the volume percentage of the hard phase material is 60%–90%.

[0018] The ratio of the elastic modulus of the hard phase to the soft phase material is 500 to 2000.

[0019] A method for preparing a chiton shell-like impact-resistant protective structure as described in any of the preceding claims, comprising the steps of:

[0020] Structural units of ceramic materials are prepared using direct ink writing 3D printing technology. The structural units are arranged in a pre-set mold of a chiton shell-like impact-resistant protective structure according to the designed structure. Epoxy resin is added and the structure is formed under predetermined temperature and pressure to prepare a chiton shell-like impact-resistant structure.

[0021] Based on biomimetic principles, this invention provides a novel chiton-shell-inspired impact-resistant protective structure and its fabrication method, utilizing the interlaced layered structure and sinusoidal interlocking interface structure of chiton shells. This chiton-shell-inspired impact-resistant protective structure exhibits a tortuous crack propagation path upon impact, with the interlayer interfaces possessing crack stabilization and crack bifurcation toughening mechanisms. The sinusoidal interlocking interface structure and the overlapping, tile-like structure enable energy dissipation of impact loads along both the transverse and longitudinal directions, effectively reducing stress concentration and achieving a rational distribution of impact energy. Furthermore, the coupling effect of the interlaced layered structure and the interlocking interface structure introduces a mineral-like bridging toughening mechanism, enhancing the structure's impact resistance. The structure is 3D printed using two materials, with a rigid-flexible material configuration that combines strength and toughness. While improving the structure's impact resistance, it also achieves lightweight construction, reducing manufacturing and usage costs. Attached Figure Description

[0022] Figure 1 Microscopic image of the interlaced layered structure of the Korean Scaled Chiton under a scanning electron microscope.

[0023] Figure 2 Microscopic image of the interlocking interface structure of the Korean scaly chiton under a scanning electron microscope.

[0024] Figure 3 This is a schematic diagram of a chiton shell-like impact-resistant protective structure.

[0025] Figure 4 for Figure 3 A magnified view of the area marked "A" in the impact-resistant protective structure of the chiton shell.

[0026] Figure 5 This is a schematic diagram of the internal structure of a single layer.

[0027] Figure 6 This is a schematic diagram of a structural unit with a sinusoidal interlocking interface in a chiton shell-like impact-resistant structure.

[0028] Figure 7 This is a schematic diagram of a non-interlocking interface impact-resistant structure.

[0029] Figure 8 This is a comparison diagram of the impact force displacement curves of the chiton shell-like impact-resistant structure and the non-interlocking interface structure in Example 1.

[0030] Figure 9 This is a comparison diagram of the impact energy absorption of the chiton shell-like impact-resistant structure and the non-interlocking interface structure in Example 1.

[0031] Figure 10 A schematic diagram of the layered rotating structure around the central axis of the chiton shell-like impact-resistant protective structure. Detailed Implementation

[0032] This invention provides a chiton shell-like impact-resistant protective structure and its preparation method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0034] Millions of years of survival competition in nature have driven biological evolution to develop impact-resistant natural materials. Mimicking the structural features of organisms and understanding the mechanisms between their structure and properties will help in designing lightweight, impact-resistant protective composite materials. The chiton, with its tough shell, has survived on Earth for hundreds of millions of years. For example... Figure 1 As shown, the chiton's shell has a cross-layered structure. The strength of this cross-layered structure is basically the same as the "brick-and-mortar" structure of nacre, but its toughness is several times greater. Furthermore, as... Figure 2 As shown, chiton shells have an interlocking interface structure at the submicron scale, which can improve the load transfer efficiency between adjacent structural units and effectively diffuse impact loads to a larger range. This stress homogenization effect can significantly reduce stress concentration.

[0035] Therefore, the chiton shell-like impact-resistant protective structure of the present invention, which mimics the cross-layered structure and interlocking interface structure of the chiton shell, can provide important ideas for the design of high-performance impact-resistant protective structures. Inspired by the impact resistance of chiton shells, this application discloses a chiton shell-like impact-resistant protective structure and its preparation method.

[0036] like Figure 3 and Figure 4 As shown, this invention discloses an impact-resistant protective structure mimicking a chiton shell. The structure consists of an upper layer 10, a middle layer 20, and a lower layer 30 stacked sequentially from top to bottom, with each layer rotated 90°.

[0037] In this embodiment of the invention, the upper, middle, and lower layers are each composed of multiple structural units connected sequentially. Specifically, the upper layer is composed of multiple structural units connected sequentially, the middle layer is composed of multiple structural units connected sequentially, and the lower layer is composed of multiple structural units connected sequentially. The connection method between the structural units of the upper layer 10 and the lower layer 30 is a sinusoidal, interlocking interface structure along the X-direction, such as... Figure 6The diagram shows the connection of structural units with sinusoidal interlocking interfaces in the chiton shell-like impact-resistant structure of the present invention, and the connection method between the structural units is an overlapping, tile-like structure along the Y direction, as shown below. Figure 5 The structure shown exhibits a tile-like overlapping pattern along the Y direction and a sinusoidal interlocking interface structure along the X direction. Thus, the connection between the structural units of the upper layer 10 and the lower layer 30 is a sinusoidal interlocking interface structure along the X direction and a tile-like overlapping pattern along the Y direction.

[0038] The connection method between structural units along the X-direction adopts a sinusoidal interlocking interface structure, mimicking the interlocking interface structure of a chiton shell. This improves the load transfer efficiency between adjacent structural units, effectively dispersing impact loads over a wider area. Conversely, the connection method between structural units along the Y-direction adopts a cross-layered, overlapping, imitative structure, mimicking a chiton shell. This homogenizes stress, reduces stress concentration, and improves the strength and toughness of the structure.

[0039] The connection method between the structural units of the middle layer 20 is the opposite of that of the upper layer 10 and the lower layer 30. That is, the connection method between the structural units of the middle layer is a sinusoidal interlocking interface structure along the Y direction and an overlapping in a tile-like manner along the X direction. Based on the principles of bionics, this invention provides a novel bionic impact-resistant protective structure based on the chiton shell-like interlocking layered structure and the sinusoidal interlocking interface structure. When subjected to impact, the structure has a tortuous crack propagation path, and the interlayer interface has a toughening mechanism of crack stabilization and crack bifurcation. The sinusoidal interlocking interface structure and the overlapping in a tile-like manner can dissipate the impact load along the lateral and longitudinal directions, playing a significant role in stress homogenization, effectively reducing stress concentration, realizing a reasonable distribution of impact energy, and improving the impact resistance of the structure.

[0040] Please refer to the accompanying drawings. A specific embodiment of the present invention provides a chiton shell-like impact-resistant protective structure. This impact-resistant structure is composed of two materials: a hard phase and a soft phase. The hard phase material simulates inorganic matter, while the soft phase material simulates organic matter. In this embodiment, the surfaces connecting the upper, middle, and lower layers are set as interface layers made of the soft phase material. The structural units are separated by interface layers made of the soft phase material, and the structural units themselves are made of the hard phase material. This provides both impact resistance and cushioning. The chiton shell-like impact-resistant protective structure in this embodiment is 3D printed using both materials. The rigid-flexible material configuration combines strength and toughness, achieving lightweight construction and reducing manufacturing and usage costs while improving the structure's impact resistance.

[0041] As can be seen from the above, the chiton-shell-like impact-resistant protective structure provided in this embodiment of the invention consists of at least three layers. When it is a three-layer structure, it includes an upper layer 10, a middle layer 20, and a lower layer 30 stacked sequentially from top to bottom. In this embodiment of the invention, the upper layer 10, the middle layer 20, and the lower layer 30 are rotated 90° layer by layer, as shown below. Figure 10 As shown, the middle layer is rotated 90 degrees counterclockwise relative to the upper layer around the central axis. The lower layer is also rotated 90 degrees counterclockwise relative to the middle layer. This structure can cause crack deflection, significantly lengthening the crack propagation path and thus improving the toughness of the material.

[0042] The upper layer 10, the middle layer 20, and the lower layer 30 are connected by a soft phase material, that is, connected by an interface layer made of a soft phase material. For example... Figure 5 As shown, the interior of a single layer is composed of structural units at a 45° angle to the horizontal direction; among them, the upper layer 10 and the lower layer 30, along the X direction, have adjacent structural units that intersect at 90°, and the adjacent structural units are joined together by a sinusoidal interlocking interface structure 3 (e.g., Figure 4 (As shown); along the Y direction, adjacent structural units overlap in a tile-like manner. The present invention employs a single layer composed of structural units at a 45° angle to the horizontal direction, and along the X direction, adjacent structural units intersect at a 90° angle; this angle can significantly increase crack deflection, lengthen the crack propagation path, and fully utilize the role of mineral bridging and toughening mechanisms to enhance the toughness and damage resistance of the chiton shell-like impact-resistant protective structure.

[0043] The middle layer 20 has an overlapping, tile-like structure along the X direction and an interlocking, sinusoidal interface structure along the Y direction.

[0044] like Figure 4 As shown, the chiton-shell-like impact-resistant protective structure of this invention is made of two materials, including a structural unit 1 made of a hard phase material and interface layers 2 and 3 made of a soft phase material. This chiton-shell-like impact-resistant protective structure of this invention has excellent impact resistance and the ability to absorb impact energy.

[0045] Preferably, in an embodiment of the present invention, a chiton-like shell-inspired impact-resistant protective structure is provided, wherein the biomimetic object of the impact-resistant structure is selected from chitons, such as a scaly chiton from the intertidal zone of a certain island.

[0046] Preferably, in the chiton shell-like impact-resistant protective structure of this embodiment of the invention, the volume percentage of the hard phase material is 60% to 90%. This ratio can achieve the best balance between the strength and toughness of the chiton shell-like impact-resistant protective structure.

[0047] Preferably, in the chiton-shell-like impact-resistant protective structure of this embodiment of the invention, the ratio of the elastic modulus of the hard phase to the soft phase is 500 to 2000. This ratio can fully utilize the reinforcing effect of the hard phase and the toughening effect of the soft phase, achieving a match between the mechanical properties of the two materials and fully leveraging the advantages of both materials.

[0048] Preferably, in an embodiment of the present invention, a chiton-shell-like impact-resistant protective structure is provided, wherein the structural unit is made of a hard phase material, and the length, width, and height of the structural unit are all 1–5 mm, more preferably 3 mm × 3 mm × 3 mm. This structural unit size enables effective load transfer, dissipating impact energy over a wider area, thereby significantly reducing stress concentration within the structural unit.

[0049] Preferably, in the chiton-shell-like impact-resistant protective structure of this embodiment of the invention, the thickness of the interface layer prepared by the soft phase material is 0.1–0.4 mm. This range of values ​​can maximize the toughening effect of the interface layer, guide crack deflection, and at the same time ensure the connection between structural units and the integrity of the chiton-shell-like impact-resistant protective structure.

[0050] Preferably, in an embodiment of the present invention, a chiton shell-like impact-resistant protective structure is provided, wherein the sinusoidal interlocking interface 3 has an amplitude of 0.3–1 mm and a period of 1–3 mm. This range of amplitude and period ensures that the chiton shell-like impact-resistant protective structure achieves optimal toughness while improving its strength. Excessive amplitude and period will significantly reduce the toughness of the structure, while insufficient amplitude and period will fail to effectively improve its strength, toughness, and damage resistance.

[0051] Preferably, in an embodiment of the present invention, the chiton-shell-like impact-resistant protective structure has a structural unit whose tilt direction forms an angle of 30° to 60° with the horizontal plane. This angle range can significantly increase crack deflection, lengthen the crack propagation path, and fully utilize the mineral bridging and strengthening mechanism, thereby enhancing the toughness and damage resistance of the chiton-shell-like impact-resistant protective structure.

[0052] An impact-resistant protective structure mimicking a chiton shell, according to an embodiment of the present invention, is prepared using an additive manufacturing method.

[0053] The additive manufacturing method includes using photopolymerization 3D printing to prepare a soft polymer scaffold, then immersing the polymer scaffold in a bacterial culture medium to allow the bacteria to attach to the polymer surface, and finally immersing the polymer scaffold in a solution containing calcium ions and urea. The bacteria will decompose the urea to produce carbonate ions, which will react with the calcium ions to form calcium carbonate, which will fill the gaps in the polymer scaffold.

[0054] The additive manufacturing method includes integral molding using photopolymerization 3D printing to prepare an impact-resistant structure that mimics the shell of a chiton.

[0055] Alternatively, the preparation method employs direct ink writing 3D printing technology to prepare structural units of ceramic materials. The structural units are arranged in a mold according to the designed structure, epoxy resin is added, and the mold is formed under a predetermined temperature and pressure to prepare an impact-resistant structure that mimics a chiton shell.

[0056] In practice, a three-dimensional solid geometric model of the biomimetic impact-resistant structure is constructed using CAD, and STL format data is exported. The structure is then sliced ​​into layers using software.

[0057] Import the slice data into the UV curing 3D printer, add photosensitive resin, and use a computer-controlled UV beam to selectively cure the photosensitive resin layer by layer until printing is complete. Then clean the print and place it in a UV curing chamber for further curing.

[0058] The additive manufacturing technologies used include, but are not limited to, photopolymerization, fused deposition modeling, selective laser melting, and direct ink writing.

[0059] The preparation method of the chiton shell-like impact-resistant protective structure in this embodiment of the invention is as follows:

[0060] Specific application example 1:

[0061] (1) In this embodiment 1, a three-dimensional geometric model of the chiton shell-like impact-resistant structure is constructed using CATIA software (a drafting software). For example... Figure 3 and Figure 4 As shown, the chiton shell-like impact-resistant protective structure of this embodiment consists of an upper layer 10, a middle layer 20, and a lower layer 30 stacked sequentially from top to bottom. The upper layer 10, middle layer 20, and lower layer 30 are rotated 90° around the Z-axis layer by layer, as shown. Figure 10 As shown, the overall dimensions of the model are 70mm in length, 70mm in width, and 9.6mm in thickness. The thickness of a single layer is 3mm, the thickness of the soft phase material between layers is 0.3mm, and the dimensions of the structural unit are 3mm × 3mm × 3mm. Figure 6 The structure features sinusoidal interlocking interfaces with an amplitude of 0.3 mm and a period of 2 mm. The distance between two adjacent structural units is 0.3 mm, and the angle between the axis of the structural unit and the horizontal plane is 45°. The upper structural units are connected along the X-axis by interlocking interfaces and overlap in a tile-like manner along the Y-direction. After the design was completed, the structure was sliced ​​using the 3D printing model processing software Materialise Magics, with a slice thickness of 16 μm.

[0062] (2) Pour the prepared photosensitive resins VeroWhitePlus and Agilus into the resin tank, import the slice data into a UV curing 3D printer that can simultaneously spray multiple basic materials, set the exposure time to 1 second, and start printing.

[0063] (3) After printing, clean with ethanol for 40 seconds and cure in a UV curing oven for 350 seconds;

[0064] (4) The impact-resistant structure of the above-prepared chiton shell was tested using a drop hammer impact testing machine (CEAST9350, INSTRON). Figure 7 The impact-resistant structure with the non-interlocking interface shown was tested, and the force-displacement curves are as follows. Figure 8 As shown, the chiton-shell-like impact-resistant structure can withstand higher impact loads, and its impact resistance is increased by 17.8% compared to the non-interlocking layered structure. The impact energy absorption results are as follows. Figure 9 As shown, the energy absorption of the chiton shell-like impact-resistant structure is improved by 52.4% compared with the non-interlocking layered structure;

[0065] (5) The above-mentioned chiton shell-like impact-resistant structure was simulated and analyzed using the LS-DYNA program. The simulation results were basically consistent with the drop hammer impact test. The strength and toughness mechanism and internal causes of failure of the structure were further analyzed through the simulation results.

[0066] Specific application example 2:

[0067] The impact-resistant chiton shell structure prepared in Example 2 has the same dimensions as that in Example 1, but the preparation method and materials used in Example 2 differ from those in Example 1. Preferably, ceramic material is used in Example 2, and the specific preparation method is as follows:

[0068] (1) Using direct ink writing 3D printing technology, alumina ceramic slurry is used as raw material to prepare the structural unit of the imitation chiton shell impact-resistant structure, and a ceramic preform with sinusoidal interlocking interface is obtained.

[0069] (2) The ceramic body is cleaned, repaired, and dried. The drying method used is to dry at room temperature for 24 hours, and then at 120°C for 1 hour;

[0070] (3) Heat the ceramic body to 600°C and keep it at that temperature for 2 hours to burn off the organic matter in the ceramic body. Continue to heat the ceramic body to densify its internal structure and obtain a ceramic component.

[0071] (4) Arrange the ceramic components in the mold according to the structural form of the imitation chiton shell impact-resistant structure, and then pour the prepared epoxy resin liquid into the mold after stirring evenly. Preferably, the epoxy resin liquid is prepared according to the mass ratio of epoxy resin: curing agent: diluent = 10:2:1.

[0072] (5) The epoxy resin liquid that has penetrated into the gap between each adjacent ceramic component is cured at a set temperature and pressure. Preferably, the curing temperature is 60°C for 2 hours and 140°C for 2 hours, and the curing pressure is 5MPa, to obtain the imitation chiton shell impact-resistant structure.

[0073] In summary, the beneficial effects of this invention are as follows: Based on the principles of bionics, this invention draws inspiration from the interlaced layered structure of chiton shells and the sinusoidal interlocking interface structure to design a novel bionic impact-resistant protective structure. The interlaced layered structure can guide crack deflection, and this tortuous crack path can dissipate more impact energy. Impact causes microcracks to form inside the structure, which can absorb a large amount of energy. At the same time, the interfaces between the layers have a toughening mechanism of crack stabilization and crack bifurcation.

[0074] The interlocking interface structure enhances the connection between structural units, allowing the load transfer between structural units to be jointly borne by the hard and soft phases. This effectively transmits impact loads over a wider range, achieving stress homogenization and effectively solving the problems of poor impact resistance and stress concentration in traditional impact-resistant structures.

[0075] The chiton shell-like impact-resistant structure described in this invention has a complex structure and is integrally formed using multi-material 3D printing technology, which can achieve the required precision and quality. This composite material achieves rigid-flexible coupling, and achieves lightweight structure while significantly improving impact resistance.

[0076] The chiton shell-like impact-resistant structure described in this invention can be prepared using different materials (such as ceramics, metals, polymers, etc.), and has universal applicability.

[0077] The biomimetic impact-resistant protective structure significantly improves impact resistance and has broad application prospects in aerospace, rail transportation, bulletproofing and other fields.

[0078] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A chiton shell-like impact-resistant protective structure, characterized in that, include: The upper layer is arranged in layers from top to bottom. The upper, middle, and lower layers are connected sequentially by an interface layer made of a soft phase material. The upper, middle and lower layers are each composed of multiple structural units connected in sequence, and the structural units are structural units made of hard phase materials. The connection between the upper and lower structural units is as follows: along the X direction, a sinusoidal interlocking interface structure mimicking a chiton shell is adopted, and along the Y direction, a tile-like overlapping structure mimicking a chiton shell is adopted; the connection between the middle structural units is as follows: along the Y direction, a sinusoidal interlocking interface structure is adopted, and along the X direction, a tile-like overlapping structure is adopted.

2. The chiton shell-like impact-resistant protective structure according to claim 1, characterized in that, The upper layer, middle layer and lower layer Rotate each layer by a predetermined angle.

3. The chiton shell-like impact-resistant protective structure according to claim 2, characterized in that, The predetermined angle is 90 degrees. The middle layer is rotated 90 degrees counterclockwise relative to the upper layer around the central axis, and the lower layer is rotated 90 degrees counterclockwise relative to the middle layer.

4. The chiton shell-like impact-resistant protective structure according to claim 1, characterized in that, The tilt of the structural unit The angle between the direction and the horizontal plane is 30° to 60°.

5. The chiton shell-like impact-resistant protective structure according to claim 1, characterized in that, The amplitude of the sine curve The diameter is 0.3-1 mm, and the period is 1-3 mm.

6. The chiton shell-like impact-resistant protective structure according to claim 1, characterized in that, The upper layer, middle layer and lower layer The layers are all the same size; the length, width and height of the structural unit are all 1 to 5 mm.

7. The chiton shell-like impact-resistant protective structure according to claim 1, characterized in that, The soft phase material is prepared The thickness of the interface layer is 0.1–0.4 mm; the volume percentage of the hard phase material is 60%–90%. The ratio of the elastic modulus of the hard phase to the soft phase material is 500 to 2000.

8. A method for preparing a chiton shell-like impact-resistant protective structure as described in any one of claims 1-7, characterized in that... The process includes the following steps: Structural units of ceramic materials are prepared using direct ink writing 3D printing technology, and these units are then arranged according to the designed structure. Arranged within a pre-set mold of an impact-resistant chiton shell structure, epoxy resin is added, and the mixture is heated to a predetermined temperature. Under pressure, an impact-resistant structure similar to a chiton shell is produced.

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