Helical impact-resistant structure with biomimetic gradient sinusoidal wave walls and method of manufacture

Abstract

The application discloses a spiral impact-resistant structure with a biomimetic gradient sinusoidal wave wall and a preparation method thereof, and comprises at least two porous structure layers; each porous structure layer comprises an upper layer plate, a lower layer plate and a biomimetic gradient sinusoidal wave wall arranged between the upper layer plate and the lower layer plate; wherein the upper layer plate and the lower layer plate are arranged in parallel respectively; the biomimetic gradient sinusoidal wave wall is perpendicular to the upper layer plate and the lower layer plate respectively, and is arranged in an equal interval along a length direction inside the upper layer plate and the lower layer plate, is arranged in parallel along a width direction, and along a height direction, the amplitude and the period of the sinusoidal curve type wave wall are gradiently changed respectively; each biomimetic gradient sinusoidal wave wall is a biomimetic gradient sinusoidal wave wall imitating a gradient of an octopus bone. The structure of the application has excellent impact resistance while realizing light weight, thereby improving the safety of the protected person and the vehicle.

Description

Technical Field

[0001] This invention relates to the field of biomimetic impact-absorbing technology, and in particular to an impact-absorbing plate or automotive component based on cuttlebone and its preparation method. Background Technology

[0002] Impact-resistant protective structures have wide applications in the automotive, aerospace, and military protection fields. In the transportation sector, high-speed impacts pose more frequent and direct hazards, and due to the increased speed of vehicles, the consequences of collisions are more severe, thus placing higher demands on impact-resistant protective structures. Porous structural materials, with their lightweight, high strength, and impact energy absorption properties, have been widely used in transportation and other fields. However, existing porous impact-resistant energy-absorbing structures often lack design flexibility, resulting in current impact-resistant components that are still not ideal in terms of resisting damage and buffering energy absorption.

[0003] Therefore, existing technologies still need further improvement and development. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall and its preparation method. This invention achieves lightweighting while having excellent impact resistance, thereby improving the safety of the protected person and vehicle.

[0005] The technical solution of the present invention is as follows:

[0006] A helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, comprising:

[0007] At least two porous structural layers;

[0008] Each porous structure layer includes an upper plate, a lower plate, and a biomimetic gradient sinusoidal wave wall disposed between the upper plate and the lower plate;

[0009] The upper plate and the lower plate are arranged in parallel.

[0010] The biomimetic gradient sinusoidal wave walls are perpendicular to the upper plate and the lower plate, respectively. They are arranged at equal intervals along the length direction and parallel along the width direction inside the space between the upper plate and the lower plate. The amplitude and period of the sinusoidal wave walls change gradient along the height direction.

[0011] Each of the aforementioned biomimetic gradient sinusoidal wave walls is a biomimetic gradient sinusoidal wave wall that mimics the cuttlebone gradient.

[0012] The aforementioned helical impact-resistant structure with biomimetic gradient sinusoidal wave walls has a vertical arrangement with an angle difference between adjacent porous structural layers, and is arranged in an interlayer stacking manner that imitates the spiral arrangement of a mantis shrimp.

[0013] The aforementioned helical impact-resistant structure with biomimetic gradient sinusoidal wave walls, wherein,

[0014] The upper and lower wave-shaped sections of the sinusoidal wave wall have a non-linear transition.

[0015] The aforementioned helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall has different periods and amplitudes for the upper and lower sinusoidal curves. The amplitudes and periods of the upper and lower sinusoidal curves change nonlinearly along the height direction, with the rate of change at the bottom being greater than that at the top.

[0016] The aforementioned helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, wherein the amplitude and period of the biomimetic gradient sinusoidal wave wall change at a rate along the height direction according to a sine curve, and its contour line satisfies the following equation:

[0017]

[0018] in, A 1 represents the amplitude at the bottom of the wave wall. K 1 represents the period at the bottom of the wave wall. A 2 represents the amplitude at the top of the wave wall. K 2 represents the period at the top of the wave wall. H It is the height of the wave wall. h It is the height value at any height of the wave wall. h ∈[0, H ]).

[0019] The aforementioned helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, wherein the biomimetic gradient sinusoidal wave wall varies according to the gradient changes of the amplitude and period of a sinusoidal curve, where A1 is the amplitude at the bottom of the wave wall, K1 is the period at the bottom of the wave wall, A2 is the amplitude at the top of the wave wall, and K2 is the period at the top of the wave wall, is divided into 4 different structural design schemes:

[0020] The first option is... A 1> A 2, K 1> K 2;

[0021] The second option is... A 1> A 2, K 1< K 2;

[0022] The third option is... A 1< A 2, K 1> K 2;

[0023] The fourth option is A 1< A 2, K 1< K 2;

[0024] In the first option, A 1 is A 2 to 5 times 2 K 1 is K 2 to 5 times 2;

[0025] In the second option, A 1 is A 2 to 5 times 2 K 2 is K 2 to 5 times that of 1;

[0026] In the third option A 2 is 2 to 5 times that of A1. K 1 is K 2 to 5 times 2;

[0027] In the fourth option, A 2 is A 2 to 5 times that of 1 K 2 is K 1 is 2 to 5 times that of 1.

[0028] The aforementioned helical impact-resistant structure with biomimetic gradient sinusoidal wave walls comprises an upper and lower plate, both 60mm in length and width, and 0.3mm in thickness. The biomimetic gradient sinusoidal wave walls have a height of 10mm and a spacing of 4mm. A 1 is 0.3mm. A 2 is 1mm. K 1 is 12mm. K 2 is 60mm; where A1 is the amplitude at the bottom of the wave wall, K1 is the period at the bottom of the wave wall, A2 is the amplitude at the top of the wave wall, and K2 is the period at the top of the wave wall.

[0029] The aforementioned helical impact-resistant structure with biomimetic gradient sinusoidal wave walls, wherein the upper and lower plates are planar or curved surfaces; the porosity of the helical impact-resistant structure with biomimetic gradient sinusoidal wave walls is 50%-90%.

[0030] The aforementioned helical impact-resistant structure with biomimetic gradient sinusoidal wave walls, wherein the rotation angle between adjacent porous structural layers of the biomimetic gradient sinusoidal wave walls... β It can be 90 degrees, 45 degrees, or 0 degrees.

[0031] A method for preparing a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall as described in any of the preceding claims, comprising the steps of:

[0032] S11. Import the preparation functions of the upper plate, lower plate, and the biomimetic gradient sinusoidal wave wall into the modeling software, and use the drawing software to construct a three-dimensional geometric model of the biomimetic impact-resistant structure; when the three-dimensional geometric model is completed, use 3D printing model processing software to slice the structure.

[0033] S12. Pour the prepared photosensitive resin and flexible resin material into the resin tank, import the above slicing data into the UV curing 3D printer that can spray multiple basic materials at the same time, set the exposure time, and start printing; and use the computer to control the UV beam to selectively cure the photosensitive resin layer by layer.

[0034] S13. After 3D printing is completed, the material is cleaned and placed in an ultraviolet curing chamber for curing to complete the preparation of the helical impact-resistant structure with biomimetic gradient sinusoidal wave wall.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] This invention provides a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall and its fabrication method. Utilizing biomimetic principles, this invention applies the cuttlebone gradient sinusoidal impact-resistant structure and the helical structure of a mantis shrimp to a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall. The gradient variation of amplitude and period along the height direction of this biomimetic impact-resistant structure can significantly improve its impact resistance and energy absorption capacity. Furthermore, the nonlinear variation of amplitude and period along the height direction can reduce the impact force at the moment of impact, providing excellent buffering and energy absorption. This results in the impact strength of the biomimetic impact-resistant structure gradually increasing with the impact displacement, exhibiting impact hardening. The helical arrangement of this biomimetic impact-resistant structure further enhances its impact resistance, thereby achieving structural lightweighting and reducing manufacturing and usage costs while fully ensuring the safety of the protected object. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, according to an embodiment of the present invention.

[0038] Figure 2This is a schematic diagram of different design schemes of a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, according to an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of a single-layer biomimetic gradient sinusoidal wave wall impact-resistant structure with a biomimetic gradient sinusoidal wave wall, according to an embodiment of the present invention.

[0040] Figure 4 This invention provides a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, as an embodiment of the present invention. β =0° structural diagram.

[0041] Figure 5 This invention provides a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, as an embodiment of the present invention. β =90° structural diagram.

[0042] Figure 6 The biomimetic gradient sinusoidal wave wall helical impact-resistant structure of this invention is an embodiment of the present invention. β =45°).

[0043] Explanation of reference numerals in the attached diagram: 1. Upper plate; 2. Bionic gradient sinusoidal wave wall; 3. Lower plate. Detailed Implementation

[0044] This invention provides a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall 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.

[0045] It will be understood in this technical field that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the word “comprising” as used in this specification means the presence of the stated features, integers, or steps, but does not exclude the presence or addition of one or more other features.

[0046] It will be understood in this technical field that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0047] In specific implementation, such as Figure 4As shown, an embodiment of the present invention provides a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, comprising at least two porous structural layers 100. For example... Figure 3 As shown, each porous structure layer 100 includes an upper plate 1, a lower plate 3, and a plurality of biomimetic gradient sinusoidal wave walls 2 disposed between the upper plate 1 and the lower plate 3; the plurality of biomimetic gradient sinusoidal wave walls 2 are arranged in parallel at intervals and perpendicular to the upper plate 1 and the lower plate 3.

[0048] In this configuration, the upper plate 1 and the lower plate 3 are arranged in parallel. The biomimetic gradient sinusoidal wave wall 2 is perpendicular to both the upper plate 1 and the lower plate 3. Within the space between the upper plate 1 and the lower plate 3, the wave walls are arranged at equal intervals along the length direction and parallel along the width direction. Along the height direction, the amplitude and period of the sinusoidal wave wall vary with gradients. For example... Figure 1 and Figure 2 As shown, the biomimetic gradient sinusoidal wave wall in this embodiment refers to a wave-shaped wall with a sinusoidal curve in shape, and its amplitude and period change with position (gradient change).

[0049] The biomimetic gradient sinusoidal wave wall 2 is perpendicular to the upper plate 1 and the lower plate 3 respectively, meaning that the biomimetic gradient sinusoidal wave wall 2 is placed perpendicular to the two planar plates (upper plate 1 and lower plate 3), and the direction of the biomimetic gradient sinusoidal wave wall 2 is vertical.

[0050] In this embodiment of the invention, the biomimetic gradient sinusoidal wave walls 2 are arranged at equal intervals along the length direction inside the space between the upper and lower plates, which means that the biomimetic gradient sinusoidal wave walls 2 are uniformly distributed along the length direction, and the distance between each wave wall is equal.

[0051] The parallel arrangement along the width direction means that these biomimetic gradient sinusoidal wave walls 2 are placed parallel in the width direction, forming an integral structure.

[0052] In this invention, the amplitude and period of the sinusoidal wave walls vary gradients along the height direction. This means that the shape of these wave walls is not fixed in the vertical direction, but changes with the height. For example, the wave crests may be higher (larger amplitude) in some places, and the wave undulation frequency (period) may also vary with the height.

[0053] As can be seen from the above, the advantage of the biomimetic gradient sinusoidal wave wall 2 described in this invention is that it can help distribute the pressure load in different directions, which helps to improve the stability and durability of the overall structure, and can reduce the instantaneous impact force on passengers.

[0054] In this embodiment, as Figure 1As shown, each of the biomimetic gradient sinusoidal wave walls 2 is a biomimetic gradient sinusoidal wave wall 2 that mimics the gradient of cuttlefish bone; wherein, the cuttlefish bone structure has specific gradient characteristics, manifested as the distribution of hardness, flexibility, or other mechanical properties, such as... Figure 1 As shown, the shape of these wave walls is not fixed in the vertical direction, but changes with height. For example, the wave crests may be higher (larger amplitude) in some places, and the wave undulation frequency (period) may also vary with height. The sinusoidal wave wall of this invention refers to a wall structure whose shape exhibits sinusoidal wave characteristics. This design can improve the mechanical properties of the material, such as enhancing its resistance to bending and impact. Therefore, the biomimetic gradient sinusoidal wave wall 2 of this invention, which mimics the cuttlebone gradient, combines the sinusoidal wave shape characteristic of cuttlebone gradients and can provide superior mechanical properties. By mimicking the gradient characteristics of cuttlebone, it can reduce weight, improve strength and durability.

[0055] Furthermore, in this embodiment of the invention, the biomimetic gradient sinusoidal wave walls 2 between adjacent porous structure layers 100 are arranged vertically with an angular difference, and are arranged in an interlayer stacking manner that mimics the spiral arrangement of a mantis shrimp, such as... Figure 4 , Figure 5 and Figure 6 As shown, the biomimetic gradient sinusoidal wave walls 2 between adjacent porous structure layers 100 are arranged at an angle, meaning that the biomimetic gradient sinusoidal wave walls 2 between adjacent porous structure layers 100 are not vertically aligned, but rather arranged at a certain angle. This design can enhance the stability and impact resistance of the material.

[0056] The invention employs a layered stacking method mimicking the spiral arrangement of a mantis shrimp. Specifically, the mantis shrimp, a creature renowned for its powerful vision and aggressive capabilities, draws inspiration from the structural features of its exoskeleton. The "spiral arrangement" in this invention means that the layers are not simply stacked vertically, but rather arranged in a spiral pattern. This structural design optimizes material properties and enhances overall mechanical properties, such as compressive and torsional resistance. Therefore, the biomimetic gradient sinusoidal wave walls between adjacent porous structural layers in this embodiment of the invention, using a vertical arrangement with angular differences and a spiral layered stacking method, are expected to achieve superior mechanical properties and application effects.

[0057] In more specific embodiments, such as Figure 1 and Figure 2As shown, the present invention features a nonlinear transition between the upper and lower wave-shaped sections of the sinusoidal wave wall. This nonlinear transition means that the shape change from the upper to the lower section is not linear (uniform), but rather exhibits a complex process. Specifically, the wave shape changes more complexly in the height direction, potentially accelerating or decelerating gradually, rather than being a series of uniform curves. This nonlinear variation can regulate the changes in compressive stress during compression, preventing sudden structural collapse and reducing the instantaneous impact force on passengers.

[0058] like Figure 1 As shown, the period and amplitude of the upper and lower sine curves of the gradient sinusoidal wave wall are different. The amplitude and period of the upper and lower sine curves change nonlinearly along the height direction, and the rate of change at the bottom is greater than that at the top.

[0059] The upper and lower sine curves differ in period and amplitude. Period refers to the length of a complete ripple, meaning the wave shapes at the upper and lower ends differ in frequency (i.e., the frequency of high and low undulations). Amplitude refers to the height of the wave, the vertical distance from crest to trough, representing the intensity of the wave. The difference in amplitude between the upper and lower ends indicates that their wave intensity varies at different heights.

[0060] In this embodiment of the invention, the amplitude and period of the sinusoidal curve of the gradient sinusoidal wave wall change nonlinearly along the height direction. This means that, from top to bottom, the height (amplitude) and period of the wave are not a simple linear relationship, but a complex nonlinear change. This implies that within a certain height range, the rate of change may accelerate or decelerate.

[0061] In this embodiment of the invention, the gradient variation of amplitude and period along the height direction of the biomimetic gradient sinusoidal wave wall can significantly improve the structure's impact resistance and energy absorption capacity. Furthermore, the nonlinear variation of amplitude and period along the height direction can reduce the impact force at the moment of impact, providing excellent buffering and energy absorption. This allows the impact strength of the biomimetic impact-resistant structure to gradually increase with the impact displacement, exhibiting impact hardening. While fully ensuring the safety of the protected object, structural lightweighting is achieved, reducing manufacturing and usage costs.

[0062] In this embodiment of the invention, the rate of change of the sine curve at the bottom of the gradient sinusoidal wave wall is greater than that at the top. This means that at the bottom of the wall, the amplitude and period of the waves change more rapidly, potentially creating more pronounced fluctuations, while the changes at the top are relatively gentle. This design allows the wave effect to be more prominent at the bottom, resulting in better shock resistance.

[0063] By designing different rates of change, the strength and rigidity of the wave wall vary in different regions, which effectively improves its overall stability and enables it to better resist external pressure.

[0064] As can be seen from the above, this invention provides a helical impact-resistant structure with biomimetic gradient sinusoidal wave walls, including an upper plate, a lower plate, and biomimetic gradient sinusoidal wave walls 2. Multiple biomimetic gradient sinusoidal wave walls are arranged in parallel, with the amplitude and period of the sinusoidal curves at their upper and lower ends varying nonlinearly along the height direction, significantly improving the impact resistance of the wave walls. The biomimetic gradient sinusoidal wave walls 2 between adjacent porous structural layers 100 are arranged with an angular difference in the vertical direction, employing an interlayer stacking method mimicking the spiral arrangement of a mantis shrimp, significantly improving the load transfer efficiency between layers. The structure is fabricated using an additive manufacturing method. This invention achieves lightweight design while possessing excellent impact resistance, thereby improving the safety of the protected person and vehicle.

[0065] Inspired by organisms in nature with excellent impact resistance, this invention features a biomimetic gradient sinusoidal wave wall 2 with a cuttlebone layered structure as the main body. By adjusting the asymmetric sinusoidal structure, the impact resistance of the structure is gradually varied, allowing for customized impact protection for vehicles. Furthermore, the biomimetic gradient sinusoidal wave wall 2 between adjacent porous structural layers 100 has an angular difference in the vertical direction, and the structural advantage of the interlayer stacking method that imitates the spiral arrangement of mantis shrimp further improves the safety of vehicles and occupants.

[0066] More specifically, in this embodiment of the invention, the rate of change of the amplitude and period of the biomimetic gradient sinusoidal wave wall along the height direction conforms to a sinusoidal curve, and its contour line satisfies the following equation:

[0067]

[0068] in, A 1 represents the amplitude at the bottom of the wave wall. K 1 represents the period at the bottom of the wave wall. A 2 represents the amplitude at the top of the wave wall. K 2 represents the period at the top of the wave wall. H It is the height of the wave wall. h It is the height value at any height of the wave wall. h ∈[0, H ]).

[0069] In a further embodiment, the biomimetic gradient sinusoidal wave wall varies according to the gradient changes in the amplitude and period of the sinusoidal curve, such as... Figure 1 and Figure 2As shown, where A1 is the amplitude at the bottom of the wave wall, K1 is the period at the bottom of the wave wall, A2 is the amplitude at the top of the wave wall, and K2 is the period at the top of the wave wall, it can be subdivided into 4 different structural design schemes: Scheme 1 is A 1> A 2, K 1> K 2; The second option 2 is A 1> A 2, K 1< K 2; The third option 3 is A 1< A 2, K 1> K 2; The fourth option is 4. A 1< A 2, K 1< K 2. In the first option, 1, A 1 is A 2 to 5 times 2 K 1 is K 2 to 5 times 2; in the second option 2, A 1 is A 2 to 5 times 2 K 2 is K 1 is 2 to 5 times; in the third option 3, A 2 is 2 to 5 times that of A1. K 1 is K 2 to 5 times 2; in the fourth option 4, A 2 is A 2 to 5 times that of 1 K 2 is K 1 is 2 to 5 times that of 1. In this embodiment of the invention, the nonlinear changes in amplitude and period of the biomimetic gradient sinusoidal wave wall along the height direction form four different design schemes. By adjusting the parameters in each design scheme, it is further subdivided into multiple different design schemes, allowing different design schemes to be selected according to the application.

[0070] Preferably, in this embodiment of the invention, the asymmetry of the biomimetic gradient sinusoidal wave wall... U The calculation formula is:

[0071]

[0072] In this embodiment of the invention, the asymmetry degree U is an index used to measure the degree of asymmetry in the shape of the wave wall. The larger the value, the higher the degree of asymmetry. A 1 represents the amplitude at the bottom of the wave wall. K 1 represents the period at the bottom of the wave wall. A 2 represents the amplitude at the top of the wave wall.K 2 is the period at the top of the wave wall.

[0073] Among them, the amplitude part: The ratio of the two amplitudes was calculated, reflecting the relative difference between them.

[0074] Periodic section: The ratio of the two cycles was calculated to reflect the relative difference between them.

[0075] Finally, the two ratios are added together to obtain the overall asymmetry. U In this embodiment of the invention, preferably, the asymmetry of the gradient sinusoidal wave wall of the helical impact-resistant structure with biomimetic gradient sinusoidal wave wall is... U The preferred value is 2-15. In this embodiment of the invention, the asymmetry setting can provide different stiffness and strength in different directions, thereby enhancing the material's impact resistance in all directions. This optimization helps the material better absorb and disperse impact energy. Furthermore, the asymmetry... U An asymmetry value of 2-15, which is preferred, can improve the energy absorption efficiency of a structure under impact, thereby reducing direct impact on stress points. This is crucial for protecting internal structures or other critical components. Furthermore, by designing asymmetric wave shapes, material usage can be reduced while maintaining mechanical performance, achieving a lightweight effect. This is particularly important in aerospace, automotive, and other fields. Further, asymmetric design may improve stress distribution in materials, reduce localized stress concentration, thereby increasing fatigue life and enhancing reliability under repeated impact conditions.

[0076] By calculating the asymmetry, the design characteristics of wave walls can be quantified, making it easier for designers to optimize them.

[0077] In a further embodiment, the biomimetic gradient sinusoidal wave walls are arranged at equal intervals along their length, thereby forming unidirectional channels between the parallel wave walls. The equal interval arrangement in this invention refers to the design of the biomimetic gradient sinusoidal wave walls maintaining a uniform distance along their length to ensure that the spacing between each wave wall is the same. This consistency makes the entire structure visually harmonious and provides excellent impact resistance.

[0078] The unidirectional channel refers to the passage formed between these parallel wave walls that is unidirectional, facilitating the flow of air (or other fluids) in one direction and reducing wind resistance. The unidirectional channel formed in this invention effectively guides airflow, thus reducing wind resistance.

[0079] Furthermore, such as Figure 1The value 'a' represents the wall thickness of the biomimetic gradient sinusoidal wave wall 2. In this embodiment of the invention, preferably, the upper plate 1 and the lower plate 3 have the same thickness, both being 2 to 6 times the wall thickness of the biomimetic gradient sinusoidal wave wall 2. The height of the biomimetic gradient sinusoidal wave wall is 20 to 200 times its wall thickness, the spacing between the biomimetic gradient sinusoidal wave walls is 5 to 30 times their wall thickness, the amplitude of the biomimetic gradient sinusoidal wave wall is 1 to 10 times its wall thickness, and the period of the biomimetic gradient sinusoidal wave wall is 5 to 30 times its wall thickness. These data parameters allow the spiral impact-resistant structure with the biomimetic gradient sinusoidal wave wall in this embodiment of the invention to avoid sudden structural collapse when subjected to impact forces, while also reducing the instantaneous impact force experienced by passengers.

[0080] Furthermore, in embodiments of the present invention, such as Figure 4 , Figure 5 , Figure 6 As shown, each porous structure layer 100 is stacked in a spiral arrangement, that is, each porous structure layer 100 adopts an interlayer stacking arrangement that imitates the spiral arrangement of a mantis shrimp. This invention, by adopting an interlayer stacking arrangement that imitates the spiral arrangement of a mantis shrimp, significantly improves the load transfer efficiency between layers.

[0081] Furthermore, in embodiments of the present invention, such as Figure 4 , Figure 5 , Figure 6 As shown, in this embodiment of the invention, the biomimetic gradient sinusoidal wave walls between adjacent porous structural layers are arranged with an angular difference in the vertical direction, using a layer-by-layer stacking method that mimics the spiral arrangement of a mantis shrimp. That is, each porous structural layer 100 rotates the biomimetic gradient sinusoidal wave wall 2 by an angle, for example, the second layer rotates 10° relative to the first layer, the third layer rotates 10° relative to the second layer, the fourth layer rotates 10° relative to the third layer, and so on, forming a spiral angle. In this embodiment of the invention, the spiral angle formed by the included angle between the biomimetic gradient sinusoidal wave walls 2 of two adjacent porous structural layers 100 is between 0° and 90°. At a 90° included angle, the two adjacent layers are arranged perpendicularly.

[0082] Furthermore, in this embodiment of the invention, the layers of the helical impact-resistant structure with biomimetic gradient sinusoidal wave walls are stacked according to a helical arrangement, wherein the angle between the biomimetic gradient sinusoidal wave walls 2 of two adjacent porous structure layers 100 (also called the helical angle in this embodiment of the invention) is... β When =0°, as Figure 4 As shown, the biomimetic gradient sinusoidal wave walls 2 between each layer are arranged in parallel;

[0083] The rotation angle (also called the helix angle in this invention) between the biomimetic gradient sinusoidal wave wall 2 of the porous structure layers 100 of adjacent layers.β When =90°, such as Figure 5 As shown, the biomimetic gradient sinusoidal wave walls 2 are arranged vertically between each layer. In this arrangement, the pressure on each sinusoidal wave wall can be effectively transferred to all wave walls in the next layer, resulting in stronger impact resistance. This gives the spiral impact-resistant structure with biomimetic gradient sinusoidal wave walls high impact resistance in the vertical direction.

[0084] like Figure 6 As shown, the rotation angle (helix angle) of the biomimetic gradient sinusoidal wave wall 2 between two adjacent porous structure layers 100 is... β At 45°, the impact-resistant structure, while ensuring good impact resistance, has better isotropy and can effectively improve impact resistance under complex working conditions.

[0085] Preferably, in an embodiment of the present invention, a spiral impact-resistant structure with biomimetic gradient sinusoidal wave walls is provided. The biomimetic gradient sinusoidal wave walls of the impact-resistant structure are selected from cuttlebone, and are biomimetic gradient sinusoidal wave walls that mimic the gradient of cuttlebone. The biomimetic gradient sinusoidal wave walls between adjacent porous structural layers are arranged vertically with an angular difference, and the biomimetic objects are selected from mantis shrimp, arranged in a layer-by-layer stacking manner that mimics the spiral arrangement of mantis shrimp.

[0086] In this embodiment of the invention, the biomimetic gradient sinusoidal wave wall is selected from cuttlebone, which means that the wall surface of the biomimetic gradient sinusoidal wave wall adopts a sinusoidal wave shape and has the characteristic of gradient change.

[0087] In this embodiment, the cuttlebone is the skeletal structure of cuttlefish (also known as squid or octopus), which typically has high strength and toughness. Its structure has evolved over many years in nature and can effectively withstand external pressure and impact.

[0088] The biomimetic gradient sinusoidal wave wall 2 designed in this embodiment of the invention mimics the strength and flexibility of cuttlebone to improve its impact resistance.

[0089] In this embodiment, the biomimetic gradient sinusoidal wave walls 2 between each layer are arranged in a spiral pattern, with the biomimetic object selected from the mantis shrimp. Specifically, the biomimetic gradient sinusoidal wave walls between adjacent porous structural layers are arranged vertically with an angular difference, and are arranged in a layer stacking manner that imitates the spiral arrangement of the mantis shrimp. This means that the vertical spiral arrangement of the biomimetic gradient sinusoidal wave walls between adjacent porous structural layers indicates that the structure is designed with a spiral layout, which helps to disperse stress and enhance the stability of the structure.

[0090] Mantis shrimp: A marine creature with extremely high impact and attack power. Its claws can generate tremendous force in a very short time, even capable of crushing shells. The mantis shrimp's molting and structural design make it highly efficient in resisting impacts.

[0091] In this embodiment, the biomimetic gradient sinusoidal wave wall 2 between each layer uses a biomimetic object selected from mantis shrimp, which is intended to utilize its superior impact resistance to enhance the performance and stability of the new structure when facing impact.

[0092] As can be seen, in this embodiment of the invention, by drawing inspiration from the wavy wall characteristics of cuttlefish bone and the spiral layout of mantis shrimp, the aim is to improve the structure's impact resistance and overall performance. This biomimetic design combines the excellent characteristics of organisms in nature and applies them to engineering and materials science to create structures with better performance.

[0093] Preferably, in this embodiment of the invention, pores are formed between adjacent biomimetic gradient sinusoidal wave walls 2 of the helical impact-resistant structure with biomimetic gradient sinusoidal wave walls, resulting in a porosity of 50%-90% for the helical impact-resistant structure. This allows for lightweight design while maintaining impact resistance mechanical properties. Porosity refers to the proportion of void volume to total volume in a material. In this invention, a porosity of 50%-90% means that half to ninety percent of the structure's volume is empty. This high porosity typically reduces the material's weight and may increase its energy absorption capacity, making the material perform better under impact.

[0094] Preferably, the upper plate 1 and lower plate 3 of the helical impact-resistant structure with biomimetic gradient sinusoidal wave walls are both 60mm in length and width, and 0.3mm in thickness. The height of the biomimetic gradient sinusoidal wave walls is 10mm, and the spacing is 4mm. A 1 is 0.3mm. A 2 is 1mm. K 1 is 12mm. K 2 is 60mm. A1 is the amplitude at the bottom of the wave wall, K1 is the period at the bottom of the wave wall, A2 is the amplitude at the top of the wave wall, and K2 is the period at the top of the wave wall.

[0095] Furthermore, the helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall in this embodiment of the invention can be fabricated using an additive manufacturing method. Additive manufacturing, a 3D printing technology, creates three-dimensional objects by adding material layer by layer, as opposed to traditional non-material processing techniques. This method is suitable for manufacturing complex structures and has high material utilization efficiency. This invention uses additive manufacturing technology to create a biomimetic structure characterized by a sinusoidal wave-shaped gradient wall, and this structure is helical, specifically designed to resist external impact forces. By mimicking the characteristics and morphology of organisms in nature, this structure can provide better physical performance and aesthetics.

[0096] Furthermore, in an embodiment of the present invention, a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall is provided, wherein, as... Figure 4 As shown, the upper plate 1 and the lower plate 3 are planar, which can transmit impact force more evenly. Of course, in other embodiments, the upper plate 1 and the lower plate 3 can also be curved.

[0097] Furthermore, in an embodiment of the present invention, a spiral impact-resistant structure with a biomimetic gradient sinusoidal wave wall is provided, wherein the material of the impact-resistant structure can be metal, ceramic or composite material, that is, the materials used to prepare the upper plate 1, the lower plate 3 and the biomimetic gradient sinusoidal wave wall 2 can be metal, ceramic or composite material.

[0098] Furthermore, a spiral impact-resistant structure with a biomimetic gradient sinusoidal wave wall, according to an embodiment of the present invention, can be applied as a human body protection component or an automotive impact-resistant component.

[0099] Based on the above embodiment of a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, this embodiment of the invention also provides a method for preparing a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, the method comprising the following steps:

[0100] S1. Import the preparation functions of the upper plate 1, lower plate 3, and biomimetic gradient sinusoidal wave wall 2 into CAD modeling software to construct the geometric model of the three-dimensional solid of the biomimetic impact-resistant structure, export the STL format model data, and perform layered slicing processing on the biomimetic impact-resistant structure using Magics software.

[0101] STL (STereoLithography) is a file format commonly used in 3D printing and computer-aided design (CAD).

[0102] S2. Import the above 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 printer and place it in a UV curing chamber for curing.

[0103] In this embodiment of the invention, the helical impact-resistant structure with biomimetic gradient sinusoidal wave walls is prepared by additive manufacturing methods, including but not limited to photopolymerization, melt extrusion, selective laser melting, and direct ink writing technology.

[0104] In specific implementation, the preparation method of a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall in an embodiment of the present invention includes the following steps:

[0105] S11. Import the preparation functions of the upper plate 1, the lower plate 3, and the biomimetic gradient sinusoidal wave wall 2 into the modeling software, and use CATIA software (a type of drawing software) to construct a three-dimensional geometric model of the biomimetic impact-resistant structure; when the three-dimensional geometric model is completed, use the 3D printing model processing software Materialise Magics to slice the structure, with a slice thickness of 16μm.

[0106] S12. Pour the prepared photosensitive resin VeroWhitePlus and flexible resin material Agilus into the resin tank, import the above slicing data into a UV curing 3D printer that can spray multiple basic materials at the same time, set the exposure time to 1 second, and start printing; use computer control of the UV beam to selectively cure the photosensitive resin layer by layer.

[0107] S13. After printing, clean the material and place it in a UV curing chamber for curing. You can clean it with ethanol for 40 seconds and then cure it in the UV curing chamber for 350 seconds to complete the preparation of the helical impact-resistant structure with biomimetic gradient sinusoidal wave wall.

[0108] In this embodiment of the invention, the prepared helical impact-resistant structure with biomimetic gradient sinusoidal wave walls can be applied to human protective equipment or car bumpers to absorb the impact energy generated by impact or collision, thereby improving the safety of the human body or vehicle.

[0109] In this embodiment of the invention, the nonlinearity of the biomimetic gradient sinusoidal wave wall of the prepared spiral impact-resistant structure with biomimetic gradient sinusoidal wave wall can reduce the impact force generated at the moment of impact. At the same time, as the impact depth increases, the impact strength of the structure increases, avoiding complete crushing of the structure and improving the safety of the protected object.

[0110] In this embodiment of the invention, the spiral stacking method of the prepared helical impact-resistant structure with biomimetic gradient sinusoidal wave walls can effectively improve the load transfer capability between layers, so that the load acting on the upper wave wall can act on all the wave walls of the lower layer, thereby further improving the impact resistance of the structure.

[0111] In this embodiment of the invention, the prepared helical impact-resistant structure with biomimetic gradient sinusoidal wave wall significantly improves the impact resistance performance and has broad application prospects in aerospace, rail transportation, military and other fields.

[0112] It should be understood that the application of the present invention is not limited to the examples above. For those skilled in the art, improvements or modifications can be made based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall, characterized in that, include: At least two porous structural layers; Each porous structure layer includes an upper plate, a lower plate, and a biomimetic gradient sinusoidal wave wall disposed between the upper plate and the lower plate; The upper plate and the lower plate are arranged in parallel. The biomimetic gradient sinusoidal wave walls are perpendicular to the upper plate and the lower plate, respectively. They are arranged at equal intervals along the length direction and parallel along the width direction inside the space between the upper plate and the lower plate. The amplitude and period of the sinusoidal wave walls change gradient along the height direction. Each of the aforementioned biomimetic gradient sinusoidal wave walls is a biomimetic gradient sinusoidal wave wall that mimics the cuttlebone gradient; The biomimetic gradient sinusoidal wave walls between adjacent porous structural layers are arranged vertically with an angle difference, and are arranged in an interlayer stacking manner that imitates the spiral arrangement of a mantis shrimp. The amplitude and period of the biomimetic gradient sinusoidal wave wall, and the rate of change along the height direction, conform to a sinusoidal curve, and its contour line satisfies the following equation: in, A 1 represents the amplitude at the bottom of the wave wall. K 1 represents the period at the bottom of the wave wall. A 2 represents the amplitude at the top of the wave wall. K 2 represents the period at the top of the wave wall. H It is the height of the wave wall. h It is the height value at any height of the wave wall. h ∈[0, H ]; The biomimetic gradient sinusoidal wave wall is designed based on the gradient changes of the amplitude and period of a sinusoidal curve, where A1 is the amplitude at the bottom of the wave wall, K1 is the period at the bottom of the wave wall, A2 is the amplitude at the top of the wave wall, and K2 is the period at the top of the wave wall. Four different structural design schemes are available: The first option is... A 1> A 2, K 1> K 2; The second option is... A 1> A 2, K 1< K 2; The third option is... A 1< A 2, K 1> K 2; The fourth option is A 1< A 2, K 1< K 2; In the first option, A 1 is A 2 to 5 times 2 K 1 is K 2 to 5 times 2; In the second option, A 1 is A 2 to 5 times 2 K 2 is K 2 to 5 times that of 1; In the third option A 2 is 2 to 5 times that of A1. K 1 is K 2 to 5 times 2; In the fourth option, A 2 is A 2 to 5 times that of 1 K 2 is K 1 is 2 to 5 times that of 1.

2. The helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall as described in claim 1, characterized in that, The upper and lower wave-shaped sections of the sinusoidal wave wall have a non-linear transition.

3. The helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall according to claim 1, characterized in that, The upper and lower sine curves of the gradient sinusoidal wave wall have different periods and amplitudes. The amplitudes and periods of the upper and lower sine curves change nonlinearly along the height direction, with the rate of change at the bottom being greater than that at the top.

4. The helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall according to claim 1, characterized in that, The upper and lower plates of the helical impact-resistant structure with biomimetic gradient sinusoidal wave walls are both 60mm in length and width, and 0.3mm in thickness. The biomimetic gradient sinusoidal wave walls are 10mm high and spaced 4mm apart. A 1 is 0.3mm. A 2 is 1mm, K 1 is 12mm. K 2 is 60mm; where A1 is the amplitude at the bottom of the wave wall, K1 is the period at the bottom of the wave wall, A2 is the amplitude at the top of the wave wall, and K2 is the period at the top of the wave wall.

5. The helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall according to claim 1, characterized in that, The upper and lower plates are planar or curved; the porosity of the helical impact-resistant structure with biomimetic gradient sinusoidal wave walls is 50%-90%.

6. The helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall according to claim 1, characterized in that, The rotation angle between the biomimetic gradient sinusoidal wave walls of two adjacent porous structural layers β It can be 90 degrees, 45 degrees or 0 degrees.

7. A method for preparing a helical impact-resistant structure with a biomimetic gradient sinusoidal wave wall as described in any one of claims 1-6, characterized in that, Including the following steps: S11. Import the preparation functions of the upper plate, lower plate, and the biomimetic gradient sinusoidal wave wall into the modeling software, and use the drawing software to construct a three-dimensional geometric model of the biomimetic impact-resistant structure; when the three-dimensional geometric model is completed, use 3D printing model processing software to slice the structure. S12. Pour the prepared photosensitive resin and flexible resin material into the resin tank, import the slicing data into the UV curing 3D printer that can spray multiple basic materials at the same time, set the exposure time, and start printing; and use the computer to control the UV beam to selectively cure the photosensitive resin layer by layer. S13. After 3D printing is completed, the material is cleaned and placed in an ultraviolet curing chamber for curing to complete the preparation of the helical impact-resistant structure with biomimetic gradient sinusoidal wave wall.

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