Cuttage anti-impact structure with variable mechanical behavior based on double-monomer configuration

Abstract

The invention discloses a cutting impact-resistant structure with variable mechanical behaviors based on a double-monomer configuration, and belongs to the field of impact-resistant structures. The method is mainly composed of a cuttage monomer and a cuttage substrate. The cuttage monomers are provided with single oblate protrusions, and the cuttage monomers are divided into Y-shaped monomers and O-shaped monomers according to the shapes of the cuttage monomers. Flat spherical protrusions are arranged on the plane of the cuttage substrate and are arranged in a uniform array. The cutting substrate is a carrier of two cutting monomers, namely a Y-shaped monomer and an O-shaped monomer, the cutting monomers and the cutting substrate are bent together during impact-resistant stress, and the cutting substrate and the cutting monomers are matched with each other to form a cutting impact-resistant structure. By adjusting permutation and combination of the O-shaped monomers and the Y-shaped monomers, a user-defined cuttage mode is achieved. Through interlocking cuttage, the impact resistance, adjustability and stability of the cuttage impact resistance structure are improved. The invention also has the advantages of easiness in manufacturing, wide application range, long service life and the like.

Description

Technical Field

[0001] The invention relates to a variable mechanical impact-resistant structure based on a double-monomer elliptical configuration, belongs to the field of impact-resistant structures, and is particularly suitable for use in impact-resistant occasions requiring higher stability and flexibility. Background Art

[0002] Most of the existing impact-resistant structures are based on fish scale bionic design, which has good unidirectional impact resistance, but lacks flexibility when bending in the reverse direction. Such structures face many challenges in design and mechanical properties, especially in improving impact resistance and structural stability. The fish scale bionic structures on the market are often manufactured by injection molding or 3D printing, but due to process limitations and structural complexity, it is difficult to achieve precision requirements. The impact resistance effect mainly depends on the material, configuration size and monomer density, resulting in its lack of adjustability and difficulty in adapting to different application scenarios. In addition, the toughness and strength of the structure decrease under repeated bending, and it is impossible to maintain long-term stable impact resistance. When bending in the reverse direction, the existing structure is not flexible enough, which further limits the scope of application. The plugging structure made of non-integrated manufacturing lacks an interlocking function in the socket design, which can easily cause the monomer to slip and affect the overall mechanical performance. Therefore, it is urgent to test and study these structures to improve their reliability and broaden the application scenarios. Summary of the invention

[0003] The following problems exist in the prior art: (1) Due to the limitations of the manufacturing process and the complexity of the structure, it is difficult to achieve the precision required for product application; (2) The configuration lacks adjustability. After the fish scale bionic structure in the prior art is formed, the mechanical properties of the structure are fixed and cannot be adjusted according to the specific application scenario. This is because its impact resistance mainly depends on factors such as materials, configuration size and monomer density; (3) The existing structure has a short service life; (4) When bending in the reverse direction, the existing structure is not flexible enough; (5) The structural stability is insufficient, and the socket design does not have an interlocking function, which easily causes the monomer to slip.

[0004] The purpose of the present invention is to provide a cutting anti-impact structure with variable mechanical behavior based on a dual-monomer configuration, wherein the dual-monomer configuration includes a Y-type monomer and an O-type monomer. The structure improves the adjustability of the mechanical properties of the anti-impact configuration monomer through interlocking cuttings, prolongs the service life of the Y-type monomer and the O-type monomer, and exhibits higher flexibility when bent in reverse. The O-type monomer is characterized by its superior compliance and flexibility, and is suitable for scenes requiring greater deformation capacity; while the Y-type monomer provides stronger support and impact resistance, and is suitable for applications requiring high stability and bearing capacity. By adjusting the arrangement and combination of the O-type and Y-type monomers, the present invention can flexibly adjust the mechanical response of the structure, and realize flexible adaptation and precise adjustment of the structure in different application scenarios to meet different impact resistance requirements. At the same time, the preferred material TPU (thermoplastic polyurethane rubber) is used to make the cutting monomer and the cutting base, which has better impact resistance and production efficiency. In summary, the present invention has the advantages of high stability, strong impact resistance, low manufacturing difficulty, and a wide range of applications.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] The present invention discloses a cutting anti-impact structure with variable mechanical behavior based on a dual-monomer configuration, which is mainly composed of a cutting monomer and a cutting base. The cutting monomer is a cutting monomer with a single oblate spheroid protrusion, which is divided into two cutting monomer configurations, namely a Y-type monomer and an O-type monomer, according to the shape of the cutting monomer. The plane of the cutting base has flatly arranged oblate spheroid protrusions, which are arranged in a uniform array. The cutting base is a carrier of the two cutting monomers, namely the Y-type monomer and the O-type monomer. When subjected to impact stress, the cutting monomer and the cutting base bend together, and the cutting base cooperates with the cutting monomer to form a cutting anti-impact structure.

[0007] The plane of the cutting base has flatly arranged oblate spheroid protrusions, and the oblate spheroid protrusions are arranged in a uniform array. The cutting base optimization method is as follows: Inspired by the interlocking structure of the elytra of the iron beetle, the interlocking structure of the elytra of the iron beetle is an ellipse that is tangent to each other. The basic plane configuration of the interlocking structure of the elytra of the iron beetle consists of three ellipses, one ellipse located on the upper y-axis direction of the plane is defined as the first ellipse, and the other two ellipses are symmetrically distributed on the left and right sides of the first ellipse and are tangent to the first ellipse. The left ellipse is defined as the second ellipse and the right ellipse is defined as the third ellipse. The geometric center of each ellipse is connected by a line to form a layout with an angle to the horizontal direction. The second and third ellipses below only retain the line segment from the tangent point of the first ellipse to its bottom vertex, and the first ellipse only retains two long arcs formed by cutting the tangent point of the lower ellipse. The three line segments are connected to form the basic plane configuration of the interlocking structure of the elytra. At the lower position of the plane y-axis, take the symmetry axis of the basic plane configuration of the elytra interlocking structure as the central rotation axis, and perform central rotation to form a 3D three-dimensional elytra interlocking three-dimensional configuration. From a perspective, the 3D three-dimensional elytra interlocking three-dimensional configuration is a flattened sphere with a concave truncated cone in the middle. The concave truncated cone is used to connect to the bottom surface, and the circular diameter of the bottom of the truncated cone is larger than the diameter of the oblate sphere. The protruding configuration monomers are arranged in a rectangular shape on the base, tangent to each other, forming a cutting base. The morphological characteristics of the oblate spherical protrusions satisfy the following geometric relationship:

[0008] The plane diagram of an ellipse is mainly composed of three ellipses with the same long axis horizontal. The second and third ellipses are placed at the lower left and lower right corners of the first ellipse respectively and make them tangent. The tangent points of the first and second ellipses are P, the tangent points of the first and third ellipses are Q, the left vertex A, the upper vertex B, and the right vertex C of the first ellipse, the lower vertex D and the right vertex E of the second ellipse, and the left vertex F and the lower vertex G of the third ellipse. Then connect DEPABCQFG in sequence along the ellipse edges, and connect GD with line segments to form a closed plane with bilateral symmetry.

[0009] The angle between the center line of the first and third ellipses and the horizontal direction is θ, the length of the ellipse semi-major axis is a, and the length of the minor axis is b. The width of the figure, that is, the length of the line segment GD, is L, and the height, that is, the distance from B to the line segment GD, is H. L, H and θ, a, b have the following relationship:

[0010]

[0011] The monomer plane is rotated 360 degrees around the central axis to form a double-monomer configuration protrusion structure.

[0012] The bottom surface of each monomer protrusion is a circle formed by rotating the line segment GD around the midpoint. Each monomer protrusion forms a rectangular arrangement on the plane, and the bottom circles of two monomer protrusions are tangent to each other, that is, the bottom circles of each monomer protrusion are tangent to each other and the centers of the bottom circles of any four tangent monomer protrusions are located at the four vertices of a square.

[0013] The top of the O-type monomer configuration is an elliptical ring sheet with an elliptical hollow ring configuration in the middle. The bottom of the cutting monomer has a protrusion structure that matches the oblate spheroid protrusion on the cutting base. The length of the Y-type configuration is longer than that of the O-type configuration. The oblate spheroid protrusion below the cutting monomer is inserted into the concave part formed by the array oblate spheroid protrusion pattern on the cutting base, and the cutting monomer is clamped.

[0014] The Y-type monomer is mainly composed of a Y-type sheet and an oblate spheroid protrusion connected to the bottom of each sheet. The O-type monomer is mainly composed of an O-type sheet and an oblate spheroid protrusion connected to the bottom of each sheet. The cutting base is the carrier of the Y-type monomer and the O-type monomer, and the oblate spheroid protrusions are evenly arranged on the base. When subjected to force, the Y-type monomer, the O-type monomer and the base bend together, and the Y-type monomer and the O-type monomer cooperate with each other and combine with the interlocking structure of the cutting base to form an overall cutting impact-resistant structure with variable mechanical behavior.

[0015] The configuration of the Y-type monomer and the O-type monomer is a bionic fish scale structure, and the entire cutting structure is composed of multiple fish scale monomers. Each fish scale monomer has two configurations: O-type monomer and Y-type monomer. The top of the O-type monomer is an elliptical ring sheet with an elliptical hollow in the middle, and a protrusion structure that matches the oblate spheroid protrusion of the cutting base is connected below. In contrast, the length of the Y-type monomer is longer than that of the O-type monomer. The oblate spheroid protrusion below the cutting monomer is inserted into the recessed part on the cutting base and firmly clamps the monomer.

[0016] The present invention discloses a working method of a cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration, comprising the following steps:

[0017] Step 1: The cutting monomer is a monomer with a single oblate spheroid protrusion, which is divided into two configurations according to the shape: a Y-type monomer and an O-type monomer. The oblate spheroid protrusions are evenly arranged on the plane of the cutting substrate, and these protrusions are arranged in an array. The cutting substrate serves as a carrier for the Y-type monomer and the O-type monomer. The oblate spheroid protrusions on the cutting substrate are arranged in a uniform array below the substrate.

[0018] Step 2: Place the cutting impact-resistant structure produced in step 1 on the protected object, which includes wrists and ankles.

[0019] Step 3: When the cutting impact-resistant structure is impacted by external forces, in forward bending, the monomer produces a strong anti-bending effect through the combination of the Y-type elastic body and the O-type elastic body, and the structure exhibits a higher load-bearing capacity; in reverse bending, the elliptical protrusions in the Y-type and O-type monomer structures and the interlocking structure of the cutting base are combined to make the cutting impact-resistant structure show stronger stability and flexibility. The anti-bending effect of the Y-type monomer and the O-type monomer structure stacked on each other during bending and the locking effect of the interlocking structure between the double monolithic sheets and the cutting base enable the structure to effectively disperse stress when subjected to external forces, and absorb impact through bending recovery force, ensuring the stability of the structure under repeated stress;

[0020] When the positive bending is performed: When the positive three-point bending test is performed, the overall structure of the above-mentioned cutting impact resistance is simplified to the situation where the two ends of the simply supported beam are loaded at the center. According to the material mechanics formula, the maximum deflection displacement ω and the loading force F have the following relationship:

[0021]

[0022] Where: ω is the maximum deflection displacement, F is the loading force, l is the support spacing, E is the material elastic modulus, and I is the moment of inertia of the structure. According to formula (1), the equivalent stiffness D is obtained:

[0023]

[0024] According to the analysis of formula (2), the equivalent stiffness depends on the elastic modulus E of the material and the structural parameters I and l.

[0025] In the forward bending, since the dual-monomer cutting body and the cutting base contain a large number of complex Y-type and O-type scale structures, the contact relationship is complex. By introducing the correction coefficient λ, the corrected moment of inertia is:

[0026]

[0027] Where c is the base width, h is the base height, is the volume percentage of the material occupying the area, and H0 is the height from the substrate surface to the embedded height of the scale.

[0028] When the cutting impact-resistant structure is bent in the reverse direction: the main load-bearing part is the base, and the moment of inertia is expressed as:

[0029]

[0030] Where c is the width of the base and h is the height of the base.

[0031] By comparing the ratio of the positive and negative moments of inertia, the ratio of the equivalent stiffness is obtained:

[0032]

[0033] The maximum force value of the O-type monomer is significantly smaller than that of the Y-type monomer. This shows that under the same materials and conditions, the material in the Y direction exhibits a higher force response. Whether it is nylon, TPU or aluminum material, the relationship between the force and displacement in the positive and reverse directions shows a similar trend, but the force response in the Y direction is more significant. The material structure or loading method in the Y direction gives it a higher load-bearing capacity. The performance difference is measured by the ratio β of the cross-sectional areas of the two configurations of the Y-type monomer and the O-type monomer, which shows that the Y-type monomer scales have a larger influence range and a higher load-bearing capacity; the O-type monomer exhibits better flexibility and compliance. β is the ratio of the cross-sectional areas of the Y-type and O-type monomers, and the formula can be obtained:

[0034]

[0035] Where S Y and S O are the cross-sectional areas of the Y-shaped and O-shaped monomers, respectively. Comparing (5) and (6), similar values ​​can be obtained, and this ratio indicates that the Y-shaped configuration has better peak force performance.

[0036] Step 4: When the external force impact disappears, the oblate sphere of the cutting base and the protrusions of the Y-type monomer and the O-type monomer in the cutting impact-resistant structure form an interlocking structure. When the monomer has a tendency to slide outward, the oblate sphere and the protrusions ensure that the cutting monomer will not fall off during the rapid return process through the interlocking constraint force, thereby ensuring the stability of the cutting monomer. At the same time, the stacking resistance of the O-type monomer and the Y-type monomer further enhances the stability of the cutting impact-resistant structure and prevents the monomer from sliding during repeated force.

[0037] Step 5: Because the cutting base and cutting monomer are independent, there is a custom cutting mode. By adjusting the arrangement and combination of O-type and Y-type monomers, the mechanical response of the structure can be flexibly adjusted to achieve flexible adaptation and precise adjustment of the structure in different application scenarios to meet different impact resistance requirements. The service life of the cutting monomer can be extended by replacing the independent cutting monomer.

[0038] In order to enhance the impact resistance, TPU material is preferably used for 3D printing to produce O-type monomers and Y-type monomers, and because the y3o3 configuration has a better impact resistance, the y3o3 configuration is selected as the arrangement method of the cutting monomers on the substrate (the first three rows from top to bottom are Y-type monomers, and the last three rows are O-type monomers).

[0039] Beneficial effects:

[0040] 1. The present invention discloses a cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration, which adopts an integral structure composed of a cutting monomer and a cutting substrate to enhance the impact resistance, adjustability and stability of the structure. The innovation lies in the design of two types of cutting monomers, Y-type and O-type, which are combined with a cutting substrate with uniform oblate spheroid protrusions to form a unique interlocking and anti-bending mechanism. This design effectively disperses stress and absorbs impact through the coordinated bending and interlocking structure of the dual monomers and the substrate, significantly enhancing the impact resistance of the structure.

[0041] 2. The present invention discloses a cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration. Through the anti-bending stacking effect between the Y-type monomer and the O-type monomer and the interlocking structure with the cutting base, efficient stress dispersion and bending recovery force absorption are achieved when subjected to stress, ensuring the high stability of the structure under repeated stress. In addition, due to the independence of the cutting base and the monomer, users can customize the cutting mode according to specific needs, flexibly adjust the mechanical response of the structure, and improve the versatility and applicability of the structure. By replacing the monomer, the service life of the structure can also be effectively extended.

[0042] 3. The present invention discloses a cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration. The design of the cutting base is inspired by the interlocking structure of the elytra of the iron beetle. The present invention designs a strong and flexible 3D interlocking structure of the elytra as the cutting base. Through a unique geometric layout and a rotating central axis, the flexibility and stability during reverse bending are guaranteed, further improving the overall performance. The interlocking design of the cutting monomer and the base ensures that the monomer is not easy to slide when subjected to force, and the thickness of the monomer configuration is precisely controlled to ensure the strength, stability and safety of the structure.

[0043] 4. The present invention discloses a cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration. When the external force impact disappears, the cutting base oblate sphere in the present invention forms an interlock with the protruding parts of the Y-shaped and O-shaped monomers. Through the interlocking constraint force, the monomers are effectively prevented from falling off during the return process, thereby enhancing the stability of the structure. At the same time, the stacking resistance of the O-shaped and Y-shaped monomers further prevents the monomers from sliding off during repeated force application, thereby improving the overall stability of the structure.

[0044] 5. The present invention discloses a cutting anti-impact structure with variable mechanical behavior based on a dual-monomer configuration. The arrangement of Y and O-type cutting monomers on a substrate selects a y3o3 configuration. TPU material is used for 3D printing to produce O-type monomers and Y-type monomers, thereby enhancing the impact resistance and production efficiency of the cutting anti-impact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG1 is a schematic diagram of a cutting substrate of a cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration according to the present invention, wherein:Figure 1a This is a top view of the cutting base. Figure 1b Main view for cutting base Figure 1b , Figure 1c This is the left view of the cutting base. Figure 1d Schematic diagram of the interlocking structure.

[0046] FIG2 is a schematic diagram of two Y and O-type cutting monomers of a cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration of the present invention, wherein: Figure 2a The front view of two types of cutting monomers (O-type on the left and Y-type on the right). Figure 2b The side view of two types of cutting monomers (O-type on the left and Y-type on the right). Figure 2c The top view of two types of cutting monomers (O-type on the left and Y-type on the right).

[0047] Figure 3 is a schematic diagram of the force on the cutting base when it is bent, where: Figure 3a For positive bending, Figure 3b Reverse bend.

[0048] Figure 4 shows the complete impact-resistant structure of cuttings. Figure 4a Modeling diagram, Figure 4b This is a physical diagram.

[0049] Figure 5 These are the pressure-displacement diagrams of the forward and reverse bending tests when the insertion monomer is an O-type of different materials (TPU, nylon, and aluminum).

[0050] Figure 6 These are the pressure-displacement diagrams of the forward and reverse bending tests when the Y-shaped insertion monomer is made of different materials (TPU, nylon, and aluminum).

[0051] Figure 7 These are the pressure-displacement diagrams of the forward and reverse bending tests when the combination of different materials (TPU, nylon, aluminum) is Y3O3.

[0052] Figure 8 Pressure-displacement diagrams of forward and reverse bending tests when the cutting sheets are made of different materials (TPU, nylon, aluminum) and the combinations are single Y, single O, y1o5, y2o4, y4o2, and y5o1.

[0053] Among them: 1—cutting base, 2—Y-shaped cutting monomer, 3—O-shaped cutting monomer, 1.1—oblate spheroid protrusion of cutting base, 1.2—bottom plate of cutting base, 2.1—Y-shaped cutting monomer protrusion, 3.1—O-shaped cutting monomer protrusion. DETAILED DESCRIPTION

[0054] In order to better illustrate the purpose and advantages of the present invention, the invention is further described below with reference to the accompanying drawings and examples.

[0055] Embodiment 1:

[0056] As shown in FIG. 4 , the present embodiment discloses a cutting impact-resistant structure based on a dual-monomer configuration with variable mechanical behavior, which is mainly composed of cutting monomers 2 3 and a cutting substrate 1 .

[0057] As shown in FIG. 2 , the cutting monomers are divided into two types of cutting monomer configurations, namely, a Y-type monomer 2 and an O-type monomer 3 , which are cutting monomers with single oblate spheroid protrusions 2.1 and 3.1 , and the thickness of the cutting monomer configuration is between 23 mm and 24 mm.

[0058] As shown in FIG1 , the plane of the cutting substrate 1.2 has flatly arranged oblate spheroid protrusions 1.1, which are arranged in a uniform array. The cutting substrate is a carrier of two types of cutting monomers, namely, Y-type monomers and O-type monomers. When subjected to impact stress, the cutting monomers and the cutting substrate bend together ( Figure 3a and Figure 3b ), the cutting base and the cutting monomer cooperate with each other to form a cutting impact-resistant structure.

[0059] like Figure 1a As shown in , b, and c, the plane of the cutting substrate has flatly arranged oblate spheroid protrusions, and the oblate spheroid protrusions are arranged in a uniform array. The cutting substrate optimization method is as follows:

[0060] like Figure 1d As shown, inspired by the interlocking structure of the elytra of the iron phantom beetle, the interlocking structure of the elytra of the iron phantom beetle is an ellipse that is tangent to each other. The basic plane configuration of the interlocking structure of the elytra of the iron phantom beetle consists of three ellipses. One ellipse is located at the upper side of the plane y-axis direction and is defined as the first ellipse. The other two ellipses are symmetrically distributed on the left and right sides of the first ellipse and are tangent to the first ellipse. The left ellipse is defined as the second ellipse and the right ellipse is defined as the third ellipse. The geometric center of each ellipse is connected to form a layout with an angle to the horizontal direction. The second and third ellipses below only retain the line segments from the tangent point of the first ellipse to its bottom vertex. The first ellipse only retains two long arcs formed by cutting the tangent points of the lower ellipse. The three line segments are connected to form the basic plane configuration of the interlocking structure of the elytra. At the lower position of the plane y-axis, the symmetry axis of the basic plane configuration of the interlocking structure of the elytra is used as the central rotation axis to form a 3D three-dimensional interlocking three-dimensional configuration of the elytra. The 3D elytra interlocking stereoscopic configuration is observed from a perspective as a flattened sphere connected to a concave truncated cone in the middle. The concave truncated cone is used to connect to the bottom surface, and the circular diameter of the bottom of the truncated cone is larger than the diameter of the oblate sphere. The protruding configuration monomers are arranged in a rectangular shape on the base, tangent to each other, forming a cutting base. The morphological characteristics of the oblate spherical protrusions satisfy the following geometric relationship:

[0061] The plane diagram of an ellipse is mainly composed of three ellipses with the same long axis horizontal. The second and third ellipses are placed at the lower left and lower right corners of the first ellipse respectively and make them tangent. The tangent points of the first and second ellipses are P, the tangent points of the first and third ellipses are Q, the left vertex A, the upper vertex B, and the right vertex C of the first ellipse, the lower vertex D and the right vertex E of the second ellipse, and the left vertex F and the lower vertex G of the third ellipse. Then connect DEPABCQFG in sequence along the ellipse edges, and connect GD with line segments to form a closed plane with bilateral symmetry.

[0062] The angle between the center line of the first and third ellipses and the horizontal direction is θ, the length of the ellipse semi-major axis is a, and the length of the minor axis is b. The width of the figure, that is, the length of the line segment GD, is L, and the height, that is, the distance from B to the line segment GD, is H. L, H and θ, a, b have the following relationship:

[0063]

[0064] The monomer plane is rotated 360 degrees around the central axis to form a double-monomer configuration protrusion structure.

[0065] The bottom surface of each monomer protrusion is a circle formed by rotating the line segment GD around the midpoint. Each monomer protrusion forms a rectangular arrangement on the plane, and the bottom circles of two monomer protrusions are tangent to each other, that is, the bottom circles of each monomer protrusion are tangent to each other and the centers of the bottom circles of any four tangent monomer protrusions are located at the four vertices of a square.

[0066] As shown in Figure 2, the top of the O-type monomer configuration is an elliptical ring sheet with an elliptical hollow ring configuration in the middle. There is a protrusion structure below the cutting monomer that is adapted to the oblate spheroid protrusion on the cutting base. The length of the Y-type configuration is longer than that of the O-type configuration. The oblate spheroid protrusion below the cutting monomer is inserted into the concave part formed by the array oblate spheroid protrusion pattern on the cutting base, and the cutting monomer is clamped.

[0067] As shown in Figure 2, the Y-type monomer is mainly composed of a Y-type sheet and an oblate spheroid protrusion connected to the bottom of each sheet. The O-type monomer is mainly composed of an O-type sheet and an oblate spheroid protrusion connected to the bottom of each sheet. The cutting base is the carrier of the Y-type monomer and the O-type monomer, and the oblate spheroid protrusions are evenly arranged on the base. When subjected to force, the Y-type monomer, the O-type monomer and the base bend together, and the Y-type monomer and the O-type monomer cooperate with each other and combine with the interlocking structure of the cutting base to form an overall cutting impact-resistant structure with variable mechanical behavior.

[0068] As shown in Figure 2, the configuration of the Y-type monomer and the O-type monomer is a bionic fish scale structure, and the entire cutting structure is composed of multiple fish scale monomers. Each fish scale monomer has two configurations: an O-type monomer and a Y-type monomer. The top of the O-type monomer is an elliptical ring sheet with an elliptical hollow in the middle, and a protrusion structure that matches the oblate spheroid protrusion of the cutting base is connected below. In contrast, the length of the Y-type monomer is longer than that of the O-type monomer. The oblate spheroid protrusion below the cutting monomer is inserted into the recessed part on the cutting base and firmly clamps the monomer. Preferably, the thickness of the cutting monomer is between 23mm and 24mm.

[0069] The present invention discloses a working method of a cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration, comprising the following steps:

[0070] Step 1: The cutting monomer is a monomer with a single oblate spheroid protrusion. According to the shape, it is divided into two configurations: Y-type monomer and O-type monomer. The thickness of the cutting monomer is between 23mm and 24mm. The oblate spheroid protrusions are evenly arranged on the plane of the cutting base. These protrusions are arranged in an array. The cutting base serves as a carrier for the Y-type monomer and the O-type monomer. The oblate spheroid protrusions on the cutting base are arranged in a uniform array below the base.

[0071] Step 2: Place the cutting impact-resistant structure produced in step 1 on the protected object, which includes wrists and ankles.

[0072] Step 3: When the cutting impact-resistant structure is impacted by external forces, in forward bending, the monomer produces a strong anti-bending effect through the combination of the Y-type elastic body and the O-type elastic body, and the structure exhibits a higher load-bearing capacity; in reverse bending, the elliptical protrusions in the Y-type and O-type monomer structures and the interlocking structure of the cutting base are combined to make the cutting impact-resistant structure show stronger stability and flexibility. The anti-bending effect of the Y-type monomer and the O-type monomer structure stacked on each other during bending and the locking effect of the interlocking structure between the double monolithic sheets and the cutting base enable the structure to effectively disperse stress when subjected to external forces, and absorb impact through bending recovery force, ensuring the stability of the structure under repeated stress;

[0073] When the positive bending is performed: When the positive three-point bending test is performed, the overall structure of the above-mentioned cutting impact resistance is simplified to the situation where the two ends of the simply supported beam are loaded at the center. According to the material mechanics formula, the maximum deflection displacement ω and the loading force F have the following relationship:

[0074]

[0075] Where: ω is the maximum deflection displacement, F is the loading force, l is the support spacing, E is the material elastic modulus, and I is the moment of inertia of the structure. According to formula (1), the equivalent stiffness D is obtained:

[0076]

[0077] According to the analysis of formula (2), the equivalent stiffness depends on the elastic modulus E of the material and the structural parameters I and l.

[0078] In the forward bending, since the dual-monomer cutting body and the cutting base contain a large number of complex Y-shaped and O-shaped scale structures, the contact relationship is complex. By introducing the correction coefficient λ, the corrected moment of inertia I front for:

[0079]

[0080] Where c is the base width, h is the base height, is the volume percentage of the material occupying the area, and H0 is the height from the substrate surface to the embedded height of the scale.

[0081] When the cutting impact-resistant structure is bent in the reverse direction: the main load-bearing part is the base, and the moment of inertia I opposite It is expressed as:

[0082]

[0083] Where c is the width of the base and h is the height of the base.

[0084] By comparing the ratio of the positive and negative moments of inertia, the ratio of equivalent stiffness α is obtained:

[0085]

[0086] In this example, α=5.5, that is, the stiffness of the forward three-point bend is about 5.5 times that of the reverse three-point bend.

[0087] like Figure 5 , 6 As shown in the figure, the maximum force value of the O-type monomer (25N) is significantly smaller than the maximum force value of the Y-type monomer (80N). This shows that under the same materials and conditions, the material in the Y direction exhibits a higher force response. Whether it is nylon, TPU or aluminum material, the relationship between the force and displacement in the positive and reverse directions shows a similar trend, but the force response in the Y direction is more significant. The material structure or loading method in the Y direction gives it a higher load-bearing capacity. The performance difference is measured by the ratio β of the cross-sectional areas of the two configurations of the Y-type monomer and the O-type monomer, which shows that the Y-type monomer scales have a larger influence range and a higher load-bearing capacity; at the same time, the force-displacement curve of the O-type monomer is smoother, indicating that the O-type monomer exhibits better flexibility and compliance.

[0088] β is the ratio of the cross-sectional areas of the Y-type and O-type monomers, and β is the ratio of the cross-sectional areas of the Y-type and O-type monomers, and the formula can be obtained:

[0089]

[0090] In this example, β = 1.6, where S Y and S O are the cross-sectional areas of the Y-shaped and O-shaped configurations, respectively. This ratio indicates that the Y-shaped configuration has better peak force performance.

[0091] Step 4: When the external force impact disappears, the oblate sphere of the cutting base and the protrusions of the Y-type monomer and the O-type monomer in the cutting impact-resistant structure form an interlocking structure. When the monomer has a tendency to slide outward, the oblate sphere and the protrusions ensure that the cutting monomer will not fall off during the rapid return process through the interlocking constraint force, thereby ensuring the stability of the cutting monomer. At the same time, the stacking resistance of the O-type monomer and the Y-type monomer further enhances the stability of the cutting impact-resistant structure and prevents the monomer from sliding during repeated force.

[0092] Step 5: Because the cutting base and cutting monomer are independent, there is a custom cutting mode. By adjusting the arrangement and combination of O-type and Y-type monomers, the mechanical response of the structure can be flexibly adjusted to achieve flexible adaptation and precise adjustment of the structure in different application scenarios to meet different impact resistance requirements. The service life of the cutting monomer can be extended by replacing the independent cutting monomer.

[0093] like Figure 7 As shown, the force-displacement relationship of various Y3O3 configurations based on different material monomer arrangements. There are significant differences in the force-displacement relationship between different materials and directions. Y3O3TPU nylon material shows the highest force response in both the front and rear directions, indicating that the material has a higher load-bearing capacity in this configuration. In contrast, Y3O3 TPU and Y3O3 aluminum materials have lower force responses in the front and rear directions, indicating that their load-bearing capacity is relatively weak. Y3O3 nylon and Y3O3 nylon TPU materials show moderate force responses.

[0094] like Figure 8 As shown in the figure, in the test based on TPU material, the Y-type and O-type flake monomers with different numbers of rows perform as follows in the three-point bending force-displacement curves on the front and back sides:

[0095] Highest force value: Y TPU positive and Y TPU negative showed the highest force response. Among them, Y TPU positive reached a force value of more than 25N when the displacement reached about 10mm, and Y TPU negative also showed similar high force values.

[0096] Medium force: The force response of O TPU positive and O TPU negative is higher, but slightly lower than that of Y TPU, and the force value is about 20N.

[0097] Other configurations: Other configurations (such as y1o5, y2o4, y3o3, y4o2, y5o1) have lower force responses in the positive and negative directions, with force values ​​between 10N and 15N, showing a flatter force-displacement relationship.

[0098] Combined with Figure 1, the force-displacement differences of TPU materials with different configurations in the positive and negative directions are intuitively shown. The Y TPU configuration shows the highest force response in both the positive and negative directions, indicating that this configuration has a higher load-bearing capacity under this condition. In contrast, the force response of the O TPU configuration is slightly lower, but it still has a strong load-bearing capacity. Other configurations (such as y1o5, y2o4, y3o3, y4o2, y5o1) show moderate or low force responses, and their mechanical properties are inferior to those of Y TPU and O TPU. This shows that different scale configurations have a significant effect on the mechanical properties of the structure.

[0099] The specific description above further illustrates the purpose, technical solutions and beneficial effects of the invention in detail. It should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration, characterized in that: The invention mainly consists of a cutting monomer and a cutting base; the cutting monomer is a cutting monomer with a single oblate spheroid protrusion, and is divided into two cutting monomer configurations, namely a Y-type monomer and an O-type monomer, according to the shape of the cutting monomer; the plane of the cutting base has flatly arranged oblate spheroid protrusions, and the oblate spheroid protrusions are arranged in a uniform array; the cutting base is a carrier of the two cutting monomers, namely the Y-type monomer and the O-type monomer, and the cutting monomer and the cutting base bend together when subjected to impact stress, and the cutting base cooperates with the cutting monomer to form a cutting impact-resistant structure.

2. A cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration as claimed in claim 1, characterized in that: The plane of the cutting base has flatly arranged oblate spheroidal protrusions, which are arranged in a uniform array; the cutting base optimization method is as follows: inspired by the interlocking structure of the elytra of the iron beetle, the interlocking structure of the elytra of the iron beetle is an ellipse that is tangent to each other; the basic plane configuration of the interlocking structure of the elytra of the iron beetle consists of three ellipses, one ellipse is located on the upper y-axis direction of the plane and is defined as the first ellipse, and the other two ellipses are symmetrically distributed on the left and right sides of the first ellipse and are tangent to the first ellipse, the left ellipse is defined as the second ellipse, and the right ellipse is defined as the third ellipse, and the geometric center of each ellipse is connected by a line to form a layout with an angle to the horizontal direction, and the second ellipse and the third ellipse below are only retained to be tangent to the first ellipse. From the line segment from the point to the vertex of the bottom, the first ellipse only retains two long arcs formed by cutting the tangent points of the lower ellipse, and the three line segments are connected to form the basic plane configuration of the elytra interlocking structure; at the lower position of the plane y-axis, the symmetry axis of the basic plane configuration of the elytra interlocking structure is used as the central rotation axis, and the central rotation is performed to form a 3D three-dimensional elytra interlocking three-dimensional configuration; the 3D three-dimensional elytra interlocking three-dimensional configuration is observed from a perspective perspective as a flattened sphere with a concave truncated cone in the middle, the concave truncated cone is used to connect to the bottom surface, and the circular diameter of the bottom of the truncated cone is greater than the diameter of the oblate sphere; the protruding configuration monomers are arranged in a rectangular shape on the base, tangent to each other, and form a cutting base; the morphological characteristics of the oblate spherical protrusions satisfy the following geometric relationship: The plane diagram of an ellipse is mainly composed of three ellipses with the same long axis horizontal. The second and third ellipses are placed at the lower left corner and lower right corner of the first ellipse respectively and make them tangent; the tangent points of the first and second ellipses are P, the tangent points of the first and third ellipses are Q, the left vertex A, the upper vertex B, and the right vertex C of the first ellipse, the lower vertex D and the right vertex E of the second ellipse, and the left vertex F and the lower vertex G of the third ellipse; then DEPABCQFG are connected in sequence along the ellipse edges, and GD is connected with a line segment to form a closed plane with bilateral symmetry; The angle between the center line of the first and third ellipses and the horizontal direction is θ, the length of the ellipse semi-major axis is a, and the length of the minor axis is b; the width of the figure, that is, the length of the line segment GD is L, and the height, that is, the distance from B to the line segment GD is H; L, H and θ, a, b, have the following relationship: Rotate the monomer plane 360 ​​degrees around the central axis to form a double-monomer configuration protrusion structure; The bottom surface of each monomer protrusion is a circle formed by rotating the line segment GD around the midpoint. Each monomer protrusion forms a rectangular arrangement on the plane, and the bottom surface circles of two monomer protrusions are tangent to each other, that is, the bottom surface circles of each monomer protrusion are tangent to each other, and the centers of the bottom surface circles of any four tangent monomer protrusions are located at the four vertices of a square. The top of the O-type monomer configuration is an elliptical ring sheet with an elliptical hollow ring configuration in the middle; the bottom of the cutting monomer has a protrusion structure that matches the oblate spheroid protrusion on the cutting base; the length of the Y-type configuration is longer than that of the O-type configuration; The oblate spherical protrusions below the cutting monomer are inserted into the concave portion formed by the array of oblate spherical protrusions on the cutting base, and the cutting monomer is clamped.

3. A cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration as claimed in claim 2, characterized in that: The Y-type monomer is mainly composed of Y-shaped sheets and oblate spheroid protrusions connected under each sheet; the O-type monomer is mainly composed of O-shaped sheets and oblate spheroid protrusions connected under each sheet; The cutting base is the carrier of Y-shaped monomers and O-shaped monomers, and oblate spheroidal protrusions are evenly arranged on the base. When subjected to force, the Y-shaped monomers, O-shaped monomers and the base bend together, and the Y-shaped monomers and O-shaped monomers cooperate with each other and combine with the interlocking structure of the cutting base to form an overall cutting impact-resistant structure with variable mechanical behavior.

4. A cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration as claimed in claim 3, characterized in that: The configuration of the Y-type monomer and the O-type monomer is a bionic fish scale structure, and the entire cutting structure is composed of multiple fish scale monomers; each fish scale monomer has two configurations: an O-type monomer and a Y-type monomer; the top of the O-type monomer is an elliptical ring sheet with an elliptical hollow in the middle, and a protrusion structure connected to the bottom that is compatible with the oblate spherical protrusion of the cutting base; the length of the Y-type monomer is longer than that of the O-type monomer; the oblate spherical protrusion below the cutting monomer is inserted into the recessed part on the cutting base and firmly clamps the monomer.

5. A cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration as claimed in claim 1, 2, 3 or 4, characterized in that: The thickness of the cutting monomer is between 23mm and 24mm.

6. A cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration as claimed in claim 2, 3 or 4, characterized in that: The working method includes the following steps: Step 1: The cutting monomer is a monomer with a single oblate spheroid protrusion, which is divided into two configurations according to the shape: a Y-type monomer and an O-type monomer. The thickness of the cutting monomer is between 23 mm and 24 mm. The oblate spheroid protrusions are evenly arranged on the plane of the cutting base. These protrusions are arranged in an array. The cutting base serves as a carrier of the Y-type monomer and the O-type monomer. The oblate spheroid protrusions on the cutting base are arranged in a uniform array below the base. Step 2: placing the cutting impact-resistant structure made in step 1 on the protection object, wherein the protection object includes a wrist and an ankle; Step 3: When the cutting impact-resistant structure is impacted by external force, in forward bending, the monomer produces a strong anti-bending effect through the combination of the Y-type elastic body and the O-type elastic body, and the structure shows a higher bearing capacity; in reverse bending, the elliptical protrusions in the Y-type and O-type monomer structures and the interlocking structure of the cutting base are combined to make the cutting impact-resistant structure show stronger stability and flexibility; the anti-bending effect of the Y-type monomer and the O-type monomer structure stacked on each other during bending and the locking effect of the interlocking structure between the double monolithic sheet and the cutting base enable the structure to effectively disperse stress when subjected to external force, and absorb impact through bending recovery force, thereby ensuring the stability of the structure under repeated stress; Step 4: When the external force impact disappears, in the cutting anti-impact structure, the oblate sphere of the cutting base and the protruding parts of the Y-shaped monomer and the O-shaped monomer form an interlocking structure; when the monomer has a tendency to slide outward, the oblate sphere and the protruding part ensure that the cutting monomer will not fall off during the rapid return process through the interlocking constraint force, thereby ensuring the stability of the cutting monomer; at the same time, the stacking resistance of the O-shaped monomer and the Y-shaped monomer further enhances the stability of the cutting anti-impact structure, preventing the monomer from sliding during repeated force; Step 5: Because the cutting base and cutting monomer are independent, a custom cutting mode is available. By adjusting the arrangement and combination of O-type and Y-type monomers, the mechanical response of the structure can be flexibly adjusted to achieve flexible adaptation and precise adjustment of the structure in different application scenarios to meet different impact resistance requirements; the service life of the cutting monomer can be extended by replacing independent cutting monomers.

7. A cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration as claimed in claim 6, characterized in that: In step three, When the positive bending is performed: When the positive three-point bending test is performed, the overall structure of the above-mentioned cutting impact resistance is simplified to the situation where the two ends of the simply supported beam are loaded at the center. According to the material mechanics formula, the maximum deflection displacement ω and the loading force F have the following relationship: Where: ω is the maximum deflection displacement, F is the loading force, l is the support spacing, E is the material elastic modulus, and I is the moment of inertia of the structure. According to formula (1), the equivalent stiffness D is obtained: According to the analysis of formula (2), the equivalent stiffness depends on the elastic modulus E of the material and the structural parameters I and l. In the forward bending, since the dual-monomer cutting body and the cutting base contain a large number of complex Y-type and O-type scale structures, the contact relationship is complex. By introducing the correction coefficient λ, the corrected moment of inertia is: Where c is the base width, h is the base height, is the volume percentage of the material occupying the area, and H0 is the height from the substrate surface to the embedded height of the scale. When the cutting impact-resistant structure is bent in the reverse direction: the main load-bearing part is the base, and the moment of inertia is expressed as: Where c is the width of the base and h is the height of the base. By comparing the ratio of the positive and negative moments of inertia, the ratio of equivalent stiffness α is obtained: The maximum force of the O-type monomer is significantly smaller than that of the Y-type monomer, indicating that under the same materials and conditions, the material in the Y direction exhibits a higher force response. The performance difference is measured by the ratio of the cross-sectional areas of the Y-type monomer and the O-type monomer, which shows that the Y-type monomer scale has a larger influence range and a higher bearing capacity. The O-type monomer exhibits better flexibility and compliance. β is the ratio of the cross-sectional areas of the Y-type and O-type monomers, and β is the ratio of the cross-sectional areas of the Y-type and O-type monomers. The formula can be obtained: Where S Y and S O are the cross-sectional areas of the Y-type and O-type configurations, respectively; comparing (5) and (6), similar values ​​are obtained, and this ratio indicates that the Y-type configuration has better peak force performance.

8. A cutting impact-resistant structure with variable mechanical behavior based on a dual-monomer configuration as claimed in claim 6, characterized in that: TPU material is used for 3D printing to produce O-type monomers and Y-type monomers, and the arrangement of the cutting monomers on the substrate is a y3o3 configuration.

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