Stacked integrated auxetic honeycomb structure

Abstract

The stacked integrated auxetic honeycomb structure comprises a plurality of unit cells which are sequentially and adjacently arranged, and the unit cells are in mirror symmetry along a symmetry plane; in the direction of one side of the symmetry plane, each unit cell comprises a first plate body and a second plate body which are parallel to each other; the third plate body and the fourth plate body are parallel to each other; the first diverging plate group is connected with the first plate body and is positioned in the direction of one side, far away from the second plate body, of the first plate body; the second diverging plate group is connected with the second plate body and is positioned in the direction of one side, far away from the first plate body, of the second plate body; a parallelogram structure is defined by the first plate body, the second plate body, the third plate body and the fourth plate body. The problems that in the prior art, an auxetic material is insufficient in negative Poisson's ratio effect, low in multi-direction bearing capacity and low in rigidity are solved, and the purposes of achieving the multi-direction negative Poisson's ratio effect, improving the structural elasticity modulus and the overall rigidity and improving the mechanical stability and the environmental adaptability of an auxetic structure are achieved.

Description

Technical Field

[0001] The invention relates to the field of layered honeycomb structures, and in particular to a stacked integrated auxetic honeycomb structure. Background Art

[0002] With the rapid development of society and the rapid advancement of science and technology, the requirements for material and structural performance in the actual production process in various fields are constantly increasing. In order to meet this demand, the development of high-performance, lightweight new structures has become a key path to explore new functions of materials and lead new directions for the industry. This not only helps to comprehensively improve the comprehensive performance of materials, but also effectively breaks through the bottleneck of scarce resources, providing strong support for the sustainable development of various industries.

[0003] Auxetic metamaterials are currently widely-watched advanced functional structural materials. Thanks to their unique negative Poisson's ratio effect, auxetic honeycomb structures exhibit a series of outstanding mechanical properties, including excellent load-bearing capacity, extraordinary elastic modulus, and excellent impact resistance, fracture toughness and fatigue resistance. These outstanding mechanical properties have enabled them to demonstrate broad application potential in a variety of fields such as impact protection, aerospace, biomedicine, civil engineering, and national defense science and technology, and have therefore become a research hotspot in domestic and foreign academic and engineering circles, attracting extensive and in-depth attention and exploration. However, the applicant discovered during the research process that traditional auxetic materials have the following defects during use: the auxetic performance is difficult to control, and the evolution law of the Poisson's ratio with deformation is complex; stress concentration is easily generated during axial compression; significant anisotropy leads to insufficient multi-directional load-bearing capacity; excessive porosity leads to low stiffness, and it is also difficult to use in the load-bearing field. Summary of the invention

[0004] The present invention provides a stacked integrated traction honeycomb structure to solve the problems of insufficient negative Poisson's ratio effect, weak multi-directional bearing capacity and low stiffness of the traction materials in the prior art, achieve the multi-directional negative Poisson's ratio effect and improve the structural elastic modulus and overall stiffness, thereby improving the mechanical stability and environmental adaptability of the traction structure.

[0005] The present invention is achieved through the following technical solutions:

[0006] A stacked integrated auxetic honeycomb structure comprises a plurality of unit cells arranged adjacent to each other in sequence, wherein the unit cells are mirror-symmetrical along a symmetry plane;

[0007] On one side of the symmetry plane, the unit cell comprises:

[0008] A first plate body and a second plate body parallel to each other, one side edge of each of the first plate body and the second plate body being located on the symmetry plane;

[0009] A third plate body and a fourth plate body parallel to each other, wherein the third plate body and the fourth plate body are located between the first plate body and the second plate body;

[0010] A first diverging plate group connected to the first plate body and located on a side of the first plate body away from the second plate body;

[0011] A second diverging plate group connected to the second plate body and located on a side of the second plate body away from the first plate body;

[0012] The first plate body, the second plate body, the third plate body and the fourth plate body are surrounded to form a parallelogram structure;

[0013] The first diverging plate group and the second diverging plate group both include a plurality of plate bodies, and the plate bodies in the first diverging plate group and the second diverging plate group correspond to each other one by one and match each other.

[0014] In view of the problems of insufficient negative Poisson's ratio effect, weak multi-directional bearing capacity and low stiffness of the tensile materials in the prior art, the present invention proposes a stacked integrated tensile honeycomb structure, which includes a plurality of unit cells arranged adjacent to each other in sequence. Since the present application is an integrated structure, the adjacent unit cells are consolidated, and the specific consolidation method is not specifically limited herein.

[0015] In the present application, each unit cell is a mirror-symmetrical structure, and on one side of its symmetry plane, there is a parallelogram structure surrounded by a first plate body, a second plate body, a third plate body and a fourth plate body, wherein the first plate body and the second plate body are opposite, and the third plate body and the fourth plate body are opposite. The first divergent plate group and the second divergent plate group are respectively connected to the first plate body and the second plate body, and extend toward the outer side of the parallelogram structure; the number of plates in the first divergent plate group is the same as the number of plates in the second divergent plate group; for two unit cells along the direction of the line connecting the first divergent plate group and the second divergent plate group, the first divergent plate group of one unit cell is docked with the second divergent plate group of the other unit cell in a one-to-one correspondence, thereby ensuring the continuity of the structure of the present application in this direction.

[0016] The structural design of the present application helps to improve the tensile expansion effect of honeycomb materials, and can overcome the problem of insufficient multi-directional bearing capacity caused by significant anisotropy in the prior art, achieve a significant negative Poisson's ratio effect, and have a greater total plastic dissipation energy than traditional structures when dealing with impact loads in various directions, and can maintain better self-locking stability, while being able to produce a larger deformation that converges in the impact direction, which helps to improve the overall stiffness and strength of the structure, and also ensures that the structure still has a negative Poisson's ratio effect under large deformation, which is beneficial to improving the overall stiffness and elastic modulus. In addition, the number of layers of the present application is not limited in specific application, and the number of unit cells in each layer is not limited. It can be flexibly set according to specific application requirements, and can be widely used in impact protection, aerospace, biomedicine, civil engineering and many other fields.

[0017] Furthermore, a connection point between the third plate body and the second plate body is located on the symmetry plane; and a connection point between the third plate body and the first plate body is located at 1 / 4 of the width of the first plate body.

[0018] The third plate body in the present application is a plate body added inside the structure, which extends from the symmetry plane to both sides until it is consolidated with the first plate bodies on both sides, and the consolidation position is located at 1 / 4 of the width of the first plate body.

[0019] Those skilled in the art should understand that the 1 / 4 width of the first plate body in the present solution refers to the position of 1 / 4 width of the first plate body from the side close to the symmetry plane to the side far from the symmetry plane along the width direction; or it can be understood that dividing the first plate body into four equal parts along its own width direction will obtain three division points, and the aforementioned 1 / 4 width of the first plate body is the position of the division point closest to the symmetry plane.

[0020] This design in the present solution is one of the key technologies to ensure that the present application has an obvious multi-directional negative Poisson's ratio effect and good isotropic stability. The material of the third plate can be consistent with the other plates, or it can be different from the other plates, and it can be flexibly selected according to the field of use; the applicant found in the research process that when the third plate is made of different materials, the overall strength and stiffness of the tensile honeycomb structure of the present application can be significantly changed, thereby reflecting different load-bearing and impact resistance properties; therefore, the present application can achieve adaptation to more working conditions and more application fields by only changing the material of the third plate, thereby significantly improving the environmental adaptability of the present application.

[0021] Furthermore, the connection between the fourth plate and the first plate is located at an end of the first plate away from the symmetry plane; the connection between the fourth plate and the second plate is located at 3 / 4 of the width of the second plate.

[0022] As above, the 3 / 4 width of the second plate in this scheme refers to the position of 3 / 4 width of the second plate from the side close to the symmetry plane to the side far away from the symmetry plane along the width direction; or it can be understood that dividing the second plate into four equal parts along its own width direction will obtain three division points, and the 3 / 4 width of the second plate mentioned above is the position of the division point farthest from the said symmetry plane.

[0023] Furthermore, it also includes a fifth plate body located between the first plate body and the second plate body; the connection between the fifth plate body and the first plate body is located at the intersection of the first plate body and the fourth plate body; the connection between the fifth plate body and the second plate body is located at the intersection of the second plate body and the third plate body.

[0024] The fifth plate in this solution can be understood as being arranged along the diagonal of the parallelogram structure, and one end of which is located on the symmetry plane of the unit cell. This arrangement can significantly enhance the overall stiffness and strength modulus of the present application and improve mechanical stability.

[0025] Furthermore, the first diverging plate group includes a sixth plate body, a seventh plate body and an eighth plate body; the seventh plate body is located between the sixth plate body and the eighth plate body;

[0026] The connection points between the sixth plate body, the seventh plate body and the first plate body are all located on the symmetry plane; the connection point between the eighth plate body and the first plate body is located at 3 / 4 of the width of the first plate body.

[0027] The second diverging plate group includes a ninth plate body, a tenth plate body and an eleventh plate body; the tenth plate body is located between the ninth plate body and the eleventh plate body; the connection between the tenth plate body, the eleventh plate body and the second plate body is located at an end of the second plate body away from the symmetry plane; the connection between the ninth plate body and the second plate body is located at 1 / 4 of the width of the second plate body.

[0028] In this scheme, the sixth plate and the seventh plate are distributed in a V shape, and the tenth plate and the eleventh plate are distributed in a V shape. For two unit cells along the connecting line of the first divergent plate group and the second divergent plate group: the sixth plate of one unit cell is opposite to the ninth plate of the other unit cell, and a continuous structure can be formed; the seventh plate of one unit cell is opposite to the tenth plate of the other unit cell, and the eighth plate of one unit cell is opposite to the eleventh plate of the other unit cell.

[0029] Furthermore, the third plate, the sixth plate and the ninth plate are parallel to each other; the fourth plate, the eighth plate and the eleventh plate are parallel to each other; and the fifth plate, the seventh plate and the tenth plate are parallel to each other.

[0030] Preferably, the unit cell satisfies:

[0031] AB>AD;

[0032] AB>BC=AE; wherein: AB is the length of the fifth plate; AD is the length of the first plate; BC is the length of the third plate; AE is the length of the fourth plate.

[0033] Those skilled in the art should understand that the length of each plate in the present application refers to the length on the cross section perpendicular to the symmetry plane.

[0034] Preferably, the unit cell satisfies:

[0035] 1 / 5BF<DF<2 / 3BF;

[0036] Wherein: BF is the projection length of the fifth plate on the symmetry plane; DF is the projection length of the sixth plate or the seventh plate on the symmetry plane.

[0037] Preferably, the unit cell satisfies:

[0038] 30°<θ1+θ2+θ3<90;

[0039] 0°<θ1<45°;

[0040] Wherein: θ1 is the angle between the third plate and the symmetry plane; θ2 is the angle between the third plate and the fifth plate; θ3 is the angle between the fifth plate and the second plate.

[0041] Compared with the prior art, the present invention has at least the following advantages and beneficial effects:

[0042] 1. The stacked integrated tensile honeycomb structure of the present invention helps to improve the tensile effect of the honeycomb material, improve the in-plane bearing capacity, and overcome the problem of insufficient bearing capacity caused by significant anisotropy in the prior art, and achieves a significant negative Poisson's ratio effect. When responding to impact loads, the total energy dissipated by plasticity is greater than that of traditional structures, and at the same time, a larger deformation that shrinks in the impact direction can be generated.

[0043] 2. The stacked integrated tensile honeycomb structure of the present invention significantly improves the overall stiffness, strength and elastic modulus of the structure, while still having a negative Poisson's ratio effect under large deformation; at the same time, it overcomes the problem of low stiffness due to high porosity in the prior art.

[0044] 3. The stacked integrated tensile honeycomb structure of the present invention has no limit on the number of layers in specific applications, and the number of unit cells in each layer is also not limited. It can be flexibly arranged according to specific application requirements and can be widely used in impact protection, aerospace, biomedicine, civil engineering and many other fields.

[0045] 4. The stacked integrated tensile honeycomb structure of the present invention adopts an integrated structure, which can eliminate interface defects and improve fatigue life. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0047] Figure 1 It is a front view of a unit cell in a specific embodiment of the present invention;

[0048] Figure 2 It is a schematic diagram of the dimensioning of a unit cell in a specific embodiment of the present invention;

[0049] Figure 3Schematic diagram of the positional relationship of adjacent unit cells in a specific embodiment of the present invention;

[0050] Figure 4 It is an overall front view of a specific embodiment of the present invention;

[0051] Figure 5 It is a schematic diagram of the overall structure of a specific embodiment of the present invention;

[0052] Figure 6 It is a schematic diagram of overall dimension marking of a specific embodiment of the present invention;

[0053] Figure 7 It is a dynamic simulation schematic diagram of a specific embodiment of the present invention;

[0054] Figure 8 The energy-displacement curve of a specific embodiment of the present invention at an impact speed of 60 m / s;

[0055] Fig. 9 It is the energy-displacement curve at the impact speed of 30 m / s in a specific embodiment of the present invention.

[0056] Marks and corresponding parts names in the attached drawings:

[0057] 1-first plate, 2-second plate, 3-third plate, 4-fourth plate, 5-fifth plate, 6-sixth plate, 7-seventh plate, 8-eighth plate, 9-ninth plate, 10-tenth plate, 11-eleventh plate. DETAILED DESCRIPTION

[0058] In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples and the accompanying drawings. The schematic embodiments of the present invention and the description thereof are only used to explain the present invention and are not intended to limit the present invention. In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0059] Embodiment 1:

[0060] A superimposed integrated auxetic honeycomb structure, such as Figures 3 to 6 As shown, it includes a number of unit cells arranged adjacent to each other in sequence, and the unit cells are as follows Figure 1 and Figure 2 As shown, it is mirror-symmetric along the symmetry plane;

[0061] On one side of the symmetry plane, the unit cell comprises:

[0062] A first plate body 1 and a second plate body 2 are parallel to each other, and one side edge of the first plate body 1 and the second plate body 2 are both located on the symmetry plane;

[0063] A third plate body 3 and a fourth plate body 4 are parallel to each other, and the third plate body 3 and the fourth plate body 4 are located between the first plate body 1 and the second plate body 2;

[0064] A first diverging plate group connected to the first plate body 1 and located on a side of the first plate body 1 away from the second plate body 2;

[0065] A second diverging plate group connected to the second plate body 2 and located on a side of the second plate body 2 away from the first plate body 1;

[0066] The first plate body 1, the second plate body 2, the third plate body 3 and the fourth plate body 4 are surrounded to form a parallelogram structure;

[0067] The first diverging plate group and the second diverging plate group both include a plurality of plate bodies, and the plate bodies in the first diverging plate group and the second diverging plate group correspond to each other one by one and match each other.

[0068] The connection point between the third plate body 3 and the second plate body 2 is located on the symmetry plane; the connection point between the third plate body 3 and the first plate body 1 is located at 1 / 4 of the width of the first plate body 1 .

[0069] The connection between the fourth plate body 4 and the first plate body 1 is located at an end of the first plate body 1 away from the symmetry plane; the connection between the fourth plate body 4 and the second plate body 2 is located at 3 / 4 of the width of the second plate body 2.

[0070] It also includes a fifth plate body 5 located between the first plate body 1 and the second plate body 2; the connection between the fifth plate body 5 and the first plate body 1 is located at the intersection of the first plate body 1 and the fourth plate body 4; the connection between the fifth plate body 5 and the second plate body 2 is located at the intersection of the second plate body 2 and the third plate body 3.

[0071] In this embodiment, Figure 2 As shown, in the cross section, the first plate 1, the fourth plate 4 and the fifth plate 5 meet at point A; the second plate 2, the third plate 3 and the fifth plate 5 meet at point B; the first plate 1 and the third plate 3 meet at point C; the fourth plate 4 and the second plate 2 meet at point E; ACBE is a parallelogram, AC=BE, AE=BC.

[0072] In this embodiment, the length and thickness of the first plate body 1 and the second plate body 2 are equal. Figure 2 In the figure, point B and point D are both on the symmetry plane, CD = 1 / 4AD; BE = 3 / 4AD.

[0073] Embodiment 2:

[0074] A stacked integrated auxetic honeycomb structure, based on Example 1:

[0075] The first diverging plate group includes a sixth plate body 6, a seventh plate body 7 and an eighth plate body 8; the seventh plate body 7 is located between the sixth plate body 6 and the eighth plate body 8;

[0076] The connection points between the sixth plate body 6 , the seventh plate body 7 and the first plate body 1 are all located on the symmetry plane; the connection point between the eighth plate body 8 and the first plate body 1 is located at 3 / 4 of the width of the first plate body 1 .

[0077] The second diverging plate group includes a ninth plate body 9, a tenth plate body 10 and an eleventh plate body 11; the tenth plate body 10 is located between the ninth plate body 9 and the eleventh plate body 11; the connection between the tenth plate body 10, the eleventh plate body 11 and the second plate body 2 is located at the end of the second plate body 2 away from the symmetry plane; the connection between the ninth plate body 9 and the second plate body 2 is located at 1 / 4 of the width of the second plate body 2.

[0078] The third plate 3, the sixth plate 6 and the ninth plate 9 are parallel to each other; the fourth plate 4, the eighth plate 8 and the eleventh plate 11 are parallel to each other; the fifth plate 5, the seventh plate 7 and the tenth plate 10 are parallel to each other.

[0079] The unit cell satisfies:

[0080] AB>AD;

[0081] AB>BC=AE;

[0082] 1 / 5BF<DF<2 / 3BF;

[0083] 30°<θ1+θ2+θ3<90;

[0084] 0°<θ1<45°; wherein: AB is the length of the fifth plate 5; AD is the length of the first plate 1; BC is the length of the third plate 3; AE is the length of the fourth plate 4; BF is the projection length of the fifth plate 5 on the symmetry plane; DF is the projection length of the sixth plate 6 or the seventh plate 7 on the symmetry plane; θ1 is the angle between the third plate 3 and the symmetry plane; θ2 is the angle between the third plate 3 and the fifth plate 5; θ3 is the angle between the fifth plate 5 and the second plate 2.

[0085] In a more preferred embodiment, Figure 1 and Figure 2 As shown, the sum of the projection lengths of the sixth plate body 6 and the ninth plate body 9 on the symmetry plane is equal to the projection length of the third plate body 3 on the symmetry plane.

[0086] In a more preferred embodiment, Figure 1 and Figure 2 As shown, the sum of the projection lengths of the seventh plate body 7 and the tenth plate body 10 on the symmetry plane is equal to the projection length of the fifth plate body 5 on the symmetry plane.

[0087] In a more preferred embodiment, Figure 1 and Figure 2 As shown, the sum of the projection lengths of the eighth plate body 8 and the eleventh plate body 11 on the symmetry plane is equal to the projection length of the fourth plate body 4 on the symmetry plane.

[0088] In a more preferred embodiment, the unit cell also satisfies: (θ1+θ2+θ3) / 5≤θ1≤4(θ1+θ2+θ3) / 5.

[0089] In a more preferred embodiment, the unit cell also satisfies: 0.4BF<L<0.6BF; wherein L is the projection length of the first plate body 1 or the second plate body 2 on the cross section perpendicular to the symmetry plane.

[0090] In a more preferred embodiment, based on Figure 2 The application may also meet the following conditions:

[0091] AB=BC / [sinθ3*sin(180°-θ2-θ3)];

[0092] BF = AB*cos(θ1+θ2);

[0093] DF=AB*sin(θ1+θ2) / tan(θ1+θ2+θ3);

[0094] AD=AB*sin(θ1+θ2) / sin(θ1+θ2+θ3);

[0095] BC=L*sinθ3 / [sin(θ1+θ2)*sin(180°-θ2-θ3)]=AB*[sinθ3*sin(180°-θ2-θ3)];

[0096] AC=L*sinθ2 / [sin(θ1+θ2)*sin(180°-θ2-θ3)]=AB*sinθ2 / sin(180°-θ2-θ3);

[0097] BD=cos(θ1+θ2)*AB-AB*sin(θ1+θ2) / tan(θ1+θ2+θ3);

[0098] CD=AB*sin(θ1+θ2) / sin(θ1+θ2+θ3)-AB*sinθ2 / sin(180°-θ2-θ3);

[0099] sin(θ1+θ2)*sin(180°-θ2-θ3)=sin(θ1+θ2+θ3);

[0100] sin(θ1+θ2)*sin(180°-θ1-θ2-θ3)=sin(θ1+θ2+θ3)*sinθ2 / sinθ3.

[0101] In the specific application of this embodiment, Figures 4 to 6 The overall structure shown in the figure is used, and the overall structure is formed in one piece, preferably by additive manufacturing (3D printing) or overall molding process. Among them, the four square-shaped unit cells are connected by the following method: Figure 3 The structure shown is formed.

[0102] Embodiment 3:

[0103] A stacked integrated auxetic honeycomb structure is based on the structure in Example 2. This example uses ABAQUS / Explicit to perform dynamic simulation analysis, and establishes a traditional double-arrow model of the same size for comparison.

[0104] Dynamic simulation process such as Figure 7 As shown, a layered traction honeycomb structure is pressed down by an impact plate, and the dimensions of the traction honeycomb structure are: B = 120mm, H = 60mm, T = 60mm, t = 0.5mm, L = 10mm, θ1 = 12.567°, θ2 = 16.95°, θ3 = 20.478°4°. Where t is the wall thickness of any plate. The mass of the upper impact plate is 200kg, and a dynamic simulation comparison test is carried out using a uniform impact velocity V = 60m / s and V = 30m / s. The test objects are the traction honeycomb structure of the present application and the prior art of the traditional double-arrow honeycomb structure.

[0105] Through dynamic simulation analysis, the energy-displacement (60m / s) curve is obtained as follows Figure 8 As shown in the energy-displacement curve (30m / s) Fig. 9 Based on the test results, the total plastic dissipation energy of the present application is EA = 1.01 × 10 7 MJ, while the total plastic dissipation energy of the prior art is EA = 5.19 × 10 6MJ, it can be seen that the present invention has a significant improvement compared with the traditional structure, and the improvement is nearly twice; when the impact speed is 30m / s, the total plastic dissipation energy of the present invention is EA=5.47×10 6 MJ, the total plastic dissipation energy of the prior art is EA = 2.65 × 10 6 MJ, the present application also has a significant improvement compared with the traditional structure, and the total plastic dissipation energy is increased by more than double. Through two comparative experiments, it can be seen that the present application has a significant performance improvement compared with the existing technology.

[0106] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method 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.

[0107] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. The stacked integrated auxetic honeycomb structure is characterized by: It includes a plurality of unit cells arranged adjacent to each other in sequence, and the unit cells are mirror-symmetrical along a symmetry plane; On one side of the symmetry plane, the unit cell comprises: A first plate body (1) and a second plate body (2) are parallel to each other, and one side edge of the first plate body (1) and the second plate body (2) are both located on the symmetry plane; A third plate body (3) and a fourth plate body (4) which are parallel to each other, wherein the third plate body (3) and the fourth plate body (4) are located between the first plate body (1) and the second plate body (2); A first diverging plate group connected to the first plate body (1) and located on a side of the first plate body (1) away from the second plate body (2); a second diverging plate group connected to the second plate body (2) and located on a side of the second plate body (2) away from the first plate body (1); The first plate body (1), the second plate body (2), the third plate body (3) and the fourth plate body (4) are surrounded to form a parallelogram structure; The first diverging plate group and the second diverging plate group both include a plurality of plate bodies, and the plate bodies in the first diverging plate group and the second diverging plate group correspond to each other one by one and match each other.

2. The stacked integrated auxetic honeycomb structure according to claim 1, characterized in that: The connection point between the third plate body (3) and the second plate body (2) is located on the symmetry plane; the connection point between the third plate body (3) and the first plate body (1) is located at 1 / 4 of the width of the first plate body (1).

3. The stacked integrated auxetic honeycomb structure according to claim 1, characterized in that: The connection point between the fourth plate body (4) and the first plate body (1) is located at the end of the first plate body (1) away from the symmetry plane; the connection point between the fourth plate body (4) and the second plate body (2) is located at 3 / 4 of the width of the second plate body (2).

4. The stacked integrated auxetic honeycomb structure according to claim 1, characterized in that: It also includes a fifth plate (5) located between the first plate (1) and the second plate (2); the connection between the fifth plate (5) and the first plate (1) is located at the intersection of the first plate (1) and the fourth plate (4); and the connection between the fifth plate (5) and the second plate (2) is located at the intersection of the second plate (2) and the third plate (3).

5. The stacked integrated auxetic honeycomb structure according to claim 4, characterized in that: The first diverging plate group comprises a sixth plate body (6), a seventh plate body (7) and an eighth plate body (8); the seventh plate body (7) is located between the sixth plate body (6) and the eighth plate body (8); The connection points between the sixth plate body (6), the seventh plate body (7) and the first plate body (1) are all located on the symmetry plane; the connection point between the eighth plate body (8) and the first plate body (1) is located at 3 / 4 of the width of the first plate body (1).

6. The stacked integrated auxetic honeycomb structure according to claim 5, characterized in that: The second diverging plate group comprises a ninth plate body (9), a tenth plate body (10) and an eleventh plate body (11); the tenth plate body (10) is located between the ninth plate body (9) and the eleventh plate body (11); the connection points between the tenth plate body (10), the eleventh plate body (11) and the second plate body (2) are both located at the end of the second plate body (2) away from the symmetry plane; the connection point between the ninth plate body (9) and the second plate body (2) is located at 1 / 4 of the width of the second plate body (2).

7. The stacked integrated auxetic honeycomb structure according to claim 6, characterized in that: The third plate (3), the sixth plate (6) and the ninth plate (9) are parallel to each other; the fourth plate (4), the eighth plate (8) and the eleventh plate (11) are parallel to each other; and the fifth plate (5), the seventh plate (7) and the tenth plate (10) are parallel to each other.

8. The stacked integrated auxetic honeycomb structure according to claim 7, characterized in that: The unit cell satisfies: AB>AD; AB>BC=AE; wherein: AB is the length of the fifth plate (5); AD is the length of the first plate (1); BC is the length of the third plate (3); and AE is the length of the fourth plate (4).

9. The stacked integrated auxetic honeycomb structure according to claim 7, characterized in that: The unit cell satisfies: 1 / 5BF<DF<2 / 3BF; Wherein: BF is the projection length of the fifth plate (5) on the symmetry plane; DF is the projection length of the sixth plate (6) or the seventh plate (7) on the symmetry plane.

10. The stacked integrated auxetic honeycomb structure according to claim 7, characterized in that: The unit cell satisfies: 30°<θ1+θ2+θ3<90; 0°<θ1<45°; Wherein: θ1 is the angle between the third plate (3) and the symmetry plane; θ2 is the angle between the third plate (3) and the fifth plate (5); θ3 is the angle between the fifth plate (5) and the second plate (2).

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