Energy-consuming cell element based on internal friction mechanism of auxetic honeycomb and metamaterial applied by energy-consuming cell element

Abstract

The invention relates to the technical field of energy-consuming materials, and particularly discloses an energy-consuming cell based on an auxetic honeycomb internal friction mechanism and a metamaterial applying the energy-consuming cell based on the auxetic honeycomb internal friction mechanism, the energy-consuming cell based on the auxetic honeycomb internal friction mechanism comprises a concave hexagonal unit, a first dovetail unit and a second dovetail unit; the second dovetail units and the first dovetail units are distributed in the concave hexagonal units in a bilateral symmetry manner; each concave hexagonal unit is provided with two concave angles; the vertex angle of the first dovetail unit and the vertex angle of the second dovetail unit are respectively connected with the two inner concave angles; the tail tips of the first dovetail units and the tail tips of the second dovetail units are in contact with the concave hexagonal units; according to the energy dissipation cell element based on the auxetic honeycomb internal friction mechanism, the double-dovetail friction units are embedded into the concave hexagonal honeycomb cell holes, the friction effect is enhanced through double dovetail, prestress can be applied, and therefore the friction effect can be adjusted, and the adjustment has great design flexibility.

Description

Technical Field

[0001] The invention relates to the technical field of energy-consuming materials, and in particular to an energy-consuming cell based on a friction mechanism within a tensile honeycomb. Background Art

[0002] The current dovetail friction unit has the following disadvantages:

[0003] 1. Small friction and low energy consumption efficiency.

[0004] Second, friction can only be generated during compression, while during stretching, no friction will be generated due to the expansion of the concave hexagonal cells. This "one-way" energy dissipation effect further reduces the energy dissipation effect of the material.

[0005] 3. It is difficult to precisely control the friction between the dovetail and the straight wall, and the friction effect is not easily designed. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the present invention provides an energy-consuming cell based on the friction mechanism of tensile honeycomb, in which a "double dovetail" friction unit is embedded in the concave hexagonal honeycomb cell. The double dovetail not only enhances the friction effect, but also can apply prestress, so that the friction effect can be adjusted, and this adjustment has great design flexibility.

[0007] To solve the above problems, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides an energy dissipation cell based on a friction mechanism within a tensile honeycomb, comprising: an inwardly concave hexagonal unit, a first dovetail unit, and a second dovetail unit.

[0009] The second dovetail unit and the first dovetail unit are distributed in the concave hexagonal unit in a bilaterally symmetrical manner.

[0010] There is a gap between the first dovetail unit and the second dovetail unit.

[0011] The indented hexagonal unit has two indented corners.

[0012] The top angle of the first dovetail unit and the top angle of the second dovetail unit are respectively connected to the two concave angles.

[0013] The tail tip of the first dovetail unit and the tail tip of the second dovetail unit are both in contact with the concave hexagonal unit.

[0014] In the energy dissipation cell based on the friction mechanism within the auxetic honeycomb provided by at least one embodiment of the present disclosure, a connecting unit is provided between the first dovetail unit and the second dovetail unit.

[0015] The first dovetail unit and the second dovetail unit are both provided with an inner concave portion.

[0016] One end of the connecting unit is connected to the middle of the inner concave portion of the first dovetail unit.

[0017] The other end of the connecting unit is connected to the middle of the inner recess of the second dovetail unit.

[0018] After the first dovetail unit and the second dovetail unit are connected through the connecting unit, the biggest benefit is that friction can be generated during stretching, which cannot be achieved by a single dovetail structure.

[0019] In the energy dissipation cell based on the friction mechanism within the auxetic honeycomb provided by at least one embodiment of the present disclosure, the first dovetail unit and the second dovetail unit are both isosceles dovetail units.

[0020] The connection unit is located in the middle of the concave hexagonal unit.

[0021] In the energy dissipation cell based on the friction mechanism of the auxetic honeycomb provided by at least one embodiment of the present disclosure, the connection unit is one of a rope, a flexible rod or a rigid rod. When the connection unit is one of a rope, a flexible rod or a rigid rod, the combined metamaterial can exhibit the effect of tension and compression bidirectional friction energy dissipation.

[0022] In the energy dissipation cell based on the friction mechanism within the auxetic honeycomb provided by at least one embodiment of the present disclosure, the first dovetail unit and the second dovetail unit both include: a first straight rod, a second straight rod and an arc rod or two connecting rods.

[0023] The second straight rod has the same length as the first straight rod.

[0024] The first straight rod and the second straight rod are connected with the arc rod or the two connecting rods to form a closed loop structure.

[0025] In the energy dissipation cell based on the friction mechanism of auxetic honeycomb provided by at least one embodiment of the present disclosure, the four sides at the two concave corners of the concave hexagonal unit have equal lengths, and the other two sides are parallel to each other and have equal lengths.

[0026] In the energy dissipation cell based on the friction mechanism of the auxetic honeycomb provided by at least one embodiment of the present disclosure, a third straight rod is provided at the concave corner of the concave hexagonal unit.

[0027] The third straight rod is located outside the concave hexagonal unit.

[0028] In a second aspect, the present invention provides a metamaterial, which is composed of a plurality of the above-mentioned energy dissipation cells based on the friction mechanism of the auxetic honeycomb.

[0029] The beneficial effects of the present invention are:

[0030] A "double dovetail" friction unit is embedded in the concave hexagonal honeycomb cells. The double dovetail not only enhances the friction effect, but also applies prestress, so that the friction effect can be adjusted, and this adjustment has great design flexibility.

[0031] The concave corners of the two dovetail structures are connected by connecting units, which increases the friction between the dovetail and the straight wall and improves energy consumption efficiency; by adjusting the dovetail unit and the connecting unit, the friction effect can be precisely customized. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 Schematic diagram of the structure of the energy dissipation cell based on the friction mechanism of the tensile honeycomb in Example 1.

[0034] Figure 2 Schematic diagram of the distribution of the first straight rod, the second straight rod and the second connecting rod.

[0035] Figure 3 Schematic diagram of the structure of the energy dissipation cell based on the friction mechanism of the tensile honeycomb in Examples 2 and 3.

[0036] Figure 4 Schematic diagram of the structure of the energy-consuming cell based on the friction mechanism within the tensile honeycomb in Example 4.

[0037] Figure 5 This is a partial schematic diagram of the metamaterial provided in Example 5.

[0038] In the figure:

[0039] 10. Concave hexagonal unit;

[0040] 20. First dovetail unit; 21. First straight rod; 22. Second straight rod; 23. Second connecting rod; 24. Arc rod;

[0041] 30. Second dovetail unit;

[0042] 40. Connecting unit;

[0043] 50. The third straight shot. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments. Obviously, the described embodiments are only a part of the embodiments, rather than all the embodiments.

[0045] Example 1

[0046] like Figure 1 and 2 As shown, this embodiment provides an energy dissipation cell based on the friction mechanism of auxetic honeycomb, including a concave hexagonal unit 10, a first dovetail unit 20 and a second dovetail unit 30.

[0047] Specifically, the second dovetail unit 30 and the first dovetail unit 20 are symmetrically distributed in the concave hexagonal unit 10 , and there is a gap between the first dovetail unit 20 and the second dovetail unit 30 .

[0048] Specifically, the concave hexagonal unit 10 has two concave corners, the four sides at the two concave corners of the concave hexagonal unit 10 are equal in length, and the other two sides are parallel to each other and have equal lengths. A third straight rod 50 is provided at the concave corner of the concave hexagonal unit 10, and the third straight rod 50 is located outside the concave hexagonal unit 10.

[0049] Specifically, the top corners of the first dovetail unit 20 and the top corners of the second dovetail unit 30 are connected to the two concave corners respectively. The tail tip of the first dovetail unit 20 and the tail tip of the second dovetail unit 30 are both in contact with the edge of the concave hexagonal unit 10.

[0050] In this embodiment, the first dovetail unit 20 and the second dovetail unit 30 are both isosceles dovetail units.

[0051] In this embodiment, the first dovetail unit 20 and the second dovetail unit 30 both include a first straight rod 21 , a second straight rod 22 and two connecting rods 23 .

[0052] Specifically, the first straight rod 21 has the same length as the second straight rod 22. The first straight rod 21, the second straight rod 22 and the second connecting rod 23 are connected to form a closed loop structure.

[0053] In this embodiment, the first dovetail unit 20 and the second dovetail unit 30 are symmetrically embedded in the concave hexagonal unit 10. The first dovetail unit 20 and the second dovetail unit 30 are both isosceles triangle units. A certain distance is reserved between the two dovetail units. When the material is pulled, the two dovetail units in the cell will separate from the straight edge without generating friction; when the material is compressed, the two dovetail units will start to contact the straight edge and generate increasing friction. It should be pointed out that this friction effect is a one-way friction effect that only occurs when the material is compressed.

[0054] Example 2

[0055] like Figure 3 As shown, this embodiment provides an energy dissipation cell based on the friction mechanism of auxetic honeycomb, including a concave hexagonal unit 10, a first dovetail unit 20 and a second dovetail unit 30.

[0056] Specifically, the second dovetail unit 30 and the first dovetail unit 20 are symmetrically distributed in the concave hexagonal unit 10 , and there is a gap between the first dovetail unit 20 and the second dovetail unit 30 .

[0057] Specifically, the concave hexagonal unit 10 has two concave corners, the four sides at the two concave corners of the concave hexagonal unit 10 are equal in length, and the other two sides are parallel to each other and have equal lengths. A third straight rod 50 is provided at the concave corner of the concave hexagonal unit 10, and the third straight rod 50 is located outside the concave hexagonal unit 10.

[0058] Specifically, the top corners of the first dovetail unit 20 and the top corners of the second dovetail unit 30 are connected to the two concave corners respectively. The tail tip of the first dovetail unit 20 and the tail tip of the second dovetail unit 30 are both in contact with the edge of the concave hexagonal unit 10.

[0059] In this embodiment, a connection unit 40 is provided between the first dovetail unit 20 and the second dovetail unit 30 , and the connection unit 40 is a rigid rod.

[0060] The first dovetail unit 20 and the second dovetail unit 30 are both provided with a recessed portion; one end of the connecting unit 40 is connected to the middle of the recessed portion of the first dovetail unit 20 , and the other end of the connecting unit 40 is connected to the middle of the recessed portion of the second dovetail unit 30 .

[0061] In this embodiment, the first dovetail unit 20 and the second dovetail unit 30 are both isosceles dovetail units, and the connecting unit 40 is located in the middle of the concave hexagonal unit 10 .

[0062] In this embodiment, the first dovetail unit 20 and the second dovetail unit 30 both include a first straight rod 21 , a second straight rod 22 and two connecting rods 23 .

[0063] The first straight rod 21 and the second straight rod 22 have the same length.

[0064] The first straight rod 21, the second straight rod 22 and the second connecting rod 23 are connected to form a closed loop structure.

[0065] The concave parts of the two dovetail units are connected by a connecting unit. The two dovetail units connected by the connecting unit have a tensile expansion effect. If the curvature of the curved edge or the concave angle of the two dovetail units is appropriate, the expansion deformation of the two dovetail units in the cell hole will exceed the concave hexagon when the material is pulled, so that the dovetail unit contacts the connecting unit and generates increasing friction; when the material is compressed, the dovetail unit is separated from the connecting unit due to the shrinkage deformation exceeding the hexagonal cell hole, so that no friction is generated. This is a one-way friction effect that only generates friction during tension.

[0066] Example 3

[0067] like Figure 3 As shown, this embodiment provides an energy dissipation cell based on the friction mechanism of the tensile honeycomb, which is different from the embodiment 2 in that the connection unit 40 is a rope or a flexible rod.

[0068] Compared with Example 2, the connecting unit 40 between the first dovetail unit 20 and the second dovetail unit 30 is changed into a rope or a flexible rod, so that when stretched, the rope drives the dovetail to expand and produces a friction effect with the rope or the flexible rod, and when compressed, the structure degenerates into a situation with a compression friction effect similar to that of the embodiment because the rope does not work. Therefore, this situation can be regarded as a bidirectional friction structure combined with Example 1 and Example 2. This embodiment realizes the tension and compression bidirectional friction effect by using only one cell, and the design is simpler.

[0069] Example 4

[0070] like Figure 4 As shown, this embodiment provides an energy dissipation cell based on the friction mechanism of the tensile honeycomb, which is different from Example 2 in that the first dovetail unit 20 and the second dovetail unit 30 both include a first straight rod 21, a second straight rod 22 and a curved rod 24.

[0071] Specifically, the first straight rod 21 has the same length as the second straight rod 22. The first straight rod 21, the second straight rod 22 and the arc rod 24 are connected to form a closed loop structure.

[0072] Example 5

[0073] like Figure 5 As shown, this embodiment provides a metamaterial, which is composed of a combination of multiple energy-dissipating cells based on the friction mechanism of the auxetic honeycomb in Embodiment 1 and Embodiment 2.

[0074] Specifically, the energy dissipation cells based on the friction mechanism of the auxetic honeycomb in Example 1 and the energy dissipation cells based on the friction mechanism of the auxetic honeycomb in Example 2 are alternately distributed. The material as a whole will present a bidirectional friction effect with both tension and compression having friction effects.

[0075] Although the embodiments of the present application have been shown and described above, the scope of protection of the present invention is not limited thereto, and any changes or substitutions that are not conceivable through creative work should be included in the scope of protection of the present invention; unless explicitly stated, any elements, actions or instructions used in this document should not be interpreted as critical or necessary.

Claims

1. An energy dissipation cell based on the friction mechanism of auxetic honeycomb, characterized in that: include: Concave hexagonal unit; First dovetail unit; as well as A second dovetail unit is distributed in the concave hexagonal unit in a bilaterally symmetrical manner with the first dovetail unit; There is a gap between the first dovetail unit and the second dovetail unit; The concave hexagonal unit has two concave corners; The top angle of the first dovetail unit and the top angle of the second dovetail unit are respectively connected to the two concave angles; The tail tip of the first dovetail unit and the tail tip of the second dovetail unit are both in contact with the concave hexagonal unit.

2. The energy dissipation cell based on the friction mechanism of auxetic honeycomb according to claim 1, characterized in that: A connecting unit is provided between the first dovetail unit and the second dovetail unit; The first dovetail unit and the second dovetail unit are both provided with an inner concave portion; One end of the connecting unit is connected to the middle of the inner concave portion of the first dovetail unit; The other end of the connecting unit is connected to the middle of the inner recess of the second dovetail unit.

3. The energy dissipation cell based on the friction mechanism of auxetic honeycomb according to claim 2, characterized in that: The first dovetail unit and the second dovetail unit are both isosceles dovetail units; The connection unit is located in the middle of the concave hexagonal unit.

4. The energy dissipation cell based on the friction mechanism of auxetic honeycomb according to claim 2, characterized in that: The connection unit is one of a rope, a flexible rod or a rigid rod.

5. The energy dissipation cell based on the friction mechanism of auxetic honeycomb according to claim 3, characterized in that: The first dovetail unit and the second dovetail unit both include: First straight shot; A second straight rod having the same length as the first straight rod; and curved rod or two-link; The first straight rod and the second straight rod are connected with the arc rod or the two connecting rods to form a closed loop structure.

6. The energy dissipation cell based on the friction mechanism of auxetic honeycomb according to claim 1, characterized in that: The four sides at the two concave corners of the concave hexagonal unit have equal lengths, and the other two sides are parallel to each other and have equal lengths.

7. The energy dissipation cell based on the friction mechanism of auxetic honeycomb according to claim 1, characterized in that: A third straight rod is provided at the concave corner of the concave hexagonal unit; The third straight rod is located outside the concave hexagonal unit.

8. A metamaterial, characterized in that: It is composed of a plurality of energy dissipation cells based on the friction mechanism within the auxetic honeycomb as described in any one of claims 1 to 7.

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