CN210715682U - Three-dimensional negative Poisson ratio energy-absorbing filler structure - Google Patents
Three-dimensional negative Poisson ratio energy-absorbing filler structure Download PDFInfo
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- CN210715682U CN210715682U CN201921730696.8U CN201921730696U CN210715682U CN 210715682 U CN210715682 U CN 210715682U CN 201921730696 U CN201921730696 U CN 201921730696U CN 210715682 U CN210715682 U CN 210715682U
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- absorbing filler
- ratio energy
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Abstract
The utility model relates to a negative poisson ratio material technical field especially relates to a three-dimensional negative poisson ratio energy-absorbing filler structure, and this structure is formed by arranging a plurality of unit cell structure on three-dimensional space, the unit cell structure includes at least three monomer, the monomer includes the triangle-shaped structure that two summits are connected, the monomer is followed unit cell structure the central axis circumferencial direction equidistant setting. Every single cell structure all has negative poisson ratio characteristic in the structure, when receiving external impact, the utility model discloses the deformation of filler structure has the transmissibility, and the single cell structure can make up the transmission and warp in the filler structure promptly, and the load that comes from the contact surface transmission transmits the share through single cell structural connection limit. The utility model discloses application range is extensive, resistance to compression bearing capacity is strong, has good energy-absorbing effect.
Description
Technical Field
The utility model relates to a negative poisson ratio material technical field especially relates to a three-dimensional negative poisson ratio energy-absorbing filler structure.
Background
The materials widely used in nature all have positive Poisson's ratio, the cross-sectional area of the material of positive Poisson's ratio is diminished when being stretched, the cross-sectional area will increase when being compressed, Lakes obtains the foamed material of negative Poisson's ratio through the heat treatment to the polyurethane foam for the first time in 1987, its Poisson's ratio is-0.7, and in 1989, Evans et al has realized the negative Poisson's ratio effect in studying the polytetrafluoroethylene with cellular structure, and will name it as the material of drawing and expanding, the mechanical properties of the material of drawing and expanding, namely negative Poisson's ratio are opposite to traditional material, its cross-sectional area will become bigger when being stretched, compared with traditional material, the material of negative Poisson's ratio has unique mechanical properties, compared with traditional material, it has very great advantage in the field of energy absorption and shock resistance. At present, most of the existing negative Poisson ratio fillers are of two-dimensional structures, the deformation mode is single, the application range is limited, the compression-resistant bearing capacity is poor, and the energy absorption effect cannot achieve an ideal effect.
Disclosure of Invention
An object of the utility model is to prior art not enough, and provide a three-dimensional negative poisson's ratio energy-absorbing filler structure, it is when the atress, and resistance to compression shock resistance is strong, has good energy-absorbing effect.
The utility model provides a technical scheme that its technical problem adopted is: a three-dimensional negative Poisson ratio energy-absorbing filler structure is formed by arranging a plurality of unit cell structures in a three-dimensional space, wherein each unit cell structure comprises at least three monomers, each monomer comprises a triangular structure with two intersected vertexes, and the monomers are arranged at equal intervals along the circumferential direction of the central axis of the unit cell structure.
Furthermore, connecting blocks are arranged in the middle of two ends of the unit cell structure, and the monomers are connected with each other through the connecting blocks.
Further, the triangular structure is an isosceles triangle structure.
Furthermore, in the Y direction, two adjacent lines of the unit cell structures are arranged in a staggered mode, and the staggered distance of the unit cell structures in the two adjacent lines is equal to one half of the height of the single body.
Further, in the Y direction, the number difference of the unit cell structures in two adjacent columns is one.
Further, in the X direction or/and the Z direction, two adjacent unit cell structures are connected through the outer side of the monomer.
Further, the projected shapes of the filler structures in the XY plane are the same.
The utility model has the advantages that:
1. a single unit cell structure is supported by a plurality of triangular structures, and each unit cell structure has a two-way contracted negative Poisson ratio characteristic;
2. the energy absorption of the utility model is the sum of the energy absorption of each unit cell structure, thus improving the energy absorption effect of the filler structure;
3. the utility model is formed by a plurality of unit cell structures which are periodically arranged in the three-dimensional direction, when the utility model is impacted by the outside, the whole structure of the utility model has transferability, namely the unit cell structure in the structure is combined to transfer deformation, the load transferred from the contact surface is transferred and shared through the unit cell structure connecting edge, thereby improving the impact resistance and bearing capacity of the material;
4. the utility model discloses the inside buffer zone that forms of structure plays the effect of induced deformation, makes the material have good resistance to compression energy-absorbing effect.
Drawings
Fig. 1 is a schematic structural diagram of the three-dimensional negative poisson's ratio energy-absorbing filler structure of the present invention.
FIG. 2 is a schematic diagram of the single cell structure of the present invention.
Fig. 3 is a schematic view of the projection of fig. 1 in the XY plane.
Description of reference numerals:
1-unit cell structure, 2-single body, 21-triangle structure, 3-connecting block, 4-vertex angle, 5-external included angle, 6-first row, 7-second row, 8-buffer zone.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and the embodiments, and is not intended to limit the scope of the invention.
As shown in fig. 1, the three-dimensional negative poisson ratio energy-absorbing filler structure of the present embodiment is formed by arranging a plurality of unit cell structures 1 in a three-dimensional space, where the unit cell structures 1 include at least three single bodies 2, the single bodies 2 include a triangular structure 21 with two connected vertexes, and the single bodies 2 are arranged at equal intervals along a circumferential direction of a central axis of the unit cell structures 1. As shown in fig. 2, the two triangular structures 21 form the hourglass-shaped single body 2, the triangular structures 21 may be isosceles triangular structures, the unit cell structure 1 is a rotational symmetric structure, and the hourglass-shaped single bodies 2 in the unit cell structure 1 do not intersect with each other. When the load is impacted by the outside, the load is transmitted downwards from the upper plane of the unit cell structure 1, the unit cell structure 1 is in a downward pressed and contracted state, the top angle 4 of the triangular structure 21 is pressed to be enlarged, the outer included angle 5 of the two triangular structures 21 is reduced, the inner side of the monomer 2 deforms and moves towards the center of the unit cell structure, when the bearing limit of the unit cell structure 1 is reached, the distance between the upper plane and the lower plane is extremely small, each side in the middle bends towards the center of the unit cell structure and is extruded with the adjacent plane, and the energy absorption effect of the unit cell structure is mainly achieved through the deformation displacement of each side of the triangular structure 21.
Connecting blocks 3 are arranged in the middle of two ends of the unit cell structure 1, the monomers 2 are connected with each other through the connecting blocks 3, and the upper end and the lower end of the side part of each monomer 2 are connected together through the connecting blocks 3, so that the complete three-dimensional unit cell structure 1 is obtained.
As shown in fig. 3, in the Y direction, two adjacent columns of the unit cell structures 1 are staggered, and the staggered distance between two adjacent columns of the unit cell structures 1 is equal to one half of the height of the single body 2; in the Y direction, the number difference of two adjacent columns of the unit cell structures 1 is one; in the X direction or/and the Z direction, two adjacent unit cell structures 1 are connected through the outer sides of the single bodies 2, the unit cell structures of each row and each column can be combined together through the arrangement mode, the deformation form of each unit cell structure is combined into a whole, the conditions that the adjacent rows or adjacent columns are not deformed and irrelevant when external impact load is applied cannot occur, and the overall compression-resistant energy-absorbing effect is improved.
As shown in fig. 3, the difference in the number of unit cells between the first row 6 and the adjacent second row 7 is one, so that a buffer area 8 is generated on the adjacent rows due to the difference in the number of unit cell structures, the buffer area 8 mainly plays a role of inducing deformation, as exemplified by the first row 6 to the third row shown in fig. 3, two sides of the buffer area 8 are upper triangular structures of the unit cell structures 21, when the upper part of the whole structure is impacted, the bottom edge of the upper triangular structure is stressed, the top angle 4 of the triangle is enlarged, the two side edges are expanded and deformed outwards, one of the two sides is deformed towards the buffer area 8, so as to fill the buffer area 8, at this time, the unit cell on the uppermost layer is compressed to the deformation limit, and the buffer area 8 is filled; pressure continues to be transmitted along the vertical direction, the upper part of the structure is a bearing plane with extremely high density, the pressure is transmitted downwards to the second row 7, the bearing positions of the second row 7 are the same as those of the first row 6 and the third row, when the second row 7 is pressed to deform downwards, a part of load is transversely transmitted to the first row 6 and the third row, namely, the stress is uniformly distributed, the first row 6 and the third row are stressed in the same way, the stressed impact force can be distributed to the whole structure in a force transmission mode, higher impact resistance bearing capacity is achieved, the whole structure deforms and contracts towards the center, the deformation mode is the same as that of a single cell structure, at the moment, the filler structure materials are continuously concentrated and accumulated, the density of the whole material is increased, the structure hardness is continuously increased, and the structure energy absorption effect is good.
As shown in FIG. 3, the projected shape of filler structure in XY plane is the same, the utility model discloses the filler structure carries out the same range arrangement in the Z direction, and no matter which highly looks its arrangement is all unanimous with FIG. 3 from the Z direction, and no matter which face receives the impact, the structure is whole all to demonstrate the deformation mode to the shrink of structure center, and its resistance to compression shock resistance is stronger. Compared with the existing filling structure, the utility model discloses a three-dimensional negative poisson ratio filling structure's energy-absorbing effect is comparatively superior, and it can be applied to car, aviation, sandwich panel, energy-absorbing box etc. and have the engineering application field that can fill and confrontation impact and energy-absorbing have certain requirement.
It should be finally stated that the above embodiments are only used to illustrate the technical solution of the present invention, but not to the limitation of the protection scope of the present invention, it is very easy for researchers in the related field to make a small change to the structure of the filler, and all belong to the protection scope of the present invention to the changes made to the triangle structure number of the unit cell structure, the arrangement quantity, the size, the arrangement quantity of the three-dimensional structure, the arrangement quantity of the unit cell structure, etc. and to the application research of the structure. Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a three-dimensional negative poisson's ratio energy-absorbing filler structure which characterized in that: the cell structure is formed by arranging a plurality of cell structures (1) in a three-dimensional space, wherein each cell structure (1) comprises at least three monomers (2), each monomer (2) comprises a triangular structure (21) with two connected vertexes, and the monomers (2) are arranged at equal intervals along the circumferential direction of the central axis of the cell structure (1).
2. The three-dimensional negative poisson's ratio energy-absorbing filler structure of claim 1, wherein: the single cell structure is characterized in that connecting blocks (3) are arranged in the middle of two ends of the single cell structure (1), and the monomers (2) are connected with each other through the connecting blocks (3).
3. The three-dimensional negative poisson's ratio energy-absorbing filler structure of claim 1, wherein: the triangular structure (21) is an isosceles triangle structure.
4. The three-dimensional negative poisson's ratio energy-absorbing filler structure of claim 1, wherein: in the Y direction, two adjacent lines of the unit cell structures (1) are arranged in a staggered mode, and the staggered distance of the two adjacent lines of the unit cell structures (1) is equal to one half of the height of the single body (2).
5. The three-dimensional negative poisson's ratio energy-absorbing filler structure of claim 1, wherein: in the Y direction, the number difference of two adjacent columns of the unit cell structures (1) is one.
6. The three-dimensional negative poisson's ratio energy-absorbing filler structure of claim 1, wherein: in the X direction or/and the Z direction, two adjacent unit cell structures (1) are connected through the outer side of the monomer (2).
7. The three-dimensional negative poisson's ratio energy-absorbing filler structure of claim 1, wherein: the projected shapes of the filler structures in the XY plane are the same.
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| CN201921730696.8U CN210715682U (en) | 2019-10-16 | 2019-10-16 | Three-dimensional negative Poisson ratio energy-absorbing filler structure |
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| CN201921730696.8U CN210715682U (en) | 2019-10-16 | 2019-10-16 | Three-dimensional negative Poisson ratio energy-absorbing filler structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110984416A (en) * | 2019-12-18 | 2020-04-10 | 青岛理工大学 | Negative Poisson ratio structure with three-dimensional characteristic and combination method thereof |
| CN112665460A (en) * | 2020-12-22 | 2021-04-16 | 北京理工大学 | Indent honeycomb type explosion-proof construction |
| CN112836408A (en) * | 2021-02-02 | 2021-05-25 | 汕头大学 | Unit body, three-dimensional cell unit body and structure body with positive and negative Poisson's ratio |
| CN113525273A (en) * | 2021-07-15 | 2021-10-22 | 广州大学 | Three-dimensional structure with negative Poisson ratio characteristic and combination method thereof |
| CN113991221A (en) * | 2021-10-25 | 2022-01-28 | 吉林大学 | Battery pack sandwich shell with negative Poisson ratio layered quadrilateral energy absorption structure |
| CN114941673A (en) * | 2021-12-08 | 2022-08-26 | 西安交通大学 | Composite negative Poisson's ratio structure for buffering energy absorption |
| CN115263958A (en) * | 2022-06-24 | 2022-11-01 | 中国电子科技集团公司第十研究所 | Lattice structure with heat transfer and energy absorption and vibration reduction characteristics |
-
2019
- 2019-10-16 CN CN201921730696.8U patent/CN210715682U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110984416A (en) * | 2019-12-18 | 2020-04-10 | 青岛理工大学 | Negative Poisson ratio structure with three-dimensional characteristic and combination method thereof |
| CN110984416B (en) * | 2019-12-18 | 2021-06-11 | 青岛理工大学 | Negative Poisson ratio structure with three-dimensional characteristic and combination method thereof |
| CN112665460A (en) * | 2020-12-22 | 2021-04-16 | 北京理工大学 | Indent honeycomb type explosion-proof construction |
| CN112836408A (en) * | 2021-02-02 | 2021-05-25 | 汕头大学 | Unit body, three-dimensional cell unit body and structure body with positive and negative Poisson's ratio |
| CN112836408B (en) * | 2021-02-02 | 2024-02-09 | 汕头大学 | Unit body with positive and negative poisson ratio, three-dimensional cell unit body and structure body |
| CN113525273A (en) * | 2021-07-15 | 2021-10-22 | 广州大学 | Three-dimensional structure with negative Poisson ratio characteristic and combination method thereof |
| CN113991221A (en) * | 2021-10-25 | 2022-01-28 | 吉林大学 | Battery pack sandwich shell with negative Poisson ratio layered quadrilateral energy absorption structure |
| CN113991221B (en) * | 2021-10-25 | 2023-09-22 | 吉林大学 | Battery pack sandwich shell with negative poisson ratio layered quadrilateral energy absorption structure |
| CN114941673A (en) * | 2021-12-08 | 2022-08-26 | 西安交通大学 | Composite negative Poisson's ratio structure for buffering energy absorption |
| CN114941673B (en) * | 2021-12-08 | 2023-08-18 | 西安交通大学 | Composite negative poisson ratio structure for buffering and absorbing energy |
| CN115263958A (en) * | 2022-06-24 | 2022-11-01 | 中国电子科技集团公司第十研究所 | Lattice structure with heat transfer and energy absorption and vibration reduction characteristics |
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