CN209657302U - A kind of three-dimensional metamaterial structure with zero Poisson's ratio - Google Patents
A kind of three-dimensional metamaterial structure with zero Poisson's ratio Download PDFInfo
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- CN209657302U CN209657302U CN201920195277.2U CN201920195277U CN209657302U CN 209657302 U CN209657302 U CN 209657302U CN 201920195277 U CN201920195277 U CN 201920195277U CN 209657302 U CN209657302 U CN 209657302U
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Abstract
The utility model discloses a kind of three-dimensional metamaterial structures with zero Poisson's ratio, it is made of multiple base units, the base unit includes two sizes and all identical compression unit of structure, the compression unit includes connection pillar and side supports column, the side supports column is fixed on the connection pillar midpoint, the side supports column includes two the first bevel edges and the second bevel edge intersected at a certain angle, and described two compression units are longitudinally mutually perpendicular to.Microscopical structure in technical solutions of the utility model is three-dimensional structure, structure is simple, and zero effects of Poisson's ratio that the zero Poisson's ratio Meta Materials obtained combined by this microscopical structure have three directions can still keep zero effects of Poisson's ratio even if applying certain displacement load in different directions.Therefore this Meta Materials applicability is wider, can be applied to different positions more flexiblely.
Description
Technical field
The utility model relates to Meta Materials field, especially a kind of three-dimensional metamaterial structure with zero Poisson's ratio.
Background technique
" Meta Materials " are provided according to general literature is defined as: one kind has extraordinary physical not available for natural material
The artificial composite structure or material of matter.A branch of the auxetic Meta Materials as Meta Materials, main one extraordinary physical
Matter is that have auxetic effect.According to the calculation formula of Poisson's ratio:
Wherein, ε x indicates the transverse strain of material, and ε y indicates the longitudinal strain of material.
When Poisson's ratio is zero, the material is indicated under tension (or compression), there is no send out for the strain in vertical load direction
Changing.That is in addition to loaded direction, other all directions do not deform material, that is, described " zero Poisson's ratio
Effect ".The material for having this kind of effect was very suitable in the outer masterpiece used time, sensitive very to the deformation comparison under non-loaded direction
To not allowing the case where deforming.In addition to this, zero Poisson's ratio Meta Materials are generally configured with honeycomb, therefore it is inhaled in energy
Receipts, specific strength, specific stiffness etc. show the structural behaviour better than general material.
Current zero Poisson's ratio Meta Materials common problem is:
(1) microscopical structure is complicated, and there are certain difficulties in preparation；
(2) zero Poisson's ratio Meta Materials of part are still two-dimensional structure；
(3) there are zero effects of Poisson's ratio there is usually one direction for zero Poisson's ratio Meta Materials of two-dimensional structure.
Utility model content
The utility model is intended to solve one of above-mentioned technical problem in the related technology at least to a certain extent.For this purpose,
The utility model proposes a kind of three-dimensional metamaterial structures with zero Poisson's ratio, have zero effects of Poisson's ratio in three directions, fit
It is wider with property, different positions can be applied to more flexiblely.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of three-dimensional metamaterial structure with zero Poisson's ratio, is made of multiple base units, and the base unit includes
Two sizes and all identical compression unit of structure, the compression unit include connection pillar and side supports column, the side
Support column is fixed on the connection pillar midpoint, the side supports column include the first bevel edge angled therebetween and second tiltedly
Side, described two compression units are longitudinally mutually perpendicular to.
As an improvement of the above technical solution, the three-dimensional auxetic structure by multiple base units in the horizontal direction and
Vertical direction stacks.
As a further improvement of the above technical scheme, it is connected between multiple base units by the connection pillar.
Further, the three-dimensional auxetic structure is prepared by 3D printer.
Further, the material of the three-dimensional auxetic structure includes PLA consumptive material.
One or more technical solutions at least have the advantages that wherein the one of the utility model in the utility model
A technical solution includes a kind of three-dimensional metamaterial structure with zero Poisson's ratio, is made of multiple base units, and the basis is single
Member includes two sizes and all identical compression unit of structure, and the compression unit includes connection pillar and side supports column, institute
Side supports column is stated to be fixed on the connection pillar midpoint, the side supports column include two intersect at a certain angle
One bevel edge and the second bevel edge, described two compression units are longitudinally mutually perpendicular to.Microscopical structure in technical solutions of the utility model
It is three-dimensional structure, structure is simple, and the zero Poisson's ratio Meta Materials obtained combined by this microscopical structure have the zero of three directions
Effects of Poisson's ratio can still keep zero effects of Poisson's ratio even if applying certain displacement load in different directions.Therefore this Meta Materials
Applicability is wider, can be applied to different positions more flexiblely.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the schematic diagram of the basic structure of the utility model embodiment；
Fig. 2 is the schematic diagram of the macrostructure of the utility model embodiment；
Fig. 3 is the schematic diagram before the Z-direction compression of the utility model embodiment；
Fig. 4 is the compressed schematic diagram of Z-direction of the utility model embodiment；
Fig. 5 is the schematic diagram before the Y-direction compression of the utility model embodiment；
Fig. 6 is the compressed schematic diagram of Y-direction of the utility model embodiment.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
Referring to Fig.1, a kind of three-dimensional metamaterial structure with zero Poisson's ratio of the utility model, by multiple base units 1
Composition, the base unit 1 include two sizes and all identical compression unit 6 of structure, and the compression unit 6 includes connection branch
Column 2 and side supports column 3, the side supports column 3 are fixed on 2 midpoint of connection pillar, and the side supports column 3 includes
First bevel edge 4 and the second bevel edge 5 angled therebetween, described two compression units 6 are longitudinal to be mutually perpendicular to.If being carried out to Z-direction single
The analysis of axis compression Effective Elastic Properties, it is assumed that structure bears unidirectional load σ in Z-directionzIt is F with Z-direction resultant forcez, then:
If applying displacement load Δ u in Z-directionz, then X-direction will generate displacement uxDisplacement u will be generated with Y-directiony,
Δ u is apparent from by symmetryx=Δ uy.Therefore the equivalent strain of all directions are as follows:
That is the equivalent elastic modulus and Poisson's ratio of Z-direction are as follows:
It is analyzed using ABAQUS finite element software, finite element model uses C3D10 unit, and basis material uses bullet
The linear model that property modulus is 1927Mpa and Poisson's ratio is 0.38.2 length of connection pillar of microscopical structure is 20mm, and first tiltedly
Bar 4 and the every 10mm of 5 length of the second brace, 60 ° of tilt angle.
Certain displacement load is applied in Z-direction and Y-direction to model respectively.From analysis result it is found that applying Z-direction
Displacement load after, do not deform (Fig. 3, Fig. 4) for the two sides (face Y-Z, the face X-Z) of model, and there are zero Poisson's ratio effects
It answers.After the displacement load for applying Y-direction, the two sides (X-Y plane, the face Y-Z) of model do not deform (Fig. 5, Fig. 6) equally,
There are zero effects of Poisson's ratio.By symmetry it is found that equally existing zero effects of Poisson's ratio after X-direction application displacement load.Therefore this reality
With zero novel Poisson's ratio Meta Materials, there are zero effects of Poisson's ratio in three directions.
As an improvement of the above technical solution, the three-dimensional auxetic structure by multiple base units 1 in the horizontal direction
It is stacked with vertical direction.By carrying out regular array to base unit, and then three directions of one kind can be obtained and have
The three-dimensional metamaterial of standby zero Poisson's ratio.
As a further improvement of the above technical scheme, it is connected between multiple base units by the connection pillar 2,
Stable structure is reliable.
Further, the three-dimensional auxetic structure is prepared by 3D printer, and the material of the three-dimensional auxetic structure includes PLA consumption
Material, zero effects of Poisson's ratio shown in the utility model embodiment and the basis material characteristic for forming the microscopical structure without
It closes, preparation is simple, and cost is relatively low.
The above specific structure and dimension data are illustrated to the preferred embodiment of the utility model, but this reality
It is not limited to the specific embodiments with novel creation, those skilled in the art are in the premise without prejudice to the spirit of the present invention
Various equivalent deformation or replacement can be also made down, these equivalent deformations or replacement are all contained in the claim of this application and are limited
In fixed range.
Claims (5)
1. a kind of three-dimensional metamaterial structure with zero Poisson's ratio, it is characterised in that: be made of multiple base units, the basis
Unit includes two sizes and all identical compression unit of structure, and the compression unit includes connection pillar and side supports column,
Side supports column both ends are fixed on the connection pillar midpoint, and the side supports column includes angled therebetween first tiltedly
Side and the second bevel edge, described two compression units are longitudinally mutually perpendicular to.
2. the three-dimensional metamaterial structure with zero Poisson's ratio according to claim 1, it is characterised in that: the super material of three-dimensional
Material structure is both horizontally and vertically stacked by multiple base units.
3. the three-dimensional metamaterial structure with zero Poisson's ratio according to claim 1, it is characterised in that: multiple bases
It is connected between unit by the connection pillar.
4. the three-dimensional metamaterial structure with zero Poisson's ratio according to claim 1, it is characterised in that: the super material of three-dimensional
Material structure is prepared by 3D printer.
5. the three-dimensional metamaterial structure with zero Poisson's ratio according to claim 1, it is characterised in that: the super material of three-dimensional
The material for expecting structure includes PLA consumptive material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109858167A (en) * | 2019-02-13 | 2019-06-07 | 五邑大学 | A kind of three-dimensional metamaterial structure with zero Poisson's ratio |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109858167A (en) * | 2019-02-13 | 2019-06-07 | 五邑大学 | A kind of three-dimensional metamaterial structure with zero Poisson's ratio |
| CN109858167B (en) * | 2019-02-13 | 2024-05-10 | 五邑大学 | Three-dimensional metamaterial structure with zero poisson ratio |
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