CN109798311A - The adjustable negative poisson's ratio structure of performance - Google Patents
The adjustable negative poisson's ratio structure of performance Download PDFInfo
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- CN109798311A CN109798311A CN201910131488.4A CN201910131488A CN109798311A CN 109798311 A CN109798311 A CN 109798311A CN 201910131488 A CN201910131488 A CN 201910131488A CN 109798311 A CN109798311 A CN 109798311A
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- 238000000034 method Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000010146 3D printing Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Abstract
The present invention relates to structure-design technique fields, specifically disclose a kind of adjustable negative poisson's ratio structure of performance, it is characterized in that, including multiple negative poisson's ratio units, the negative poisson's ratio unit includes four submissive curved-beam elements and four connectors, the connector is the cuboid that is square of section, four connectors are symmetrical and two adjacent connectors between by the submissive curved-beam element connection, the end of the curved beam compliance unit is connect with the end of the connector inner side edge.The present invention solves the problems, such as that negative poisson's ratio structure in the prior art single direction stress deformation and can only can not adjust structural behaviour.
Description
Technical field
The present invention relates to structure-design technique field more particularly to a kind of adjustable negative poisson's ratio structures of performance.
Background technique
Negative poisson's ratio structure is also known as auxetic structure, and structure vertical is expanded in direction of pull when showing as tension, compression
When shunk perpendicular to pressure direction, therefore, this structure has higher compression impedance, resistance to compression trace ability, shear resistance, and has
Effect reduces stress concentration phenomenon, has broad application prospects, such as the vibration-absorptive material of rocket in space industry, rocket or aircraft
Radome fairing, as resistance to plucking goes out auxetic bone nail in medical field, some bullet resistant materials etc. in military field.
The knot that existing negative poisson's ratio structure has double-head arrow type structure and classical concave inward structure to combine with double-head arrow structure
Structure can only realize single direction stress deformation, in stress although the design of these negative poisson's ratio structures has negative poisson's ratio characteristic
In more complex environment and it is not suitable for.In addition, these negative poisson's ratio structures can only change cell configuration by experience, it is whole to change
Body structural behaviour can not be calculated quantitatively.
Summary of the invention
The object of the present invention is to provide a kind of adjustable negative poisson's ratio structures of performance, to overcome negative Poisson in the prior art
It can only single direction stress deformation and the problem of structural behaviour can not be adjusted than structure.
In order to solve the above-mentioned technical problems, the present invention provides a kind of adjustable negative poisson's ratio structure of performance, including it is multiple
Negative poisson's ratio unit, the negative poisson's ratio unit include four submissive curved-beam elements and four connectors, and the connector is to cut
The cuboid that face is square, four connectors are symmetrical and two adjacent connectors between pass through the submissive curved beam list
Member connection, the end of the curved beam compliance unit is connect with the end of the medial surface of the connector.
Preferably, planar periodic arrangement combines multiple negative poisson's ratio units.
Preferably, the submissive curved-beam element is generated by nurbs curve Modeling and Design.
Preferably, the ratio between the submissive curved-beam element thickness and height are 1:6.
Preferably, the ratio between the length of the connector and the side length of its square section are 4:1.
Preferably, the height of the flexible curved-beam element is equal with the side length of the square section of the connector.
Preferably, the adjustable negative poisson's ratio structure of the performance utilizes 3D printing technique, selects TPU material integration system
It makes.
Performance of the invention adjustable negative poisson's ratio structure expands when having tension perpendicular to direction of pull, when compression
Perpendicular to the characteristic that pressure direction is shunk, the curved-beam element in negative poisson's ratio structure can be in the design process according to practical structures
The demand of performance carries out quantitative adjusting, has good adaptability, and deformation having the same is special in plane X, Y-direction
Property, this negative poisson's ratio structure all has negative poisson's ratio characteristic in plane both direction, and structure is full symmetric, at two, plane
Mechanical property is identical on direction, in specific actual application, is adapted to complex loading conditions, can be with NURBS song
Line models submissive curved beam, can quantitatively change its mechanical property by changing curved beam shape, and then change overall structure performance,
Strong flexibility can satisfy the design requirement of various conditions, realize the adjustability of performance, using submissive curved-beam element, have
Small in concentrated stress, from fretting wear, the advantages that moving steadily and be convenient for energy storage conversion, service performance is excellent.
Detailed description of the invention
Fig. 1 is the structural representation of the submissive curved-beam element for the negative poisson's ratio structure that the performance tolerance of the embodiment of the present invention is jumped
Figure；
Fig. 2 is the structural representation of the negative poisson's ratio unit for the negative poisson's ratio structure that the performance tolerance of the embodiment of the present invention is jumped
Figure；
Fig. 3 is the structural schematic diagram for the negative poisson's ratio structure that the performance tolerance of the embodiment of the present invention is jumped；
Fig. 4 is the stress diagram for the negative poisson's ratio structure that the performance tolerance of the embodiment of the present invention is jumped.
In figure, 1: submissive curved-beam element；2: connector.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment is used for
Illustrate the present invention, but cannot be used to limit the scope of the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or two
More than.
As shown in Figure 1-3, the adjustable negative poisson's ratio structure of the performance of the present embodiment includes: multiple negative poisson's ratio units, bear
Poisson's ratio unit includes four submissive curved-beam elements 1 and four connectors 2, and connector 2 is the cuboid that is square of section, and four
A connector 2 is symmetrical and two adjacent connectors 2 between connected by submissive curved-beam element 1, curved beam compliance unit 1
End is connect with the end of the medial surface of connector 2.Planar periodic arrangement combines multiple negative poisson's ratio units, becomes negative
Poisson's ratio structure.
Being generated by nurbs curve tectonic model shape function Modeling and Design for submissive curved-beam element 1, can sit according to control point
The shape for marking accurate description curved beam, carries out finite element solving according to shape function and obtains stiffness matrix, carries out quantitative analysis to curved beam,
Change the shape of curved beam by changing control point coordinates, and then changes its mechanical property.
The ratio between submissive 1 thickness of curved-beam element and height are 1:6, wherein with a thickness of the size of horizontal direction in plane, height
For the size of vertical direction in plane, this ratio can guarantee the nyctitropic flexibility of its planar shaped and perpendicular to plane deformation side
To rigidity.The ratio between length and the side length of its square section of connector 2 are 4:1.The height and connection of flexible curved-beam element 1
The side length of the square section of body 2 is equal.
The adjustable negative poisson's ratio structure of performance in this fact Example utilizes 3D printing technique, selects TPU material integration system
It makes.
As shown in figure 4, the working principle and the course of work of the adjustable negative poisson's ratio structure of the performance of the present embodiment are as follows: to negative
Poisson's ratio structure applies Y-direction constraint below, if applying Y-direction pressure to top, deformation occurs for the submissive curved beam of inside configuration, knot
Structure is whole to be presented contraction state in the x direction and the y direction, if applying Y-direction pulling force to top, structure is whole in X-direction and the side Y
To swelling state is presented, that is, there is negative poisson's ratio characteristic.Since structure is in full symmetric state, can also apply in X-direction
Load.
Performance of the invention adjustable negative poisson's ratio structure expands when having tension perpendicular to direction of pull, when compression
Perpendicular to the characteristic that pressure direction is shunk, the curved-beam element in negative poisson's ratio structure can be in the design process according to practical structures
The demand of performance carries out quantitative adjusting, has good adaptability, and deformation having the same is special in plane X, Y-direction
Property, this negative poisson's ratio structure all has negative poisson's ratio characteristic in plane both direction, and structure is full symmetric, at two, plane
Mechanical property is identical on direction, in specific actual application, is adapted to complex loading conditions, can be with NURBS song
Line models submissive curved beam, can quantitatively change its mechanical property by changing curved beam shape, and then change overall structure performance,
Strong flexibility can satisfy the design requirement of various conditions, realize the adjustability of performance, using submissive curved-beam element, have
Small in concentrated stress, from fretting wear, the advantages that moving steadily and be convenient for energy storage conversion, service performance is excellent.
The embodiment of the present invention is given for the purpose of illustration and description, and is not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Selecting and describe embodiment is and to make those skilled in the art to more preferably illustrate the principle of the present invention and practical application
It will be appreciated that the present invention is to design various embodiments suitable for specific applications with various modifications.
Claims (7)
1. a kind of adjustable negative poisson's ratio structure of performance, which is characterized in that including multiple negative poisson's ratio units, the negative poisson's ratio
Unit includes four submissive curved-beam elements and four connectors, and the connector is the cuboid that section is square, four companies
Junctor is symmetrical and two adjacent connectors between connected by the submissive curved-beam element, the curved beam compliance unit
End is connect with the end of the medial surface of the connector.
2. the adjustable negative poisson's ratio structure of performance according to claim 1, which is characterized in that multiple negative poisson's ratio units exist
The arrangement combination of plane periodically.
3. the adjustable negative poisson's ratio structure of performance according to claim 1, which is characterized in that the submissive curved-beam element
It is generated by nurbs curve Modeling and Design.
4. the adjustable negative poisson's ratio structure of performance according to claim 1, which is characterized in that the submissive curved-beam element is thick
The ratio between degree and height are 1:6.
5. the adjustable negative poisson's ratio structure of performance according to claim 1, which is characterized in that the length of the connector with
The ratio between side length of its square section is 4:1.
6. the adjustable negative poisson's ratio structure of performance according to claim 1, which is characterized in that the flexibility curved-beam element
Height is equal with the side length of the square section of the connector.
7. the adjustable negative poisson's ratio structure of performance described in any one of -6 according to claim 1, which is characterized in that the property
The adjustable negative poisson's ratio structure of energy utilizes 3D printing technique, and TPU material is selected to be integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910131488.4A CN109798311A (en) | 2019-02-22 | 2019-02-22 | The adjustable negative poisson's ratio structure of performance |
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| CN201910131488.4A CN109798311A (en) | 2019-02-22 | 2019-02-22 | The adjustable negative poisson's ratio structure of performance |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518160A (en) * | 2019-07-15 | 2019-11-29 | 南京航空航天大学 | A kind of shock-absorbing heat dissipation batteries of electric automobile based on negative poisson's ratio material |
| CN112012983A (en) * | 2020-09-12 | 2020-12-01 | 长沙理工大学 | Negative Poisson ratio flexible buffering hydraulic cylinder |
| CN112252507A (en) * | 2020-10-15 | 2021-01-22 | 中国人民解放军军事科学院国防科技创新研究院 | Negative Poisson ratio structure based on flexible hinge |
| CN114783300A (en) * | 2022-05-30 | 2022-07-22 | 武汉华星光电半导体显示技术有限公司 | Flexible display module |
| CN115419670A (en) * | 2022-07-21 | 2022-12-02 | 武汉科技大学 | X-type negative Poisson's ratio honeycomb structure |
| CN115419670B (en) * | 2022-07-21 | 2024-05-17 | 武汉科技大学 | X-shaped negative poisson ratio honeycomb structure |
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| JPH10134102A (en) * | 1996-10-30 | 1998-05-22 | Toyota Central Res & Dev Lab Inc | Manufacture of compound material with desired poisson ratio |
| CN102720785A (en) * | 2012-05-29 | 2012-10-10 | 北京航空航天大学 | Internally hollow metal rubber vibration isolator with negative Poisson's ratio characteristic |
| CN104157186A (en) * | 2014-07-30 | 2014-11-19 | 华南理工大学 | Grid structure with zero Poisson ratio and compression method thereof |
| KR101682992B1 (en) * | 2015-11-04 | 2016-12-06 | 전남대학교산학협력단 | Auxetic structure based on wire-woven metal and fabrication method and appratus of the same |
| CN106184085A (en) * | 2016-06-30 | 2016-12-07 | 南京航空航天大学 | A kind of closed loop negative poisson's ratio construction car security system and method for designing |
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| CN108953443A (en) * | 2018-07-17 | 2018-12-07 | 中国人民解放军海军工程大学 | Indent octagon cubic lattice Sandwich Plates |
| CN209654492U (en) * | 2019-02-22 | 2019-11-19 | 大连交通大学 | The adjustable negative poisson's ratio structure of performance |
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2019
- 2019-02-22 CN CN201910131488.4A patent/CN109798311A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10134102A (en) * | 1996-10-30 | 1998-05-22 | Toyota Central Res & Dev Lab Inc | Manufacture of compound material with desired poisson ratio |
| CN102720785A (en) * | 2012-05-29 | 2012-10-10 | 北京航空航天大学 | Internally hollow metal rubber vibration isolator with negative Poisson's ratio characteristic |
| CN104157186A (en) * | 2014-07-30 | 2014-11-19 | 华南理工大学 | Grid structure with zero Poisson ratio and compression method thereof |
| KR101682992B1 (en) * | 2015-11-04 | 2016-12-06 | 전남대학교산학협력단 | Auxetic structure based on wire-woven metal and fabrication method and appratus of the same |
| CN106184085A (en) * | 2016-06-30 | 2016-12-07 | 南京航空航天大学 | A kind of closed loop negative poisson's ratio construction car security system and method for designing |
| CN106541568A (en) * | 2016-10-31 | 2017-03-29 | 常州工学院 | A kind of three-dimensional negative poisson's ratio periodic porous material and preparation method thereof |
| CN106712657A (en) * | 2016-11-22 | 2017-05-24 | 中国地质大学（武汉） | Photovoltaic-piezoelectric power generation type honeycomb sandwich composite board |
| CN108953443A (en) * | 2018-07-17 | 2018-12-07 | 中国人民解放军海军工程大学 | Indent octagon cubic lattice Sandwich Plates |
| CN209654492U (en) * | 2019-02-22 | 2019-11-19 | 大连交通大学 | The adjustable negative poisson's ratio structure of performance |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518160A (en) * | 2019-07-15 | 2019-11-29 | 南京航空航天大学 | A kind of shock-absorbing heat dissipation batteries of electric automobile based on negative poisson's ratio material |
| CN112012983A (en) * | 2020-09-12 | 2020-12-01 | 长沙理工大学 | Negative Poisson ratio flexible buffering hydraulic cylinder |
| CN112252507A (en) * | 2020-10-15 | 2021-01-22 | 中国人民解放军军事科学院国防科技创新研究院 | Negative Poisson ratio structure based on flexible hinge |
| CN114783300A (en) * | 2022-05-30 | 2022-07-22 | 武汉华星光电半导体显示技术有限公司 | Flexible display module |
| CN115419670A (en) * | 2022-07-21 | 2022-12-02 | 武汉科技大学 | X-type negative Poisson's ratio honeycomb structure |
| CN115419670B (en) * | 2022-07-21 | 2024-05-17 | 武汉科技大学 | X-shaped negative poisson ratio honeycomb structure |
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