CN115325069A - Assembled concave negative Poisson's ratio metamaterial - Google Patents
Assembled concave negative Poisson's ratio metamaterial Download PDFInfo
- Publication number
- CN115325069A CN115325069A CN202210771383.7A CN202210771383A CN115325069A CN 115325069 A CN115325069 A CN 115325069A CN 202210771383 A CN202210771383 A CN 202210771383A CN 115325069 A CN115325069 A CN 115325069A
- Authority
- CN
- China
- Prior art keywords
- negative poisson
- ratio
- assembled
- concave negative
- claw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 210000000078 claw Anatomy 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 20
- 238000002360 preparation method Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000007906 compression Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0225—Cellular, e.g. microcellular foam
Abstract
The invention discloses an assembled type concave negative Poisson's ratio metamaterial which is formed by connecting a plurality of assembled type concave negative Poisson's ratio unit cells, wherein each assembled type concave negative Poisson's ratio unit cell consists of 6 four-claw components and 12 right-angle codes, the 6 four-claw components are matched with the 12 right-angle codes, the overall appearance is cubic after the assembled type concave negative Poisson's ratio unit cells are assembled through a bolt group, a three-dimensional concave negative Poisson's ratio unit cell is formed by connecting and fixing short bolt groups in an inner connection mode, and a space multi-level structure is formed by connecting a plurality of negative Poisson's ratio unit cells through a long bolt group. According to the invention, the negative Poisson ratio single cell is decomposed into 6 parts and 12 connecting pieces, and the negative Poisson ratio single cell and the spatial multi-level negative Poisson ratio structure are assembled in a mechanical connection mode, so that the limitation of processing equipment and process can be avoided, the preparation of the spatial multi-level negative Poisson ratio porous structure with controllable size and rich configuration can be realized on the premise of low cost, and the engineering applicability of the spatial multi-level negative Poisson ratio structure is improved.
Description
Technical Field
The invention belongs to the field of advanced manufacturing design, and particularly relates to design and preparation of an assembled concave negative Poisson's ratio metamaterial.
Background
Poisson's ratio is a measure of the poisson effect, i.e. the phenomenon that a material tends to expand in a direction perpendicular to the direction of compression, and is opposite to the negative poisson's ratio property, which is the property that a material expands laterally in the elastic range when stretched; while under compression, the material shrinks in the transverse direction. Compared with the traditional material structure, the negative Poisson ratio super-structure material has excellent mechanical properties such as shear resistance, impact resistance, fracture resistance, energy absorption and vibration isolation, permeability variable property, curved surface isotropy and the like, and has wide application prospect in the fields of aerospace, navigation, mechanical automation, biomedical treatment, national defense and military, textile industry and the like.
Due to the limitation of the additive manufacturing technology, many conventional negative poisson ratio structures cannot be prepared by the additive manufacturing technology due to the reasons that the support is difficult to remove, the processing size is limited and the like, and how to realize the additive manufacturing of the negative poisson ratio and reduce the cost is a great problem in realizing the wide application of the negative poisson ratio super-structural material; secondly, the mechanical property of the material is adjusted by the artificial structure design of the negative poisson ratio metamaterial, the size of the structure needs to be reduced as much as possible, and the negative poisson ratio metamaterial is closer to the property of the material.
Disclosure of Invention
In order to solve the limitation of the preparation method, the invention provides an assembled concave negative Poisson's ratio metamaterial, the function and the characteristic of the metamaterial are regulated and controlled by designing the configuration elements of a single cell and optimizing the geometric dimension, and the metamaterial has the characteristics of strong designability, stable structural performance and the like. Specifically, the concave negative Poisson ratio structure is decomposed into 6 four-claw components, each decomposed component can be prepared in large batch through traditional processes such as injection molding and stamping, mechanical assembly is carried out through a proper connecting piece to form a concave negative Poisson ratio unit cell, then a space multi-level assembled concave negative Poisson ratio structure is formed through matching connection between the unit cells, and the preparation of the space multi-level assembled concave negative Poisson ratio metamaterial with controllable size and rich configuration is realized under the production condition of low cost.
In order to achieve the technical effect, the invention provides an assembled type concave negative Poisson ratio metamaterial, wherein an assembled type concave negative Poisson ratio unit cell is formed by 6 four-jaw members and 12 right-angle codes, the 6 four-jaw members are in a cube after being matched, the right-angle codes are arranged on the inner sides of 12 connecting positions of the cube, and the four-jaw members and the right-angle codes are connected through short bolt sets to form the assembled type concave negative Poisson ratio unit cell.
The assembled type inner concave negative Poisson ratio super-structure material is formed by connecting a plurality of assembled type inner concave negative Poisson ratio unit cells which can be assembled, and the long bolt group replaces the short bolt group on the matching surface to realize the mutual connection among the plurality of assembled type inner concave negative Poisson ratio unit cells so as to form the space multi-level assembled type inner concave negative Poisson ratio super-structure material with controllable size and rich shape.
The side length of the outline of the external cube of the assembled type inward concave negative Poisson's ratio single cell is L, and the internal four-claw component is integrally claw-shaped and is formed by uniformly distributing 4 claw arms around the Z axis of a central shaft; the tail end of each claw arm is provided with a claw arm connector, each claw arm connector is provided with a mounting hole, the end part of each claw arm connector is provided with a matching surface, and the included angle of the matching surfaces is 45 degrees.
And according to the connection condition, the mounting hole is selectively set to be a through hole or a countersunk hole.
The angle between the claw arm and the Z axis is beta, and 35 degrees < beta <90 degrees is taken; the maximum external dimension of the four-claw component is L, and the cross section of the claw arm is set to be rectangular or polygonal.
The cross section of each claw arm is a rectangular cross section, and the width of each claw arm is 1/20 to 1/5L; the thickness is 1/20 to 1/5L.
The right-angle corner brace is provided with a connecting hole, the basic size of the connecting hole is ensured to meet the matching requirement between the four-claw components, the length and the height of the connecting hole are (1/15 to 1/5) L, and the width of the connecting hole is (1/20 to 1/5) L.
The four-claw components are matched through the matching surface of the end head of the claw arm connector, and are connected through a right-angle corner brace and a short bolt group to realize inline fixation so as to form a three-dimensional assembled type concave negative Poisson's ratio unit cell; the adjacent assembled type concave negative Poisson ratio single cells are connected by replacing the short bolt groups with the long bolt groups, so that the fixed connection of the adjacent assembled type concave negative Poisson ratio single cells is realized, and six surfaces of the assembled type concave negative Poisson ratio single cells can be connected.
The volume fraction of the assembled concave negative Poisson ratio unit cells is set to be 0.03 to 0.3, and a plurality of assembled concave negative Poisson ratio unit cells are fixedly connected through a long bolt group to form a spatial multi-level assembled concave negative Poisson ratio metamaterial with high void ratio.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the invention provides an assembled type concave negative Poisson ratio super-structure material, which is characterized in that according to the design idea of decomposition-assembly of configuration elements, a three-dimensional negative Poisson ratio structure is decomposed into a plurality of four-claw components, and then mechanical connection is carried out by matching with a right-angle code and a bolt group, so that a complete assembled type concave negative Poisson ratio unit cell is assembled. Compared with the manufacturing method of the porous structure with the complex configuration by adopting the 3D printing technology, the manufacturing method of the porous structure with the negative Poisson's ratio structure can process single parts in large batch by the traditional large-scale production processes such as injection molding, stamping and the like, and then assemble the parts in a mechanical connection mode, thereby greatly reducing the production cost of the negative Poisson's ratio structure and effectively improving the preparation efficiency of the porous structure.
2. The long bolt group replaces the short bolt group on the matching surface, so that the connection between the adjacent cells can be realized, the connection sequentially extends from point to line, from line to surface and from surface to body, the multi-level connection of a plurality of cells is realized, and a space array is formed. The four-claw component and the right-angle corner brace can be prepared in large batch by adopting the traditional processing technology, the technology is simple, the production cost is reduced, and the limit of processing size is eliminated.
3. Meanwhile, the assembled type concave negative Poisson ratio metamaterial provided by the invention can be matched with long and short bolt groups to realize the connection among a plurality of cells, so that a space multi-level assembled type concave negative Poisson ratio structure with controllable size and rich shape is formed. The limit of the manufacturable volume of the equipment is avoided, the preparation of a large-size and large-scale negative poisson ratio multi-level structure is easy to realize, and the engineering application range of the negative poisson ratio structure is greatly expanded.
4. In addition, the assembled type concave negative Poisson ratio single cell provided by the invention has small relative density, and the designed spatial multi-level concave negative Poisson ratio structure has controllable size and rich shape, and has excellent mechanical properties such as impact resistance, energy absorption and vibration isolation, permeability variability and the like.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a three-dimensional schematic view of a four-jaw member provided in an embodiment of the present invention.
Fig. 2 is a diagram of the relation of relevant basic sizes of a four-claw component provided by the embodiment of the invention.
Fig. 3 is a basic dimension diagram and a three-dimensional schematic diagram of a right-angle corner connector provided by an embodiment of the invention.
FIG. 4 is a basic size diagram of an assembled female negative Poisson's ratio cell assembled in the preferred embodiment 1 of the present invention.
FIG. 5 is a schematic diagram of an assembled concave negative Poisson's ratio cell assembled in the preferred embodiment 1 of the present invention.
FIG. 6 is a schematic diagram of a dual-unit assembled concave-negative Poisson-ratio cell according to the preferred embodiment 2 of the present invention.
FIG. 7 is a partial cross-sectional view of a two-part assembled female negative Poisson's ratio cell of the preferred embodiment 2 of FIG. 6 according to the present invention.
Fig. 8 is a schematic diagram of a spatial multi-level assembled concave negative poisson's ratio structure in the preferred embodiment 2 of the present invention.
Fig. 9 is a negative poisson's ratio effect diagram of the 4-step assembled concave negative poisson's ratio structure in the preferred embodiment 2 of the invention.
FIG. 10 is a schematic diagram of the axial compression loading and constraint set-up for finite element analysis in the preferred embodiment 3 of the present invention.
FIG. 11 is a trend graph of the configuration angle β -negative Poisson's ratio curve in the preferred embodiment 3 of the present invention.
In the figure: the structure comprises four-jaw components 1, right-angle corner connectors 2, short bolt groups 3, long bolt groups 4, assembled concave negative Poisson's ratio unit cells 5 and a spatial multi-level assembled concave negative Poisson's ratio metamaterial 8;
the claw arm comprises a claw arm 101, a claw arm connector 102, a mounting hole 103 and a matching surface 104;
and a connection hole 201.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
In order to more clearly illustrate the above objects, features and advantages of the present application, a detailed description of the present application is provided in this section in conjunction with the accompanying drawings. This application is capable of embodiments in addition to those described herein, and is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this application pertains and which fall within the limits of the appended claims. The protection scope of the present application shall be subject to the claims.
Example 1:
referring to fig. 1-8, an assembled type concave negative poisson ratio super-structure material is formed by connecting a plurality of assembled type concave negative poisson ratio unit cells 5 which can be assembled, each assembled type concave negative poisson ratio unit cell 5 is composed of 6 four-jaw members 1 and 12 right-angle codes 2, the 6 four-jaw members 1 are in a cube after being matched, the right-angle codes 2 are installed on the inner sides of 12 connecting positions of the cube, the four-jaw members 1 and the right-angle codes 2 are connected through short bolt groups 3 to form concave negative poisson ratio, the short bolt groups 3 on the matching surfaces are replaced through long bolt groups 4, the multiple assembled type concave negative poisson ratio unit cells 5 are connected with each other, and a space multi-level assembled type concave negative poisson ratio super-structure material 8 with controllable size and rich shape is formed. By adopting the structure, the connection between the adjacent cells can be realized, the cells sequentially extend from point to line, from line to surface and from surface to body, the multi-level connection of a plurality of cells is realized, and a space array is formed. The four-claw component and the right-angle corner brace can be prepared in large batch by adopting the traditional processing technology, the technology is simple, the production cost is reduced, and the limitation of processing size is eliminated. In addition, the designed assembled type concave negative Poisson's ratio single cell and the spatial multi-level concave negative Poisson's ratio structure have excellent mechanical properties such as anti-shearing performance, shock resistance, fracture resistance, energy absorption and vibration isolation, permeability variability and the like, and the engineering applicability is strong.
Furthermore, the side length of the outline of the external cube of the assembled type inward concave negative Poisson's ratio single cell 5 is L, the whole four-claw component 1 inside is claw-shaped and is formed by uniformly distributing 4 claw arms 101 around the axis Z of the central shaft; the tail end of the claw arm 101 is provided with a claw arm connector 102, the claw arm connector 102 is provided with a mounting hole 103, the end part of the claw arm connector 102 is provided with a matching surface 104, and the included angle of the matching surface 104 is 45 degrees; according to the connection condition, the mounting hole 103 is selectively set to be a through hole or a countersunk hole; the angle between the claw arm 101 and the Z axis is beta, and 35 degrees < beta <90 degrees is taken; the maximum external dimension of the four-claw member 1 is L, and the cross section of the claw arm 101 is set to be rectangular or polygonal; the cross section of the claw arm 101 is a rectangular cross section, and the width of the claw arm 101 is 1/20 to 1/5L; the thickness is taken to be (1/20 to 1/5) L.
Furthermore, a connecting hole 201 is formed in the right-angle corner connector 2, the basic size of the connecting hole ensures that the matching requirement between the four-claw components 1 is met, the length and the height of the connecting hole are (1/15 to 1/5) L, the width of the connecting hole is consistent with the width of the claw arm 101, and the width of the connecting hole is (1/20 to 1/5) L.
Furthermore, the four-claw components 1 are matched through a matching surface 104 at the end of a claw arm connector 102, and are connected through a right-angle corner connector 2 and a short bolt group 3 to realize inline fixation so as to form a three-dimensional assembled type concave negative Poisson's ratio single cell 5; the long bolt groups 4 replace the short bolt groups 3 to connect the adjacent assembled type concave negative Poisson's ratio unit cells 5, the fixed connection of the adjacent assembled type concave negative Poisson's ratio unit cells 5 is realized, and six surfaces of the assembled type concave negative Poisson's ratio unit cells 5 can be connected.
Furthermore, the volume fraction of the assembled type inward concave negative Poisson ratio unit cells 5 is set to be 0.03 to 0.3, and the plurality of assembled type inward concave negative Poisson ratio unit cells 5 are fixedly connected through the bolt groups to form a space multi-level assembled type inward concave negative Poisson ratio metamaterial 8 with high void ratio.
Example 2:
referring to fig. 1-5, the assembled concave negative poisson's ratio metamaterial provided by the invention is composed of 6 four-claw members 1, 12 right-angle corner connectors 2 and a bolt group 3.
Furthermore, the four-claw component 1 is in a claw shape and is formed by 4 claw arms which are uniformly distributed around a central shaft, mounting holes are formed in the joints of the claw arms, the joints can be set to be through holes or countersunk holes according to connection conditions, and matching surfaces are arranged at the end parts of the joints of the claw arms.
Further, the angle between the claw arm of four claw components and the axis is beta, takes 45 °, and the interval of axisymmetric claw arm is L, takes 60mm, and the claw arm cross section can set up to rectangle or polygon, and example 2 chooses the rectangle cross section for use, and L/15 is got to the width of claw arm and is ridden 4mm, and L/15 is got to thickness and is ridden 3mm.
Furthermore, a connecting hole is formed in the right-angle corner brace, the length and the height of the connecting hole are both L/10=6mm, the width of the connecting hole is consistent with the width of the arm lever, and L/15=4mm is taken.
Furthermore, the four-claw components are matched through matching surfaces of connectors of the four-claw components, and are connected through right-angle corner connectors and short bolt groups to realize in-line fixation to form a three-dimensional assembled type concave negative Poisson's ratio unit cell 5, as shown in fig. 5.
Example 3:
referring to fig. 6-9, in order to improve the spatial hierarchy and rich configuration of the assembled concave negative poisson's ratio structure, the connection mode of the assembled concave negative poisson's ratio unit cell can be adjusted.
Specifically, as illustrated in example 1, a plurality of assembled negative poisson ratio cells are assembled, and adjacent cells are connected by long bolt sets to form a duplex cell assembly, as shown in fig. 6.
Further, by means of the ideas of point-to-line, line-to-surface and surface-to-body, a spatial multi-level assembled concave negative poisson's ratio structure is gradually formed, as shown in fig. 8, and the mechanical properties such as energy absorption and impact resistance of the assembled negative poisson's ratio structure are improved.
Further, the Z-axis deformation is applied to the 4-order assembled concave negative Poisson ratio structure by utilizing finite element software analysisε z =2.4mm, the negative Poisson ratio was observedThe effect is shown in fig. 9.
Example 4:
referring to fig. 10-11, to further illustrate the influence of the structural parameters of the assembled concave negative poisson ratio on the negative poisson effect, finite element analysis is performed on a plurality of assembled concave negative poisson ratio units with different configuration angles beta.
Further, in finite element analysis, the given size of the structure is L =60 mm, the volume fraction of the assembled concave negative poisson's ratio unit cell is about 0.04 to 0.05, the material of the structure is defined as nylon PA2000, and the properties of the material are as follows: the density is 1020kg/m 3 The modulus of elasticity is 741MPa, and the Poisson's ratio is 0.3.
Further, FIG. 10 shows axial compression and simple support constraint of negative Poisson's ratio cell during finite element analysis, the axial compression being applied to the upper surface of the assembled concave negative Poisson's ratio cell, Z-axial compressionε z =0.6, said simple-supported constraint being applied to the lower surface of the cell.
Further, a configuration angle-negative poisson's ratio effect curve is drawn, as shown in fig. 11, the negative poisson effect of the assembled concave negative poisson's ratio unit cell with different configuration angles is observed. According to finite element analysis, the negative Poisson ratio effect of the negative Poisson ratio unit cell shows a change trend of increasing and then decreasing with the increase of the configuration angle beta.
In conclusion, the assembled concave negative Poisson's ratio metamaterial designed by the invention has the excellent performances of easy manufacture, easy adjustment of configuration, light weight, impact resistance and the like.
Claims (9)
1. The assembled type inward-concave negative Poisson's ratio unit cell is characterized in that the assembled type inward-concave negative Poisson's ratio unit cell (5) is composed of 6 four-claw components (1) and 12 right-angle codes (2), the 6 four-claw components (1) are matched to form a cube, the right-angle codes (2) are installed on the inner sides of 12 connecting positions of the cube, and the four-claw components (1) and the right-angle codes (2) are connected through short bolt groups (3) to form the assembled type inward-concave negative Poisson's ratio unit cell.
2. An assembled type concave negative Poisson ratio super-structure material formed by the assembled type concave negative Poisson ratio unit cells of claim 1 is characterized in that the assembled type concave negative Poisson ratio super-structure material is formed by connecting a plurality of assembled type concave negative Poisson ratio unit cells (5) which can be assembled, the short bolt groups (3) on the matching surfaces are replaced by long bolt groups (4), the plurality of assembled type concave negative Poisson ratio unit cells (5) are connected with one another, and a space multi-level assembled type concave negative Poisson ratio super-structure material (8) with controllable size and rich shape is formed.
3. The assembled type invaginated negative Poisson's ratio metamaterial according to claim 2, characterized in that the assembled type invaginated negative Poisson's ratio unit cell (5) has an outline side length of L in the shape of cube, the four-claw member (1) inside is claw-shaped as a whole, and is formed by 4 claw arms (101) uniformly distributed around the axis Z of the central shaft; the tail end of the claw arm (101) is provided with a claw arm connector (102), the claw arm connector (102) is provided with a mounting hole (103), the end part of the claw arm connector (102) is provided with a matching surface (104), and the included angle of the matching surface (104) is 45 degrees.
4. An assembled female negative poisson's ratio metamaterial according to claim 3, wherein the mounting holes (103) are selectively configured as through holes or counter bores depending on the connection.
5. An assembled female negative poisson's ratio metamaterial according to claim 3, characterized in that the angle between the claw arm (101) and the Z-axis is β, taking 35 ° < β <90 °; the maximum external dimension of the four-claw component (1) is L, and the cross section of the claw arm (101) is set to be rectangular or polygonal.
6. The assembled female negative Poisson's ratio metamaterial according to claim 4, wherein the cross section of the claw arm (101) is a rectangular cross section, and the width of the claw arm (101) is (1/20 to 1/5) L; the thickness is taken to be (1/20 to 1/5) L.
7. The assembled type inner concave negative Poisson's ratio super-structural material as claimed in claim 1 or 2, wherein a connecting hole (201) is formed in the right-angle corner connector (2), the basic size of the connecting hole ensures that the matching requirement between the four-claw components (1) is met, the length and the height of the connecting hole are (1/15 to 1/5) L, and the width of the connecting hole is (1/20 to 1/5) L.
8. The assembled inward concave negative Poisson's ratio super-structural material according to claim 3, characterized in that the four-claw components (1) are matched through a matching surface (104) at the end of a claw arm connector (102), and are connected through a right-angle corner connector (2) and a short bolt group (3) to realize in-line fixation to form a three-dimensional assembled inward concave negative Poisson's ratio unit cell (5); the adjacent assembled type concave negative Poisson ratio unit cells (5) are connected by replacing the short bolt groups (3) with the long bolt groups (4), the fixed connection of the adjacent assembled type concave negative Poisson ratio unit cells (5) is realized, and six faces of the assembled type concave negative Poisson ratio unit cells (5) can be connected.
9. The assembled concave negative Poisson ratio metamaterial according to claim 1 or 2, wherein the volume fraction of the assembled concave negative Poisson ratio unit cells (5) is set to be 0.03 to 0.3, and a plurality of assembled concave negative Poisson ratio unit cells (5) are fixedly connected through a long bolt group to form a spatial multi-level assembled concave negative Poisson ratio metamaterial (8) with high porosity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210771383.7A CN115325069A (en) | 2022-07-02 | 2022-07-02 | Assembled concave negative Poisson's ratio metamaterial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210771383.7A CN115325069A (en) | 2022-07-02 | 2022-07-02 | Assembled concave negative Poisson's ratio metamaterial |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115325069A true CN115325069A (en) | 2022-11-11 |
Family
ID=83917967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210771383.7A Pending CN115325069A (en) | 2022-07-02 | 2022-07-02 | Assembled concave negative Poisson's ratio metamaterial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115325069A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980074922A (en) * | 1997-03-27 | 1998-11-05 | 이서봉 | Cell structures |
| JP2006336373A (en) * | 2005-06-03 | 2006-12-14 | Misawa Homes Co Ltd | Corner part protective member |
| CN206346414U (en) * | 2016-12-15 | 2017-07-21 | 浙江亚厦装饰股份有限公司 | A kind of monoblock type external corner structure |
| CN108082102A (en) * | 2018-01-24 | 2018-05-29 | 南京理工大学 | Negative Poisson ratio structural component based on indent hexagonal cells |
| FR3071290A1 (en) * | 2017-09-19 | 2019-03-22 | Centre National D'etudes Spatiales | AUXETICAL SHOCK |
| CN109878443A (en) * | 2019-03-12 | 2019-06-14 | 南京理工大学 | Energy-absorption box based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core |
| CN211714949U (en) * | 2019-11-28 | 2020-10-20 | 广东锋盾防火科技有限公司 | Window frame fixing assembly |
| CN212479796U (en) * | 2020-07-07 | 2021-02-05 | 唐腊辉 | Cabinet assembling and connecting structure |
| CN215168442U (en) * | 2021-04-15 | 2021-12-14 | 肇庆科达轻钢房屋系统有限公司 | Connect angle sign indicating number and open container room inclines |
-
2022
- 2022-07-02 CN CN202210771383.7A patent/CN115325069A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980074922A (en) * | 1997-03-27 | 1998-11-05 | 이서봉 | Cell structures |
| JP2006336373A (en) * | 2005-06-03 | 2006-12-14 | Misawa Homes Co Ltd | Corner part protective member |
| CN206346414U (en) * | 2016-12-15 | 2017-07-21 | 浙江亚厦装饰股份有限公司 | A kind of monoblock type external corner structure |
| FR3071290A1 (en) * | 2017-09-19 | 2019-03-22 | Centre National D'etudes Spatiales | AUXETICAL SHOCK |
| CN108082102A (en) * | 2018-01-24 | 2018-05-29 | 南京理工大学 | Negative Poisson ratio structural component based on indent hexagonal cells |
| CN109878443A (en) * | 2019-03-12 | 2019-06-14 | 南京理工大学 | Energy-absorption box based on interior concave polyhedron negative poisson's ratio three-dimensional structure inner core |
| CN211714949U (en) * | 2019-11-28 | 2020-10-20 | 广东锋盾防火科技有限公司 | Window frame fixing assembly |
| CN212479796U (en) * | 2020-07-07 | 2021-02-05 | 唐腊辉 | Cabinet assembling and connecting structure |
| CN215168442U (en) * | 2021-04-15 | 2021-12-14 | 肇庆科达轻钢房屋系统有限公司 | Connect angle sign indicating number and open container room inclines |
Non-Patent Citations (2)
| Title |
|---|
| 任鑫;张相玉;谢亿民;: "负泊松比材料和结构的研究进展", 力学学报, no. 03, 21 January 2019 (2019-01-21) * |
| 杜义贤，李荣，徐明等: "负泊松比微结构拓扑优化设计", 工程设计学报, vol. 25, no. 4, 31 August 2018 (2018-08-31), pages 450 - 456 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113719742B (en) | Assembled high-bearing-capacity periodic porous structure | |
| CN112100752B (en) | Structural unit for forming lattice gradient porous structure and gradient porous material | |
| CN108953443B (en) | Concave octagonal cubic lattice sandwich plate structure | |
| CN104271853B (en) | There is the support frame connecting node | |
| CN114038518B (en) | Reinforced negative-rigidity metamaterial structure | |
| CN110705093B (en) | Lightweight lattice structure parametric modeling and data lightweight processing method | |
| CN114741811A (en) | Variable-rigidity three-dimensional concave negative Poisson ratio cell element and design method thereof | |
| CN115325069A (en) | Assembled concave negative Poisson's ratio metamaterial | |
| CN109766638B (en) | Fuel nozzle and lightweight design method thereof | |
| CN114523662B (en) | Three-dimensional metamaterial functional component and manufacturing method thereof | |
| CN114439873B (en) | Assembled periodic octahedral truss lattice structure | |
| CN110043787A (en) | A kind of round tube and its design method of the variation of axially loaded tube wall | |
| CN110457841A (en) | A method of characterization 3D printing diamond lattice structure mechanical property | |
| CN113983096A (en) | Bending leading type compression spring type lattice structure | |
| CN114818167A (en) | Filling method of lattice cell structure part | |
| CN115059867A (en) | Nested discrete assembly machinery metamaterial | |
| CN111969327A (en) | Deformation-designable and non-contact-controllable two-dimensional mechanical metamaterial | |
| CN211710200U (en) | Polygonal structural component and sandwich panel | |
| CN101126428A (en) | Beam type tridirectional vibration separator | |
| CN215928100U (en) | Engine connecting rod and engine | |
| CN220791361U (en) | Cushion block assembly | |
| CN213361857U (en) | Grid structure based on product lightweight | |
| CN220470524U (en) | Novel zero poisson ratio lattice structure for improving mechanical property | |
| CN114294364B (en) | Three-dimensional dome-shaped negative stiffness structure and preparation method thereof | |
| CN218409512U (en) | Novel lattice structure based on I-beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |