CN114962508B - Shock attenuation board pole structure with negative poisson's ratio - Google Patents
Shock attenuation board pole structure with negative poisson's ratio Download PDFInfo
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- CN114962508B CN114962508B CN202210672890.5A CN202210672890A CN114962508B CN 114962508 B CN114962508 B CN 114962508B CN 202210672890 A CN202210672890 A CN 202210672890A CN 114962508 B CN114962508 B CN 114962508B
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- negative poisson
- truss
- shock absorbing
- rotator
- rod structure
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- 230000035939 shock Effects 0.000 title claims description 16
- 230000000737 periodic effect Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000013016 damping Methods 0.000 abstract description 6
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004215 lattice model Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910003407 AlSi10Mg Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
-
- 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
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
-
- 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
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
-
- 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
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/42—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing
- F16F1/44—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing loaded mainly in compression
-
- 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
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/42—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing
- F16F1/46—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing loaded mainly in tension
-
- 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 a shock-absorbing plate rod structure with negative poisson ratio, which comprises trusses and rhombic rotators, wherein each truss comprises a periodic unit, each periodic unit is of a nearly concave hexagonal structure, each group of nearly concave hexagonal structures of each periodic unit comprises a cross rod and inclined rods, the inclined rods are symmetrically arranged at two ends of the cross rod and are positioned at the same side, the rhombic rotators are arranged on the cross rod between the inclined rods at the same side, the trusses are arranged at the upper side and the lower side of each rhombic rotator, the two groups of trusses are arranged in parallel, and the trusses and the rhombic rotators are alternately arranged; the plate rod structure of the invention is loose and porous, has good negative poisson ratio performance, can absorb energy when being subjected to external vibration within the elastic limit, and achieves good damping effect.
Description
Technical Field
The invention relates to the technical field of metamaterial, in particular to a damping plate rod structure with negative poisson ratio.
Background
The Poisson ratio of the material in the nature is mostly positive, the phenomenon of shrinkage when stretching or expansion when compressing is shown, and the negative Poisson ratio material has the opposite characteristics, namely, the characteristics of pulling-expanding and compressing, the negative Poisson ratio material and structure have great advantages in the aspects of shearing resistance, fracture resistance, energy absorption performance and the like, and the metamaterial with the negative Poisson ratio effect generally has the physical characteristics of light weight, high damping, sound absorption, heat insulation and the like;
the negative poisson ratio material has wide application, is related to the fields of aviation, aerospace, medical treatment, electronics and the like, has great significance for the development of the fields of aerospace, semiconductor devices, optical elements, precision instruments, building materials and the like, and expands outwards to absorb more energy when being bent, so that the negative poisson ratio material absorbs shock, thereby playing a role in protection;
the traditional negative poisson ratio structure is an inward concave polygon structure, a star-shaped structure, a chiral structure and a honeycomb structure, the structures have insufficient performances in the aspect of inclined rods, and meanwhile, the inclined rods are blocked by the vertical rods to a certain extent, so that the rotation capacity of the inclined rods is weakened, and therefore, the invention provides a damping plate rod structure with the negative poisson ratio to solve the problems in the prior art.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a shock absorbing plate lever structure with a negative poisson's ratio.
In order to achieve the purpose of the invention, the invention is realized by the following technical scheme: the utility model provides a shock attenuation board pole structure with negative poisson ratio, includes truss and rhombus rotator, the truss includes periodic unit, periodic unit is nearly indent hexagon structure, every group periodic unit's nearly indent hexagon structure contains horizontal pole and diagonal bar, diagonal bar symmetry is at horizontal pole both ends and be located the homonymy, homonymy be equipped with the rhombus rotator on the horizontal pole between the diagonal bar, the rhombus rotator upside all is equipped with truss and two sets of truss parallel arrangement, truss and rhombus rotator alternate arrangement setting.
The further improvement is that: the truss and diamond rotator are made of one of metal, PLA consumable, carbon fiber and composite material, and are manufactured through a 3D printing technology.
The further improvement is that: the distance between the truss inlet cross bars at the upper side and the lower side of the diamond-shaped rotator is 6L, the distance between the truss inlet cross bars at the far side is 8L, the length of the truss upper cross bar is 6L, and the lengths of the two groups of diagonal bars areThe included angle between the inclined rod and the cross rod is 135 degrees, and the diamond-shaped rotary rod is provided with a plurality of groovesThe rotor side length is 5L, the included angle of the connection part of the rhombic rotary sub-bevel edge and the cross bar is 45 degrees, wherein L is a size coefficient.
The further improvement is that: and (3) carrying out simulation experiments by adopting Abaqus simulation software, verifying a negative Poisson ratio lattice model, carrying out data processing by the software, and calculating a Poisson ratio-time curve after data are derived.
The further improvement is that: before simulation, the Abaqus simulation software is adopted to build a virtual model by utilizing SolidWorks, material parameters are set in the Abaqus simulation software, then load parameters, compression parameters and finite element grids are set, and simulation calculation is carried out.
The beneficial effects of the invention are as follows: the plate rod structure of the invention is loose and porous, has good negative poisson ratio performance, can absorb energy when being subjected to external vibration within the elastic limit, and achieves good damping effect.
Drawings
FIG. 1 is a diagram of the truss and diamond-shaped rotor distribution structure of example 1 of the present invention.
Fig. 2 is a diagram showing a periodic unit structure according to embodiment 1 of the present invention.
FIG. 3 is a graph showing the true stress and plastic strain of AlSi10Mg according to example 2 of the present invention.
Fig. 4 is a poisson's ratio versus time graph of the plate and rod structure of example 2 of the present invention.
Fig. 5 is a graph of poisson's ratio versus time for the conventional model of example 2 of the present invention.
Detailed Description
The present invention will be further described in detail with reference to the following examples, which are only for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1
According to the shock-absorbing plate rod structure with negative poisson ratio, which is shown in fig. 1 and 2, the shock-absorbing plate rod structure with negative poisson ratio comprises trusses and diamond-shaped rotators, each truss comprises periodic units, each periodic unit is of a nearly concave hexagonal structure, each group of nearly concave hexagonal structure of each periodic unit comprises a cross rod and inclined rods, the inclined rods are symmetrically arranged at two ends of the cross rods and are positioned at the same side, the diamond-shaped rotators are arranged on the cross rods between the inclined rods at the same side, the trusses are arranged on the upper side and the lower side of each diamond-shaped rotator, the trusses are arranged in parallel, and the trusses and the diamond-shaped rotators are alternately arranged.
The truss and diamond rotator are made of one of metal, PLA consumable, carbon fiber and composite material, and are manufactured through a 3D printing technology.
The distance between the truss inlet cross bars at the upper side and the lower side of the diamond-shaped rotator is 6L, the distance between the truss inlet cross bars at the far side is 8L, the length of the truss upper cross bar is 6L, and the lengths of the two groups of diagonal bars areThe included angle between the inclined rod and the cross rod is 135 degrees, the side length of the diamond-shaped rotating sub-is 5L, and the included angle at the joint of the inclined edge of the diamond-shaped rotating sub-and the cross rod is 45 degrees, wherein L is a size coefficient.
And (3) carrying out simulation experiments by adopting Abaqus simulation software, verifying a negative Poisson ratio lattice model, carrying out data processing by the software, and calculating a Poisson ratio-time curve after data are derived.
Before simulation, the Abaqus simulation software is adopted to build a virtual model by utilizing SolidWorks, material parameters are set in the Abaqus simulation software, then load parameters, compression parameters and finite element grids are set, and simulation calculation is carried out.
Example 2
According to the fig. 3, 4 and 5, this embodiment provides a simulation verification test of a shock absorber plate rod structure with negative poisson ratio, which verifies a lattice model with negative poisson ratio, performs data processing by the software, calculates poisson ratio-time curve graph after data are derived, as shown in fig. 4 of the specification, the minimum poisson ratio is-0.849, as shown in fig. 5 of the specification, the poisson ratio is-0.468, and the designed structure is found to have a performance far better than that of the traditional negative poisson ratio model after comparison.
Before simulation of Abaqus simulation software, a virtual model is established by utilizing SolidWorks, and the Abaqus simulation software is firstly set upMaterial parameters, including true stress-true strain parameters, yield strength: 305Mpa, density: 2.7g/cm 3 Modulus of elasticity: 70GPa, poisson ratio of material: 0.34, table 1 below is a true stress and plastic strain table for AlSi10 Mg.
TABLE 1
| True stress (MPa) | Plastic strain | True stress (MPa) | Plastic strain |
| 305 | 0 | 409 | 0.02 |
| 337 | 0.004 | 424 | 0.024 |
| 357 | 0.008 | 438 | 0.027 |
| 377 | 0.012 | 452 | 0.031 |
| 393 | 0.016 |
And setting load parameters, compression parameters and dividing finite element grids, performing simulation calculation, and observing the deformation condition of the material after the elastic deformation stage of pressure is subjected to experimental simulation under the model.
After the simulation is finished, 6 points are taken on the upper edge surface of the model, and the average Y-axis displacement and the average Y-axis stress of the 6 points are derived from Abaqus software; two points are respectively taken at two sides of the middle of the integral model, average X-axis displacement is derived according to the mode, the average X-axis displacement is divided by the total length of the model to obtain X-axis strain, the average Y-axis displacement is divided by the total height of the model to obtain Y-axis strain, and a certain displacement load and a fixed displacement time are applied to a simulation experiment, so that the displacement speed of pressing down of a press machine is certain, the time and the displacement amount have a one-to-one correspondence, and a Poisson ratio-time diagram can be made.
The negative poisson ratio material is often applied to manufacturing shock absorption equipment because of the good energy absorption capacity; however, if the stress exceeds the yield limit of the structure, the model is subjected to large plastic deformation, and the model is considered to be invalid and cannot play a role in damping. Thus, the following study of the model poisson's ratio was performed at a stage before the yield limit for the selected stress.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A shock absorbing plate pole structure with negative poisson's ratio, characterized in that: including truss and rhombus rotator, the truss includes periodic unit, periodic unit is nearly indent hexagon structure, every group periodic unit's nearly indent hexagon structure contains horizontal pole and diagonal bar, diagonal bar symmetry is at horizontal pole both ends and be located the homonymy, homonymy be equipped with the rhombus rotator on the horizontal pole between the diagonal bar, the rhombus rotator upside all is equipped with truss and two sets of truss parallel arrangement, truss and rhombus rotator alternate arrangement setting.
2. The shock absorbing panel rod structure with negative poisson's ratio according to claim 1, wherein: the truss and diamond rotator manufacturing material is one of metal, PLA consumable, carbon fiber and composite material.
3. The shock absorbing panel rod structure with negative poisson's ratio according to claim 1, wherein: the distance between the truss inlet cross bars at the upper side and the lower side of the diamond-shaped rotator is 6L, and L is a size coefficient.
4. The shock absorbing panel rod structure with negative poisson's ratio according to claim 1, wherein: the distance between the cross bars at the far point is 8L, and L is the size coefficient.
5. The shock absorbing panel rod structure with negative poisson's ratio according to claim 1, wherein: the length of the truss upper cross bar is 6L, and L is a dimension coefficient.
6. The shock absorbing panel rod structure with negative poisson's ratio according to claim 1, wherein: the lengths of the two groups of diagonal rods are ∈2L, and L is a size coefficient.
7. The shock absorbing panel rod structure with negative poisson's ratio according to claim 1, wherein: the included angle between the inclined rod and the cross rod is 135 degrees.
8. The shock absorbing panel rod structure with negative poisson's ratio according to claim 1, wherein: the side length of the diamond-shaped rotator is 5L, and L is a size coefficient.
9. The shock absorbing panel rod structure with negative poisson's ratio according to claim 1, wherein: the included angle between the oblique side of the diamond-shaped rotary sub-and the joint of the cross bar is 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210672890.5A CN114962508B (en) | 2022-06-14 | 2022-06-14 | Shock attenuation board pole structure with negative poisson's ratio |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210672890.5A CN114962508B (en) | 2022-06-14 | 2022-06-14 | Shock attenuation board pole structure with negative poisson's ratio |
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| Publication Number | Publication Date |
|---|---|
| CN114962508A CN114962508A (en) | 2022-08-30 |
| CN114962508B true CN114962508B (en) | 2024-01-26 |
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| CN202210672890.5A Active CN114962508B (en) | 2022-06-14 | 2022-06-14 | Shock attenuation board pole structure with negative poisson's ratio |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113810A (en) * | 2018-08-09 | 2019-01-01 | 南京航空航天大学 | Engine with honeycomb type negative poisson's ratio structure contains ring and manufacturing method |
| CN109719865A (en) * | 2017-10-31 | 2019-05-07 | 空中客车操作有限责任公司 | For manufacturing the modular mold and method of fibre reinforced materials plate |
| CN111436211A (en) * | 2017-09-27 | 2020-07-21 | 香港科技大学 | Method and apparatus for modeling and designing multi-dimensional cell structures for additive manufacturing |
| CN113081402A (en) * | 2021-03-31 | 2021-07-09 | 北京航空航天大学 | Femoral stem prosthesis |
| CN113498463A (en) * | 2019-03-29 | 2021-10-12 | 三菱重工业株式会社 | Method for manufacturing negative thermal expansion member |
-
2022
- 2022-06-14 CN CN202210672890.5A patent/CN114962508B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111436211A (en) * | 2017-09-27 | 2020-07-21 | 香港科技大学 | Method and apparatus for modeling and designing multi-dimensional cell structures for additive manufacturing |
| CN109719865A (en) * | 2017-10-31 | 2019-05-07 | 空中客车操作有限责任公司 | For manufacturing the modular mold and method of fibre reinforced materials plate |
| CN109113810A (en) * | 2018-08-09 | 2019-01-01 | 南京航空航天大学 | Engine with honeycomb type negative poisson's ratio structure contains ring and manufacturing method |
| CN113498463A (en) * | 2019-03-29 | 2021-10-12 | 三菱重工业株式会社 | Method for manufacturing negative thermal expansion member |
| CN113081402A (en) * | 2021-03-31 | 2021-07-09 | 北京航空航天大学 | Femoral stem prosthesis |
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