CN116292717A - Geometric locking type honeycomb structure, energy consumption device and anti-collision device - Google Patents
Geometric locking type honeycomb structure, energy consumption device and anti-collision device Download PDFInfo
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- CN116292717A CN116292717A CN202310301218.XA CN202310301218A CN116292717A CN 116292717 A CN116292717 A CN 116292717A CN 202310301218 A CN202310301218 A CN 202310301218A CN 116292717 A CN116292717 A CN 116292717A
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- paper folding
- honeycomb structure
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- plane
- pipe section
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- 238000005265 energy consumption Methods 0.000 title abstract description 13
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 16
- 239000000463 material Substances 0.000 description 10
- 230000003139 buffering effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000011825 aerospace material Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure
- F16F7/122—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure characterised by corrugations, e.g. of rolled corrugated material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a geometric locking type honeycomb structure, an energy consumption device and an anti-collision device, wherein the geometric locking type honeycomb structure is obtained by mirroring a basic unit in space along an XY plane, an XZ plane and a YZ plane; the basic unit is formed by connecting six paper folding pipes; one end of the paper folding pipe is open, and the other end of the paper folding pipe is a closed bottom surface; the bottom surfaces of the six paper folding pipes are mutually perpendicular and are enclosed to form a regular hexahedral structure; the paper folding pipe comprises a first pipe section connected with the bottom surface and a second pipe section connected with the opening, one paper folding pipe is shared by the two mirrored basic units, and the mirrored position is the joint of the first pipe section and the second pipe section. The folded paper tubes are uniformly arranged in a mirror image topology in the X, Y, Z directions, so that the isotropic requirement can be met, the two-stage energy consumption target can be realized through structural design, and meanwhile, the mechanical property of the honeycomb structure can be changed through adjusting design parameters, so that the folded paper tubes have a wide application prospect.
Description
Technical Field
The invention relates to the technical field of honeycomb structures, in particular to a two-stage geometric locking type honeycomb structure with isotropy.
Background
With the continuous exploration of science and technology by human beings, natural materials are gradually unable to meet the increasingly expanded use demands, and the demands for materials with supernormal physical characteristics are increasingly urgent, so that the energy-consuming structure with a complex structure is generated due to the rapid development of 3D printing technology. In the existing energy dissipation structure, the regular hexagonal honeycomb plate has a mature process system, has the characteristics of light weight, high strength, low relative density, excellent energy dissipation capacity and the like, and is a material widely applied at present. The excellent energy consumption performance makes the honeycomb material have wide application fields, such as aerospace materials, energy consumption structures, anti-collision structures and the like.
The traditional honeycomb structure is an anisotropic material, the coplanar strength of the anisotropic material is far lower than the different-plane strength, and the coplanar energy consumption capability is very poor, so that the application scene of the anisotropic material is more limited. The existing traditional honeycomb energy dissipation materials can realize efficient energy absorption, but the stress-strain curve usually only has one platform section and cannot realize multi-stage buffering energy absorption, so that when the working condition of multi-stage buffering is faced, various buffering materials are required to be combined together, the manufacturing process is extremely high in requirement, the final energy dissipation effect is influenced, and the application space of the honeycomb structure is greatly limited. That is, the prior art has the disadvantage that the coplanar energy consumption capability is too low, and the honeycomb structure cannot meet the multi-stage energy consumption requirement.
Disclosure of Invention
The invention provides an isotropic two-stage geometrically-locked energy-consuming honeycomb structure, an energy-consuming device and an anti-collision device, which have multi-stage energy-consuming capability, isotropy and good programmability.
The technical scheme adopted for solving the technical problems is as follows:
the invention firstly provides a geometric locking honeycomb structure, which is obtained by mirroring the basic unit in space along an XY plane, an XZ plane and a YZ plane; the basic unit is formed by connecting six paper folding pipes; one end of the paper folding pipe is open, and the other end of the paper folding pipe is a closed bottom surface; the bottom surfaces of the six paper folding pipes are mutually perpendicular and are enclosed to form a regular hexahedral structure; the paper folding pipe comprises a first pipe section connected with the bottom surface and a second pipe section connected with the opening, one paper folding pipe is shared by the two mirrored basic units, and the mirrored position is the joint of the first pipe section and the second pipe section.
As a further preferred aspect of the present invention, the adjacent basic units are obtained by mirror topology along an XY plane, an XZ plane, and a YZ plane.
As a further preferred aspect of the present invention, the honeycomb structure has a feature of a geometric locking type, and the honeycomb structure formed by the mirror symmetry topology (rotation) of adjacent basic units is a geometric locking type, and when the honeycomb structure is compressed, the paper folding tubes of the basic units perpendicular to the compression direction are extrusion locked due to geometric conflict, so as to provide energy consumption in the second stage.
As a further preferred aspect of the present invention, the basic units are identical in structure and size.
As a further preferable aspect of the present invention, the connecting folded paper tubes between the basic units are called connecting tubes, and the number K of the connecting tubes is not less than 1.
As a further preferred aspect of the present invention, the paper folding tubes are in a three-pump folding structure, each paper folding tube includes two mirror-image three-pump folding structures, each three-pump folding structure is composed of four identical parallelograms, and control parameters of the parallelograms are respectively defined as height, width and included angle.
As a further preferred aspect of the present invention, the included angle is in the range of 55 ° -90 °.
As a further preferred aspect of the invention, the ratio of the height to the width of the parallelogram is in the range of 0.5-2.
The invention also provides an energy consumption device which comprises the geometrically locking honeycomb structure.
The invention also provides an anti-collision device which comprises the geometrically locking honeycomb structure.
Through the technical scheme, compared with the prior art, the invention has the following beneficial technical effects:
1. the isotropic two-stage geometric locking energy-consuming honeycomb structure provided by the invention has the advantages that all geometric parameters can be adjusted in the initial design, so that the mechanical property of the honeycomb structure is regulated and controlled, and the honeycomb structure has good programmability.
2. The isotropic two-stage geometrically locked energy-dissipating honeycomb structure provided by the invention has the advantages that the folded paper tubes are arranged in the X, Y, Z three directions, the three-directional isotropy property can be realized, and the structural design with the multidirectional buffering requirement can be met.
3. The isotropic two-stage geometric locking energy-dissipation honeycomb structure provided by the invention has the advantages that when compressive loads in different directions are received, under the same relative density and space size, the geometric locking hexahedral metamaterial can achieve more than 70% of the energy dissipation capacity of a traditional honeycomb at different surfaces, the coplanar energy dissipation capacity is 9-10 times of that of the traditional honeycomb, and the out-of-plane and in-plane energy dissipation capacities are very excellent.
4. The isotropic two-stage geometrically locking energy dissipation honeycomb structure provided by the invention can provide two-stage energy dissipation capability when being subjected to external load, when compression load is applied to the outer side, the paper folding pipe in the compression direction is folded and deformed at first to provide first-stage energy dissipation, and then the paper folding pipe in the orthogonal direction is deformed to provide second-stage energy dissipation, so that the structural design requirement with multi-stage buffering requirement can be met.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of the overall structure of a preferred embodiment provided by the present invention;
FIG. 2 is a schematic diagram of a topology of a preferred embodiment of the present invention, where a is a schematic diagram of an XZ plane mirror topology, b is a schematic diagram of a YZ plane mirror topology, and c is a schematic diagram of an XY plane mirror topology;
FIG. 3 is a schematic view of the basic unit structure in the preferred embodiment provided by the present invention;
FIG. 4 is a schematic view of a paper folding tube according to a preferred embodiment of the present invention;
FIG. 5 is a schematic illustration of the structure of a three-pump folded configuration in a preferred embodiment provided by the present invention;
fig. 6 is a normalized stress-strain curve of a preferred embodiment provided by the present invention.
In the figure: 1 is an X-direction paper folding pipe, 2 is a Y-direction paper folding pipe, 3 is a Z-direction paper folding pipe, 11 is a parallelogram high, 12 is parallelogram wide, 13 is parallelogram included angle, 31 is paper folding pipe bottom surface, 4 is basic unit.
Description of the embodiments
The present invention will now be described in further detail with reference to the accompanying drawings. In this application, it should be understood that the specific dimensions and the number adopted in the present embodiment are only for illustrating the technical scheme, and do not limit the protection scope of the present invention.
As shown in fig. 1-4, there is an isotropic two-stage geometrically locked energy dissipating honeycomb structure consisting of several basic cells 4 that are topologically combined in space. The topology of the honeycomb structure is as follows: firstly, the basic unit 4 is mirrored along the XZ plane to obtain a 2 multiplied by 1 combined structure; secondly, mirroring the combined structure along the YZ plane to obtain a combined structure of 2 multiplied by 1; finally mirror-image along XY plane 2 x 2. It should be noted that higher order composite structures can be obtained topologically in a mirrored fashion as described above. The basic unit 4 is formed by mutually connecting six paper folding pipes, and comprises two X-direction paper folding pipes 1, two Y-direction paper folding pipes 2 and two Z-direction paper folding pipes 3, wherein the bottom surfaces 31 of every two adjacent paper folding pipes are mutually perpendicular, the bottom surfaces 31 of the paper folding pipes are square, and six bottom surfaces form a regular hexahedron structure at the center. The paper folding pipes are three-pump folding structures, each paper folding pipe comprises two mirror-image three-pump folding structures, each three-pump folding structure consists of four identical parallelograms, and control parameters of the parallelograms are respectively defined as a height 11, a width 12 and an included angle 13. The surface surrounded by A, B, C, D is the paper folding pipe bottom surface 31. A paper folding pipe located between two adjacent base units 4 is defined as a connection pipe 5.
As a preferred embodiment, the height of the parallelogram is 10mm, the width of the parallelogram is 10mm, the included angle of the parallelogram is 60 degrees, the ratio of the height to the width of the parallelogram is 1, and the number of the connecting pipes 5 is 1.
In the present embodiment, a honeycomb structure of 4 x 4 base units 4 as shown in fig. 1 is established, the materials in the honeycomb structure are all defined as aluminum, the present example completed the finite element numerical simulation calculation of the mechanical properties of the honeycomb structure, as shown in fig. 5. The honeycomb structure in the embodiment has good two-stage energy consumption capability through calculation, is of an isotropic structure, and has wide application space. This embodiment, by means of a preferred geometry, is a non-rigid movable structure in both energy consuming phases, thereby exhibiting a geometrically locking character.
In the invention, the number of the connecting pipes 5 can be adjusted according to the actual use requirement, and the parallelogram height 11, the parallelogram width 12 and the parallelogram included angle 13 in the three-pump folding configuration are all adjustable parameters, so that the invention is applicable to various different application conditions. The mirror image sequence in the topology of the present invention is not unique, and actually changing the mirror image sequence does not affect the final shaping, and only the requirement that adjacent basic units 4 are mirror image structures is satisfied.
The embodiment provides an energy dissipation device, and in particular, the geometric locking type honeycomb structure provided by the embodiment is used as an energy dissipation unit of the energy dissipation device, and energy dissipation is performed by using the geometric locking type honeycomb structure.
The invention also provides an anti-collision device, which comprises the geometric locking honeycomb structure, and particularly the geometric locking honeycomb structure provided by the embodiment is used as an energy consumption unit of the anti-collision device, and the geometric locking honeycomb structure is used for dissipating energy, so that the aim of collision prevention is fulfilled.
The above-described embodiment is merely one embodiment of the present invention, the present invention is not limited to this embodiment, and any simple modification, substitution without departing from the principle and essential characteristics of the present invention fall within the scope of the present invention.
Claims (6)
1. A geometrically locked honeycomb structure, characterized in that: the basic unit is obtained by mirror topology along an XY plane, an XZ plane and a YZ plane in space; the basic unit is formed by connecting six paper folding pipes; one end of the paper folding pipe is open, and the other end of the paper folding pipe is a closed bottom surface; the bottom surfaces of the six paper folding pipes are mutually perpendicular and are enclosed to form a regular hexahedral structure; the paper folding pipe comprises a first pipe section connected with the bottom surface and a second pipe section connected with the opening, one paper folding pipe is shared by the two mirrored basic units, and the mirrored position is the joint of the first pipe section and the second pipe section.
2. The geometrically locked honeycomb structure of claim 1, wherein: the paper folding pipes are three-pump folding structures, each paper folding pipe comprises two mirror-image three-pump folding structures, and each three-pump folding structure consists of four identical parallelograms.
3. The geometrically locked honeycomb structure of claim 2, wherein: the included angle of the parallelograms forming the paper folding pipe ranges from 55 degrees to 90 degrees.
4. A geometrically locked honeycomb structure as defined in claim 3, wherein: the ratio of the height to the width of the parallelogram constituting the paper folding pipe ranges from 0.5 to 2.
5. A power dissipating structure comprising the geometrically locked honeycomb structure of any one of claims 1-4.
6. An impact structure comprising the geometrically locked honeycomb structure of any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310301218.XA CN116292717A (en) | 2023-03-27 | 2023-03-27 | Geometric locking type honeycomb structure, energy consumption device and anti-collision device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310301218.XA CN116292717A (en) | 2023-03-27 | 2023-03-27 | Geometric locking type honeycomb structure, energy consumption device and anti-collision device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116292717A true CN116292717A (en) | 2023-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310301218.XA Pending CN116292717A (en) | 2023-03-27 | 2023-03-27 | Geometric locking type honeycomb structure, energy consumption device and anti-collision device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116292717A (en) |
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2023
- 2023-03-27 CN CN202310301218.XA patent/CN116292717A/en active Pending
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