CN112943834B - Positive and negative Poisson ratio cycle hybridization impact-resistant energy-absorbing structure and application thereof - Google Patents
Positive and negative Poisson ratio cycle hybridization impact-resistant energy-absorbing structure and application thereof Download PDFInfo
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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
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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
Abstract
The invention discloses a positive and negative Poisson ratio cycle hybridization impact-resistant energy-absorbing structure and application thereof. The impact-resistant energy-absorbing structure comprises a first side wall plate, a second side wall plate, positive Poisson ratio cells with a positive Poisson ratio effect, negative Poisson ratio cells with a negative Poisson ratio effect, and a first filling material and a second filling material which are respectively filled in the positive Poisson ratio cells and the negative Poisson ratio cells, wherein the positive Poisson ratio cells and the negative Poisson ratio cells are alternately and tightly arranged between the first side wall plate and the second side wall plate along the transverse direction, the first filling material is liquid, and part of longitudinal stress is converted into transverse extrusion force through the positive Poisson ratio cells filled with the liquid. According to the invention, the longitudinal impact force borne by the cell element with the positive Poisson ratio is converted into the transverse extrusion force, so that the cell element with the negative Poisson ratio is fully compressed and deformed while the longitudinal displacement is reduced, and therefore, the filling material in the negative Poisson ratio is more fully compressed and absorbs energy.
Description
Technical Field
The invention belongs to the technical field of energy absorption devices, and particularly relates to a positive and negative Poisson ratio cycle hybridization impact-resistant energy absorption structure and application thereof.
Background
In modern society, many targets are subjected to impact loads during use, causing irreversible damage or even destruction. For example, when a ship is subjected to the action of explosive shock waves, the structure of the ship can be greatly deformed or torn and damaged; under the condition that the automobile is out of control, the roadside guardrail can be impacted by the automobile; when a ship passing through the bridge is out of control, the bridge pier is likely to be impacted by the ship; and so on. In order to resist the action of the impact load, protect the important cabin inside, reduce the damage of the automobile and the pier and the like, a certain impact-resistant/buffering energy-absorbing structure is often required to be arranged so as to slow down and attenuate the impact load and absorb the impact energy, thereby achieving the purpose of protection.
For the problem of ship structure impact resistance, at present, a core layer with a macroscopic positive Poisson's ratio effect such as honeycomb and corrugation is mostly adopted to absorb impact energy so as to reduce the deformation degree of a back plate of a sandwich plate, and the energy absorption efficiency of the sandwich plate needs to be improved. In addition, although the energy absorption efficiency of the core layer can be improved to a certain extent by filling foam in the core layer cells, the filled foam material cannot be fully compressed in all directions due to the positive poisson's ratio effect of the core layer cells, and the compression energy absorption capability of the foam material cannot be exerted. In the field of automobile collision avoidance, a plurality of roadside energy absorption structures basically utilize ductility energy absorption of metal materials, but have poor flexibility; although the anti-collision water baffle has the characteristic of better flexible arrangement, the main function of the anti-collision water baffle is 'baffle', and although the anti-collision water baffle has a certain buffering function, the energy absorption function is very limited. In the bridge anticollision field, then the effect of more ground side weight buffering, long, the reduction impact peak value of reduction impact promptly.
For example, patent document CN102700488B discloses a buffer energy-absorbing structure formed by a metal foam material or a metal honeycomb material gradient-filled hollow metal thin-wall structure. The structure mainly absorbs energy through the longitudinal compression of the foam or the honeycomb material, and has the problems that the longitudinal compression displacement is relatively large, and the compression energy absorption process of the filling material is insufficient.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a positive-negative poisson ratio cycle hybridization impact-resistant energy-absorbing structure and application thereof, aiming at providing a novel positive-negative poisson ratio cycle hybridization impact-resistant energy-absorbing structure, which can well coordinate and deform among layers, convert longitudinal impact force borne by a cell element with a positive poisson ratio into vertical impact force (namely transverse) extrusion force, reduce longitudinal displacement and fully compress and deform the cell element with a negative poisson ratio, thereby fully compressing and absorbing energy by a filling material in the negative poisson ratio. Therefore, the technical problems that longitudinal compression displacement is relatively large and the compression energy absorption process of the filling material is insufficient are solved.
The invention provides a positive and negative Poisson ratio cycle hybridization impact-resistant energy-absorbing structure, which comprises a first side wall plate, a second side wall plate, a positive Poisson ratio cell with a positive Poisson ratio effect, a negative Poisson ratio cell with a negative Poisson ratio effect, and a first filling material and a second filling material respectively filled in the positive Poisson ratio cell and the negative Poisson ratio cell, wherein the positive Poisson ratio cell and the negative Poisson ratio cell are alternately and tightly arranged between the first side wall plate and the second side wall plate along the transverse direction, the first filling material is liquid, part of longitudinal stress is converted into transverse extrusion force through the positive Poisson ratio cell filled with the liquid, the transverse direction is a direction from the first side wall plate to the second side wall plate, and the longitudinal direction is a direction perpendicular to the transverse direction.
Preferably, the positive poisson's ratio cells are arranged based on a regular hexagon, and the negative poisson's ratio cells are arranged based on a concave hexagon or a double arrow shape matched with the regular hexagon.
Preferably, a plurality of positive poisson's ratio cells are overlapped in the longitudinal direction to form a row of positive poisson's ratio cells, a plurality of negative poisson's ratio cells are overlapped in the longitudinal direction to form a row of negative poisson's ratio cells, and the row of positive poisson's ratio cells and the row of negative poisson's ratio cells are alternately and closely arranged in the transverse direction.
Preferably, the first packing material is fresh water or seawater.
Preferably, the loading of the first filler material is 100% of the volume of the cell at positive poisson's ratio.
Preferably, connected to the first and second side wall panels is a negative poisson's ratio cell connected to the first and second side wall panels by a triangle-based arranged auxiliary portion filled with a foam material.
Preferably, the second filler material is polyurethane foam, PVC foam, phenolic foam, aluminum foam or Voronoi foam.
Preferably, the cell walls of the positive poisson's ratio cell and the negative poisson's ratio cell are made of alloy materials or fiber reinforced composite materials.
Preferably, the alloy material is alloy steel with tensile strength of 1620MPa or more, titanium alloy with tensile strength of 1100-1400MPa or aluminum alloy with tensile strength of more than 480 MPa; the fiber reinforced composite material is a polyethylene fiber reinforced composite material, a Kevlar fiber reinforced composite material, an aramid fiber reinforced composite material, a glass fiber reinforced composite material, a carbon fiber reinforced composite material or a PBO fiber reinforced composite material.
Another aspect of the present invention provides a use of the impact-resistant energy-absorbing structure described above, the use comprising: the anti-impact energy-absorbing structure is used for protecting a device to be protected, and the anti-impact energy-absorbing structure is arranged in a direction that the first side wall plate and the second side wall plate are perpendicular to the surface of the device to be protected, so that the positive poisson's ratio cells and the negative poisson's ratio cells are in contact with the device to be protected, and are alternately and tightly arranged on the surface of the device to be protected.
In general, at least the following advantages can be obtained by the above technical solution contemplated by the present invention compared to the prior art.
(1) In the invention, when the positive Poisson ratio cell elements are used in the anti-impact process, the liquid filling materials in the positive Poisson ratio cell elements can not be compressed and flow transversely to ensure that the hexagonal positive Poisson ratio cell elements generate transverse bulging deformation, and the longitudinal stress is changed into transverse extrusion force, so that the transverse extrusion effect is generated on the adjacent negative Poisson ratio cell elements. Under the combined action of longitudinal impact load and transverse extrusion force, the negative Poisson ratio cell element and the filling material thereof generate compressive deformation in all directions so as to more fully absorb energy. The residual impact energy is transmitted in the structure in the form of stress waves, and the transmission and reflection transmission rules of the stress waves are changed through the wave resistance characteristics of circular hybridization, so that the purposes of attenuating and dissipating the residual impact energy are achieved.
(2) According to the invention, a row of positive poisson ratio cells are formed by overlapping a plurality of positive poisson ratio cells in the longitudinal direction, a row of negative poisson ratio cells are formed by overlapping a plurality of negative poisson ratio cells in the longitudinal direction, the positive poisson ratio cells and the negative poisson ratio cells are alternately and tightly arranged in the transverse direction to form positive-negative poisson ratio cycle hybridization, and the positive poisson ratio cells and the negative poisson ratio cells are tightly attached to each other in structure. Therefore, the compression deformation energy absorption capacity of the filling foam material can be effectively improved, all layers of the structure can be well coordinated and deformed, the integral energy absorption efficiency of the energy absorption structure can be effectively improved, and the displacement of the energy absorption structure along the impact load action direction is reduced.
Drawings
FIG. 1 is a horizontal cross-sectional top view of a positive and negative Poisson's ratio cycle hybrid impact-absorbing structure provided in example 1 of the present invention;
FIG. 2 is a horizontal cross-sectional top view of a positive and negative Poisson's ratio cycle hybrid impact-absorbing structure provided in example 2 of the present invention;
FIG. 3 is a schematic diagram of the local squeezing action of the impact-resistant process of the adjacent positive and negative Poisson ratio cells of the positive and negative Poisson ratio cycle hybrid impact-resistant energy-absorbing structure provided in example 1 of the present invention;
FIG. 4 is a schematic diagram of the local squeezing action of the impact-resistant energy-absorbing structure provided by embodiment 2 of the present invention in the impact-resistant process of the adjacent positive and negative Poisson ratio cells.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
10. a first side wall panel; 20. a positive poisson ratio cell element; 30. a negative poisson ratio cell element; 40. a first filler material; 50. a second filler material; 60. an auxiliary part; 70. a second sidewall plate; 100. the positive and negative Poisson ratio cycle hybridization impact-resistant energy-absorbing structure; 200. impact load; 300. a compressive force.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it should be noted that the terms "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The embodiment of the invention provides a positive and negative Poisson ratio cycle hybrid impact-resistant energy-absorbing structure, which comprises a first side wall plate 10, a second side wall plate 70, a positive Poisson ratio cell 20 with a positive Poisson ratio effect, a negative Poisson ratio cell 30 with a negative Poisson ratio effect, a first filling material 40 and a second filling material 50 filled in the positive Poisson ratio cell 20 and the negative Poisson ratio cell 30 respectively, wherein the positive Poisson ratio cell 20 and the negative Poisson ratio cell 30 are alternately and tightly arranged between the first side wall plate 10 and the second side wall plate 70 along a transverse direction, the first filling material 40 is liquid, part of longitudinal stress is converted into transverse compressive stress through the positive Poisson ratio cell 20 filled with the liquid, the transverse direction is a direction from the first side wall plate 10 to the second side wall plate 70, and the longitudinal direction is a direction perpendicular to the transverse direction. The above-mentioned "lateral direction" is the direction of MN shown in fig. 1, and the "longitudinal direction" is the direction of AB shown in fig. 1.
In the above scheme, the side wall panels 10 are used for forming a closed space and ensuring the longitudinal static strength; the positive Poisson ratio cell 20 is used for loading the first filling material 40 and absorbing energy through bulging and extrusion deformation in an anti-impact process; the negative Poisson ratio cell element 30 is used for loading a second filling material 50 and generating coordinated deformation energy absorption in the impact-resistant process; the first filler material 40 carried by the positive poisson's ratio cell 20 is used to generate a compressive load in the transverse direction during impact resistance, further compressing the negative poisson's ratio cell 30; the second filler material 50 in the negative poisson's ratio cell 30 is used for impact compression energy absorption.
In one possible approach, the positive poisson's ratio cells 20 are based on a regular hexagonal arrangement and the negative poisson's ratio cells 30 are based on a concave hexagonal or double arrow-shaped arrangement that mates with the regular hexagonal arrangement. It is understood that the transverse cross-section of the positive poisson's ratio cell 20 is a regular hexagon, and the transverse cross-section of the negative poisson's ratio cell 30 is a concave hexagon or a double arrow shape that fits the regular hexagon. A plurality of positive poisson ratio cells 20 are stacked in the longitudinal direction to form a row of positive poisson ratio cells, a plurality of negative poisson ratio cells 30 are stacked in the longitudinal direction to form a row of negative poisson ratio cells, and the row of positive poisson ratio cells and the row of negative poisson ratio cells are alternately arranged closely in the transverse direction.
The first filling material 40 is fresh water or seawater. The loading of the first filler material 40 is 100% of the volume of the cell at positive poisson's ratio.
In one possible way, connected to the first and second side wall plates 10, 70 is a negative poisson's ratio cell 30, the negative poisson's ratio cell 30 being connected to the first and second side wall plates 10, 70 by a triangularly arranged auxiliary part 60, the auxiliary part 60 being filled with a foam material. It is understood that the lateral cross-section of the auxiliary portion 60 is triangular.
In another feasible way, the negative poisson's ratio cell 30 connected to the first side wall plate 10 and the second side wall plate 70 can be a single-side concave structure, that is, the side of the negative poisson's ratio cell 30 contacting the first side wall plate 10 and the second side wall plate 70 is a plane structure, and the other side of the negative poisson's ratio cell 30 contacting the positive poisson's ratio cell 20 is a concave structure, so that a concave pentagonal structure is formed. In this case, the auxiliary unit 60 is not required.
In the above scheme, the second filling material 50 is polyurethane foam, PVC foam, phenolic foam, aluminum foam, or Voronoi foam. The cell walls of the positive poisson's ratio cell 20 and the negative poisson's ratio cell 30 are made of high-strength alloy materials or fiber reinforced composite materials. Wherein the alloy material is alloy steel with tensile strength of 1620MPa or more, titanium alloy with tensile strength of 1100-1400MPa or aluminum alloy with tensile strength of more than 480 MPa. It should be noted that the above examples of the material for the cell walls of the positive poisson's ratio cell 20 and the negative poisson's ratio cell 30 should not be construed as limiting the present invention, and the material for the cell walls of the positive poisson's ratio cell 20 and the negative poisson's ratio cell 30 may be other materials, for example, when the embodiment of the present invention is applied to bridge collision avoidance, only ordinary carbon steel is needed in consideration of economic cost.
The fiber reinforced composite material is a polyethylene fiber reinforced composite material, a Kevlar fiber reinforced composite material, an aramid fiber reinforced composite material, a glass fiber reinforced composite material, a carbon fiber reinforced composite material or a PBO fiber reinforced composite material. Examples of the inventionOptionally, the fiber-reinforced composite material may be
HB26 resin-based ultrahigh molecular weight polyethylene fiber reinforced composite material, epoxy resin-based Kevlar-129 fiber reinforced composite material, epoxy resin-based CT736 aramid fiber reinforced composite material, polycarbonate-based SW220 glass fiber reinforced composite material, epoxy resin-based T700 carbon fiber reinforced composite material or epoxy resin-based T700 carbon fiber reinforced composite material
PBO fiber reinforced composites, and the like.
Another embodiment of the present invention provides a use of the impact-resistant energy-absorbing structure described above, the use comprising: the impact-resistant and energy-absorbing structure is arranged in a direction that the first side wall plate 10 and the second side wall plate 70 are perpendicular to the surface of the device to be protected, so that the positive poisson's ratio cells 20 and the negative poisson's ratio cells 30 are in contact with the device to be protected, and are alternately and tightly arranged on the surface of the device to be protected.
The technical scheme provided by the invention is further explained in detail by two specific embodiments as follows:
example 1
Referring to fig. 1 and 3, the impact target (device to be protected) is subjected to an impact load 200 acting in the longitudinal direction, and the hexagonal positive poisson's ratio cells 20 and the concave negative poisson's ratio cells 30 are cyclically crossed in the transverse direction to form a closed energy absorbing structure with the first side wall plate 10 and the second side wall plate 70; the number of layers of the hexagonal positive Poisson ratio cell 20 and the concave negative Poisson ratio cell 30 in the circular hybridization can be reasonably selected according to the requirement under the condition of meeting the weight and space limitations; the liquid filling material 40 is filled in the hexagonal positive poisson's ratio cells 20, and the foam filling material 50 is filled in the concave negative poisson's ratio cells 30. When the impact load 200 acts, the hexagonal regular poisson's ratio cells 20 are compressed and deformed, and the liquid filling material 40 in the hexagonal regular poisson's ratio cells 20 transversely flows to cause the hexagonal regular poisson's ratio cells 20 to transversely bulge and deform due to the incompressible state, and transverse extrusion force 300 is generated; the lateral compressive force 300 acts on the adjacent concave negative poisson's ratio cell 30; the concave negative Poisson ratio cell 30 is subjected to longitudinal and transverse compression deformation simultaneously under the action of the impact load 200 and the transverse extrusion force 300; the foam padding material 50 in the concave negative poisson's ratio cell 30 is fully compressed and fully energy absorbing.
Example 2
Referring to fig. 2 and 4, the impact target (device to be protected) is subjected to an impact load 200 acting in the longitudinal direction, and the hexagonal positive poisson's ratio cells 20 and the double arrow-shaped negative poisson's ratio cells 30 are cyclically crossed in the transverse direction to form a closed energy absorbing structure with the first side wall plate 10 and the second side wall plate 70; the number of layers of the hexagonal positive Poisson ratio cell element 20 and the double arrow-shaped negative Poisson ratio cell element 30 in the circular hybridization can be reasonably selected according to the requirement under the condition of meeting the weight and space limitations; the liquid filling material 40 is filled in the hexagonal positive poisson's ratio cell 20, and the foam filling material 50 is filled in the double arrow-shaped negative poisson's ratio cell 30. When the impact load 200 acts, the hexagonal regular poisson's ratio cells 20 are compressed and deformed, and the liquid filling material 40 in the hexagonal regular poisson's ratio cells 20 transversely flows to cause the hexagonal regular poisson's ratio cells 20 to transversely bulge and deform due to the incompressible state, and transverse extrusion force 300 is generated; the lateral squeezing force 300 acts on the adjacent double arrow-shaped negative poisson's ratio cell elements 30; under the action of the impact load 200 and the transverse extrusion force 300, the double-arrow-shaped negative Poisson's ratio cell element 30 simultaneously generates longitudinal and transverse compression deformation; the foam padding material 50 in the dual-arrow negative poisson's ratio cell 30 is fully compressed and fully energy absorbing.
When the ship structure is under the action of explosive blast shock waves, or when guardrail devices on two sides of a road are collided by automobiles, or when piers are collided by moving objects such as ships, the ship structure and the guardrail devices are under the action of impact load 200. When the impact load 200 acts on the impact-resistant energy-absorbing structure 100, the cell 20 with the positive poisson ratio is impacted to be compressed, and the internal liquid filling material 40 flows transversely, so that the cell 20 with the positive poisson ratio is transversely expanded to generate a transverse extrusion force 300; under the combined action of the impact load 200 and the transverse extrusion force 300, the negative poisson ratio cell element 30 simultaneously generates longitudinal and transverse compression deformation, and the foam filling material 50 in the negative poisson ratio cell element is also compressed in the longitudinal and transverse directions in an all-around manner to fully absorb energy; the remaining impact energy propagates in the energy absorbing structure 100 in the form of stress waves; the propagation law of the stress wave is changed by using the circular cross wave resistance characteristic of the energy absorption structure 100, and the residual impact energy is absorbed.
The positive and negative Poisson ratio cycle hybridization impact-resistant energy-absorbing structure 100 provided by the invention can ensure that the layer of the positive Poisson ratio cell element 20 and the layer of the negative Poisson ratio cell element 30 are well coordinated and deformed, fully exert the compression energy-absorbing capacity of the foam filling material 50 in the negative Poisson ratio cell element 20, convert the load in the impact direction into the load in the vertical impact direction for dissipation, and effectively reduce the energy-absorbing displacement stroke, thereby effectively improving the overall energy-absorbing efficiency of the energy-absorbing structure 100 and greatly reducing the energy-absorbing displacement stroke.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A positive and negative Poisson ratio cycle hybridization impact-resistant energy-absorbing structure is characterized by comprising a first side wall plate (10), a second side wall plate (70), a positive Poisson ratio cell (20) with positive Poisson ratio effect, a negative Poisson ratio cell (30) with negative Poisson ratio effect, a first filling material (40) and a second filling material (50) which are respectively filled in the positive Poisson ratio cell (20) and the negative Poisson ratio cell (30),
wherein the positive poisson's ratio cells (20) and the negative poisson's ratio cells (30) are alternately and closely arranged between the first side wall plate (10) and the second side wall plate (70) along a transverse direction, the first filling material (40) is liquid, and part of longitudinal force is converted into transverse pressing force through the positive poisson's ratio cells (20) filled with the liquid, the transverse direction is a direction pointing from the first side wall plate (10) to the second side wall plate (70), and the longitudinal direction is a direction perpendicular to the transverse direction;
wherein the positive Poisson ratio cells (20) are arranged based on a regular hexagon and the negative Poisson ratio cells (30) are arranged based on a concave hexagon or a double arrow shape matched with the regular hexagon; a plurality of positive Poisson ratio cells (20) are stacked in the longitudinal direction to form a row of positive Poisson ratio cells, a plurality of negative Poisson ratio cells (30) are stacked in the longitudinal direction to form a row of negative Poisson ratio cells, and the row of positive Poisson ratio cells and the row of negative Poisson ratio cells are alternately and closely arranged in the transverse direction.
2. The impact-resistant energy-absorbing structure according to claim 1, characterized in that the first filler material (40) is fresh water or sea water.
3. The impact-absorbing energy-absorbing structure according to claim 2, characterized in that the loading of the first filler material (40) is 100% of the volume of the cell with a positive poisson ratio.
4. The impact-resistant and energy-absorbing structure according to claim 1 or 2, characterized in that connected to the first and second side wall panels (10, 70) are negative poisson's ratio cells (30), the negative poisson's ratio cells (30) being connected to the first and second side wall panels (10, 70) by an auxiliary portion (60) arranged on a triangular basis, the auxiliary portion (60) being filled with a foam material.
5. The impact-absorbing structure according to claim 1, wherein the second filler material (50) is a polyurethane foam, a PVC foam, a phenolic foam, an aluminum foam or a Voronoi foam.
6. The impact-resistant energy-absorbing structure according to claim 1, wherein the cell walls of the positive poisson's ratio cells (20) and the negative poisson's ratio cells (30) are of an alloy material or a fiber-reinforced composite material.
7. The impact-resistant energy-absorbing structure as recited in claim 6, wherein the alloy material is alloy steel with tensile strength above 1620MPa, titanium alloy with tensile strength between 1100-1400MPa or aluminum alloy with tensile strength greater than 480 MPa; the fiber reinforced composite material is a polyethylene fiber reinforced composite material, a Kevlar fiber reinforced composite material, an aramid fiber reinforced composite material, a glass fiber reinforced composite material, a carbon fiber reinforced composite material or a PBO fiber reinforced composite material.
8. Use of an impact-absorbing energy-absorbing structure according to any one of claims 1 to 7, characterized in that it comprises:
the anti-impact energy-absorbing structure is used for protecting a device to be protected, and the anti-impact energy-absorbing structure is arranged in a direction of enabling the first side wall plate (10) and the second side wall plate (70) to be perpendicular to the surface of the device to be protected, so that the positive Poisson ratio cells (20) and the negative Poisson ratio cells (30) are in contact with the device to be protected and are alternately and closely arranged on the surface of the device to be protected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110124603.2A CN112943834B (en) | 2021-01-29 | 2021-01-29 | Positive and negative Poisson ratio cycle hybridization impact-resistant energy-absorbing structure and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110124603.2A CN112943834B (en) | 2021-01-29 | 2021-01-29 | Positive and negative Poisson ratio cycle hybridization impact-resistant energy-absorbing structure and application thereof |
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| Publication Number | Publication Date |
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| CN112943834A CN112943834A (en) | 2021-06-11 |
| CN112943834B true CN112943834B (en) | 2022-08-02 |
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| CN114750469A (en) * | 2022-03-28 | 2022-07-15 | 广东亚太新材料科技有限公司 | Anti-elastic composite material containing negative Poisson's ratio ceramic structure and preparation method |
| US20230366960A1 (en) * | 2022-05-12 | 2023-11-16 | Joon Bu Park | Negative poisson's ratio materials for energy absorption |
| CN115323961B (en) * | 2022-07-11 | 2024-03-19 | 泉州装备制造研究所 | Road safety guard rail |
| CN115675346A (en) * | 2022-11-25 | 2023-02-03 | 西南交通大学 | Thin-walled tube filled with mixed Poisson ratio metamaterial |
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| CN104763772B (en) * | 2015-03-31 | 2017-03-08 | 华南理工大学 | A kind of buffering energy-absorbing structure |
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