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Negative Poisson's ratio unit cell structure and honeycomb structure with rotation characteristics

A technology of negative Poisson's ratio and rotary structure, which is applied in the direction of elastic shock absorber, spring/shock absorber, shock absorber, etc., and can solve the problems of compression and easy fracture failure, general effect of negative Poisson's ratio characteristics, and stress concentration at joints Large and other problems, to achieve the effect of obvious characteristic effect, high rotational inertia, and stable deformation process

Active Publication Date: 2021-11-19
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the negative Poisson's ratio structures are generally dominated by concave hexagonal structures and star-shaped single-pack structures; Compared with other areas, the thickness is thicker, which will inhibit the tendency of concave deformation to a certain extent, and the stress concentration of the two structures at the joint is relatively large, and it is easy to break and fail when compressed, and the negative Poisson's ratio characteristic effect is general

Method used

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  • Negative Poisson's ratio unit cell structure and honeycomb structure with rotation characteristics
  • Negative Poisson's ratio unit cell structure and honeycomb structure with rotation characteristics
  • Negative Poisson's ratio unit cell structure and honeycomb structure with rotation characteristics

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Embodiment 1

[0032] A negative Poisson's ratio unit cell structure with rotational characteristics in this embodiment includes four helical structural units, and the four helical structural units are distributed in a rectangle; the helical structural unit includes two rotational structural units, and the rotational structural units include Arm, arc bar, the first extension bar, the second extension bar, the third extension bar; one end of the arc bar is connected with one end of the rotating arm; the arc bar is divided into the first arc segment, the second arc segment and The third arc segment; one end of the first extension rod is connected to the first arc segment, and the first extension rod is tangent to the first arc segment; one end of the second extension rod is connected to the second arc segment, and the second extension The rod is tangent to the second arc segment; one end of the third extension rod is connected to the third arc segment, and the third extension rod is tangent to ...

Embodiment 2

[0039] A negative Poisson's ratio honeycomb structure with rotation characteristics adopts a negative Poisson's ratio unit cell structure with rotation characteristics, and the honeycomb structure is formed by arraying a plurality of unit cell structures with the same structure on a horizontal plane.

[0040] The combination mode of the honeycomb structure of the present invention is: the first extension rod, the second extension rod and the third extension rod of the unit cell structure and the first extension rod, the second extension rod and the third extension rod of the adjacent unit cell structure It is fixed on the joint surface, and in this way, the honeycomb structure can be obtained by expanding the arrangement and combination in the horizontal and vertical directions.

[0041] The unit cell structure and honeycomb structure are constructed in the modeling software, the height h is set to 10mm, and the given material is aluminum alloy. The initial construction paramet...

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Abstract

The invention relates to a negative Poisson's ratio unit cell structure with rotation characteristics. The structure comprises four spiral structure units distributed in a rectangular shape, each spiral structure unit comprises two rotary structure units, and in each rotary structure unit, one end of an arc-shaped rod is connected with one end of a rotating arm; a first extension rod, a second extension rod and a third extension rod are all connected and tangent to the arc-shaped rod; the other ends of the rotating arms of the two rotary structure units are connected to form a straight rod, and the arc-shaped rods of the two rotary structure units are oppositely arranged; the three rods extending outwards in the two rotary structure units are parallel to one another; and the adjacent spiral structure units are connected through the corresponding first extension rods or the second extension rods, and the opposite spiral structure units are connected through the corresponding third extension rods. The invention also relates to a negative Poisson's ratio honeycomb structure with rotation characteristics. The structure is obvious in negative Poisson's ratio characteristic effect, and belongs to a negative Poisson's ratio structure.

Description

technical field [0001] The invention relates to a negative Poisson's ratio structure, in particular to a negative Poisson's ratio unit cell structure and a honeycomb structure with gyration characteristics. Background technique [0002] The negative Poisson's ratio effect refers to the phenomenon that when stretched, the material expands laterally within the elastic range, and when compressed, the material shrinks laterally within the elastic range. The negative Poisson's ratio structure exhibits the opposite characteristics when it is subjected to axial load, and its Poisson's ratio is negative. The macroscopic effect produced by this characteristic is that the local density increase of the material under load can gather more material to resist the load, thereby producing higher elastic modulus, shear modulus, shear modulus, storage modulus, and more Good resilience toughness and fracture resistance, and increase with the enhancement of negative Poisson's ratio effect unde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F7/12G10K11/162
CPCF16F7/121F16F7/128G10K11/162F16F2224/0225Y02P10/25
Inventor 李方义陈修杰
Owner GUANGZHOU UNIVERSITY
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