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Double-arrow type negative poisson ratio honeycomb sandwich plate

A honeycomb sandwich panel, negative Poisson's ratio technology, applied in the direction of layered products, metal layered products, superstructure sub-assembly, etc. Strong impact performance and strong buffering effect

Pending Publication Date: 2022-03-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above technical problems, the present invention designs a double-arrow type negative Poisson's ratio honeycomb sandwich panel, and rebuilds the internal structure of the panel to solve the problem that safety and light weight cannot be balanced in automobile design and manufacturing.

Method used

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  • Double-arrow type negative poisson ratio honeycomb sandwich plate
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Examples

Experimental program
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Effect test

Embodiment 1

[0034] refer to Figure 1 to Figure 9 As shown, a double-arrow type negative Poisson's ratio honeycomb sandwich panel is characterized in that it includes: an upper panel 1, a sandwich layer 2, and a lower panel 3;

[0035] The sandwich layer 2 is placed between the upper panel and the lower panel, and is fixedly connected to the upper panel and the lower panel;

[0036] The sandwich layer 2 is a double-arrow-shaped negative Poisson's ratio honeycomb layer, which is composed of double-arrow-shaped negative Poisson's ratio cells regularly arranged and vertically arranged between the upper panel 1 and the lower panel 3; the sandwich layer 2 Double-arrow design, when impacted, its cushioning, shock resistance, and impact resistance are stronger than some traditional sandwich structures. When used in automobiles, it can better collapse and absorb energy, while taking into account the lightweight design. Principle, reducing vehicle curb weight is beneficial to improve fuel economy...

Embodiment 2

[0046] This embodiment is the application of a double-arrow type negative Poisson's ratio honeycomb sandwich panel in an automobile energy-absorbing box;

[0047] The automobile energy-absorbing box is mainly to absorb and consume the energy brought by the external impact quickly when the automobile is subjected to an external impact load. The double-arrow type negative Poisson's ratio honeycomb sandwich panel described in Example 1 is used for automobile energy absorption According to the needs, the number of layers of the double-arrow-shaped sandwich layer can be appropriately selected to meet the assembly requirements of the crash-proof box; according to the impact simulation results in Example 1, it can be seen that the single-layer double-arrow-shaped negative Poisson’s ratio The energy absorption rate of the honeycomb sandwich layer has increased by 46% compared with the traditional one. The use of multi-layer sandwich layers can maximize the ability of the car's energy-a...

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Abstract

The invention discloses a double-arrow type negative poisson ratio honeycomb sandwich plate which is characterized by comprising an upper panel, a sandwich core and a lower panel, the sandwich is arranged between the upper panel and the lower panel and is fixedly connected with the upper panel and the lower panel; the sandwich layer is in a double-arrow-shaped negative poisson ratio honeycomb layer shape and is formed by regularly arranging double-arrow-shaped negative poisson ratio cell elements and vertically arranging the double-arrow-shaped negative poisson ratio cell elements between the upper panel and the lower panel; the double-arrow-shaped negative Poisson's ratio honeycomb sandwich plate is composed of the upper aluminum alloy panel, the lower aluminum alloy panel and the middle double-arrow-shaped negative Poisson's ratio honeycomb sandwich layer, a double-arrow-shaped structure is used as a cell element, the double-arrow-shaped structure has the negative Poisson's ratio effect, when the double-arrow-shaped structure is pressed, the two tail ends of an arrow draw close to the inner side, and the negative Poisson's ratio of the double-arrow-shaped structure is increased. Compared with a traditional laminated plate interlayer mode, buffering, vibration reduction and impact resistance are higher.

Description

technical field [0001] The invention belongs to the technical field of honeycomb sandwich structures, in particular to a double-arrow type negative Poisson's ratio honeycomb sandwich board. Background technique [0002] In nature, most natural materials have a positive Poisson's ratio. The so-called Poisson's ratio represents the transverse strain of the material in the direction of elastic loading (ε x ) and longitudinal strain (ε y ) The negative number of the ratio, namely v=-ε x / ε y , when negative Poisson's ratio metamaterials are stretched (or compressed) in the axial direction, they have mechanical properties of expansion (or contraction) in the vertical direction. Since some scholars first prepared negative Poisson's ratio materials with special microstructure in 1897, the research on the structure of negative Poisson's ratio metamaterials has also begun to flourish. Due to their unique physical, mechanical and deformation mechanisms, negative Poisson's ratio met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B3/12B32B15/04B32B15/20B62D25/00B60R19/34
CPCB32B3/12B32B15/04B32B15/20B62D25/00B60R19/34B32B2307/56B32B2307/558
Inventor 付涛李斌于印鑫余阳胡旭初赵冠虓
Owner KUNMING UNIV OF SCI & TECH
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