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A dual-material large-stiffness porous negative Poisson's ratio cell and its structural components

A technology of negative Poisson's ratio and structural components, applied in the field of dual-material large-stiffness porous negative Poisson's ratio cells and their structural components, can solve problems such as poor structural stiffness and achieve the effect of expanding the scope of application

Active Publication Date: 2020-07-14
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
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Problems solved by technology

[0005] A large number of studies have shown that when the structure of the material has a negative Poisson's ratio effect, the structural stiffness performance is poor, which limits the application of the negative Poisson's ratio structure. Therefore, the present invention researches and designs a dual-material high-rigidity porous negative Poisson's ratio structure , to make up for the shortcomings of poor structural stiffness performance of negative Poisson's ratio

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  • A dual-material large-stiffness porous negative Poisson's ratio cell and its structural components
  • A dual-material large-stiffness porous negative Poisson's ratio cell and its structural components
  • A dual-material large-stiffness porous negative Poisson's ratio cell and its structural components

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Embodiment 1

[0032] A dual-material high-rigidity porous cell with negative Poisson's ratio is a circular structure. The schematic diagram of its geometric structure is shown in figure 2 , which specifically includes two mirror-symmetrically arranged sides and two parallel and symmetrical beams, wherein the sides are composed of double materials, which are double-material sides and present a negative Poisson’s ratio effect;

[0033] Described double material is two kinds of different elastic modulus materials, wherein, the ratio of the elastic modulus of the first elastic modulus material and the elastic modulus of the second elastic modulus material is 10 11 ;

[0034] The side is mainly made of the material with the first elastic modulus, and the second elastic modulus material is arranged at intervals on the inner side and the outer side of the side, wherein, in a single cell, the inner side of the two ends of the side is provided with the second elastic modulus The second elastic mod...

Embodiment 2

[0073] A dual-material high-rigidity porous cell with negative Poisson's ratio is a circular structure. The schematic diagram of its structure is shown in Figure 7 , which specifically includes two mirror-symmetrically arranged sides and two parallel and symmetrical beams, wherein the side is composed of double materials, which is a double-material side and exhibits a negative Poisson’s ratio effect;

[0074] Described double material is two kinds of different elastic modulus materials, and wherein, the ratio of the elastic modulus of the elastic modulus of the first elastic modulus material and the elastic modulus of the second elastic modulus material is 10;

[0075]The sides are alternately arranged inside and outside with the first elastic modulus material and the second elastic modulus material, wherein the second elastic modulus material is arranged at intervals on the inside and outside of the side, wherein, in a single cell, A material with a second modulus of elastic...

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Abstract

A dual-material large-stiffness porous negative Poisson's ratio cell and its structural components belong to the field of elastic material science and technology. This dual-material large-stiffness porous negative Poisson's ratio cell is a loop-shaped structure, including two mirror-symmetrically arranged sides and two parallel and symmetrical beams. The sides are composed of dual materials and are dual-material sides. edge, showing a negative Poisson's ratio effect. The dual-material large-stiffness porous negative Poisson's ratio structural component is a three-dimensional structure, consisting of multiple dual-material large-stiffness porous negative Poisson's ratio cells arranged in three dimensions. Finite element numerical simulations were conducted on this structural component, and the results verified that it has a negative Poisson's ratio effect and has higher stiffness performance than traditional honeycomb structures. This structural design with large stiffness expands the application range of negative Poisson's ratio structures. , and can achieve functions such as shock absorption and energy absorption based on changes in the adaptive stiffness performance of the structure.

Description

technical field [0001] The invention relates to the field of elastic material science and technology, in particular to a double-material large-rigidity porous negative Poisson's ratio cell and its structural components. Background technique [0002] Poisson's ratio was first discovered and proposed by French scientist Simon Poisson (Simon Denis Poisson, 1781-1840), and it is defined as the ratio of negative transverse shrinkage strain to longitudinal elongation strain. [0003] When traditional materials are compressed (stretched), the transverse strain is positive (negative), while the longitudinal strain is negative (positive). It can be seen that the Poisson's ratio of the material is positive. Most materials in nature have a positive Poisson's ratio, and in Around 0.3, 1 / 2 for rubber materials, 0.133 for metal aluminum, 0.127 for copper, and 0.11 to 0.14 for typical polymer foams. For isotropic materials, due to the non-negative requirement of strain energy, the theory ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/20G06T17/10G06F30/23G06F119/14
CPCG06F30/23G06F2119/06G06T17/10G06T17/20
Inventor 李东马杰
Owner NORTHEASTERN UNIV LIAONING
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