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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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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 double-material high-rigidity porous negative-Poisson's-ratio cell and a structural component thereof belong to the technical field of elastomeric material science. The cell of a rectangular ambulatory plane structure comprises two lateral sides in mirroring symmetry and two crossbeams in parallel symmetry, the lateral sides made of double materials present a negative Poisson's ratio effect. Thestructural component of the double-material high-rigidity porous negative-Poisson's-ratio cell is of a stereoscopic structure, and is formed by arranging multiple double-material high-rigidity porousnegative-Poisson's-ratio cells in a 3D manner. The finite element value of the structural component is simulated, it is verified that the structural component has the negative Poisson's ratio effectand a higher rigidity compared with a traditional honeycomb structure, the high-rigidity structural design broadens the application range of the negative Poisson's ratio structure, and functions including damping and energy absorbing can be realized according to change of adaptive rigidity 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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