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Metamaterial with adjustable pore structure and design method thereof

An open-pore structure, metamaterial technology, applied in computer materials science, design optimization/simulation, informatics, etc., can solve problems such as large nominal strain and limited design space, and achieve increased design space, easy adjustment, and easy adjustment. Effect

Pending Publication Date: 2022-04-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the relatively regular configuration of the uniform periodic opening structure, the theoretical research is relatively simple and the manufacturing is relatively convenient, so the current common porous negative Poisson’s ratio metamaterials are mostly uniform periodic opening. The radius and hole center distance of each row of through holes are the same. Under the same porosity (porosity, refers to the ratio of the sum of the areas of all through holes on the substrate to the total area of ​​the substrate), the open structure is unique, the design space is limited, and the corresponding critical load is also unique. It is difficult to adjust the critical load with a general and efficient strategy according to different application scenarios. In addition, the negative Poisson’s ratio adjustment requires a large nominal strain, so it cannot Better meet application requirements

Method used

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  • Metamaterial with adjustable pore structure and design method thereof
  • Metamaterial with adjustable pore structure and design method thereof
  • Metamaterial with adjustable pore structure and design method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0119] Such as figure 2 As shown, the through holes 2 provided in the surface of the substrate 1 are 9 rows and 9 columns, the number of through holes 2 in each row and column is n=8, the hole center distance D=10mm, the length and width of the substrate 1 Both are 80mm, porosity Tolerance d = 0.05 or common ratio q = 1.01; the shape of each through hole 2 is circular, the number of through holes 2 in each layer is 8, and the center line of all through holes 2 in each layer is "one ", the porosity of two adjacent layers is distributed in one-way equal difference or one-way equal proportion gradient.

Embodiment 2

[0121] Such as image 3 As shown, the through holes 2 provided in the surface of the substrate 1 are 9 rows and 9 columns, the number of through holes 2 in each row and column is n=8, the hole center distance D=10mm, the length and width of the substrate 1 Both are 80mm, porosity Tolerance d=0.05 or common ratio q=1.01; the shape of each through hole 2 is elliptical, the number of through holes 2 in each layer is 8, and the central connection line of all through holes 2 in each layer is "one". ", the porosity of two adjacent layers is distributed in one-way equal difference or one-way equal proportion gradient.

Embodiment 3

[0123] Such as Figure 4 As shown, the through holes 2 provided in the surface of the substrate 1 are 9 rows and 9 columns, the number of through holes 2 in each row and column is n=8, the hole center distance D=10mm, the length and width of the substrate 1 Both are 80mm, porosity Tolerance d=0.05 or common ratio q=1.01; the shape of each through hole 2 is a regular hexagon, the number of through holes 2 in each layer is 8, and the center line of all through holes 2 in each layer is in the shape of " One" shape, the porosity of two adjacent layers is distributed in one-way equal difference or one-way equal ratio gradient.

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PUM

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Abstract

The invention relates to a metamaterial with an adjustable opening structure and a design method thereof, the metamaterial comprises a base material, a plurality of rows and a plurality of columns of through holes are formed in the surface of the base material, and the metamaterial is characterized in that the number of the through holes in each row is the same as the number of the through holes in each column; the hole center distance between every two adjacent through holes in each row is equal to the hole center distance between every two adjacent through holes in each column. The areas of the two through holes located in the same column in the two adjacent rows on the two sides of the base material are different, and the porosity of the two adjacent layers is distributed in a gradient mode so that the hole opening structure of the base material can be adjusted. According to the porous structure, the porous structure can be adjusted in the mode that the porosities of the two adjacent layers are distributed in a gradient mode under the same porosity, so that different critical loads are obtained, the critical load of the base material is adjusted, meanwhile, the negative Poisson's ratio is easier to adjust, and the actual requirement can be better met.

Description

technical field [0001] The invention relates to the field of metamaterial structure design, in particular to a metamaterial with an adjustable opening structure and a design method thereof. Background technique [0002] Negative Poisson's ratio refers to the negative ratio of lateral strain to axial strain when the material is subjected to unidirectional tension or compression, also known as the lateral deformation coefficient, reflecting the elastic constant of the lateral deformation of the material. Materials with negative Poisson's ratio, when stretched transversely, expand and deform along the longitudinal direction, which can induce many abnormal mechanical properties different from natural material properties, such as excellent shear resistance, fracture toughness, piezoresistivity, surface isotropy, and good cushioning and energy-absorbing performance. [0003] Since most materials in nature are positive Poisson's ratio materials, only a limited number of negative P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G16C60/00
Inventor 李冬明王菲郭浩宇杨依茹钱怡成孔令好杜松林
Owner WUHAN UNIV OF TECH