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A group of three-dimensional hollow porous structures with isotropic properties

A hollow porous, isotropic technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problem that structural anisotropy cannot meet application requirements, and achieve the effect of broadening the application field.

Active Publication Date: 2020-11-10
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the fields of energy absorption and impact resistance, due to the uncertainty of the external impact load on the structure, the anisotropy of the structure cannot meet its application requirements

Method used

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  • A group of three-dimensional hollow porous structures with isotropic properties
  • A group of three-dimensional hollow porous structures with isotropic properties
  • A group of three-dimensional hollow porous structures with isotropic properties

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Experimental program
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Effect test

Embodiment 1

[0059] see Figure 1-8 , a group of three-dimensional hollow porous structures with isotropic properties, which include isotropic hollow porous structures generated by IWP-type, Gyroid-type, Primitive-type, Dimond-type and S-type minimal surfaces. The five hollow porous structures are composed of the same type Two basic structures with different parameters are generated, and the hollowing of the three-dimensional porous structure is realized by performing Boolean operations on the structures of the two specific parameters, and the obtained hollow porous structure has isotropic properties; at the same time, the five hollow porous structures have Each has unique structural characteristics and properties, and has different isotropic properties under different volume fractions.

[0060] Further, the basic structure function of two different specific parameters is a level set function, and the Boolean operation expression for generating hollow porous structure is F=min(F(x, y, z, t...

Embodiment 2

[0073] Gyroid-type hollow porous structure is characterized in that it presents a spiral shape in space, and the outer contour of the structure presents a spiral pattern, which is generated by two sets of Gyroid-type minimal surface structures with different parameters through Boolean operations; Gyroid-type minimal surface unit cell structure The expression of the function is:

[0074]

[0075] When the volume fraction is 0.2, the level parameter t 1 is -2.4638±0.1, the level parameter t 2 is 3.714±0.1, Zener ratio is 1.1108±0.02;

[0076] When the volume fraction is 0.3, the level parameter t 1 is -4.0192±0.1, the level parameter t 2 is 5.1667±0.1, Zener ratio is 1.1302±0.02;

[0077] When the volume fraction is 0.4, the level parameter t 1 is -7.0533±0.1, the level parameter t 2 is 5.1375±0.1, Zener ratio is 1.136±0.02;

[0078] When the volume fraction is 0.5, the level parameter t 1 is -6.3741±0.1, the level parameter t 2 is 8.7823±0.1, Zener ratio is 1.1273±0...

Embodiment 3

[0082] The primitive hollow porous structure is characterized in that the supports protruding in the six positive directions in space are all in contact with the six surfaces, and there is an open hole in the structure that is the same as the basic structure, and it is composed of two sets of different parameters. The primitive type minimal surface structure is generated by Boolean operations; the expression of the function of the primitive type minimal surface unit cell structure is:

[0083]

[0084] When the volume fraction is 0.2, the level parameter t 1 is -14.348±0.1, the horizontal parameter t 2 is -6.0601±0.1, Zener ratio is 0.9758±0.02;

[0085] When the volume fraction is 0.3, the level parameter t 1is -15.858±0.1, the level parameter t 2 is -3.3549±0.1, Zener ratio is 0.9708±0.02;

[0086] When the volume fraction is 0.4, the level parameter t 1 is -17.24±0.1, the level parameter t 2 is -0.4946±0.1, Zener ratio is 0.9603±0.02;

[0087] When the volume frac...

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Abstract

The invention discloses a group of three-dimensional hollow porous structures with isotropic properties, which comprises five different three-dimensional hollow porous structures, namely an isotropichollow porous structure generated by an IWP type, a Gyandroid type, a Primitive type, a Dimond type and an S type minimal curved surface. According to the method, Boolean operation is carried out on the minimal curved surface structure with specific parameters to obtain the topological configuration of the three-dimensional hollow porous structure under different volume fractions, and the obtainedthree-dimensional porous structure has isotropic properties, so that reference is provided for the design of various three-dimensional isotropic porous structures; certain application prospects are realized in the fields of light weight, bearing, energy absorption and impact resistance.

Description

technical field [0001] The invention belongs to the technical field of structure optimization, and in particular relates to an isotropic hollow porous structure. Background technique [0002] In the fields of energy absorption and impact resistance, due to the uncertainty of the external impact load on the structure, the anisotropy of the structure cannot meet its application requirements. In order to avoid structural damage caused by the uncertainty of external loads, researchers and designers began to focus on the isotropic optimization of structures. The isotropy of the structure ensures the uniform performance of the structure in all directions, and can effectively ensure that the structure will not be partially damaged due to insufficient performance of the structure when it is subjected to external impact loads. [0003] As a lightweight and high-performance structure, the hollow structure has been widely used in the fields of light weight, load bearing and energy abs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/10G06T17/30
CPCG06T17/10G06T17/30
Inventor 付君健孙鹏飞罗明亮张跃杜义贤田启华
Owner CHINA THREE GORGES UNIV
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