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Construction method of high-stability negative Poisson's ratio structure

A technology with negative Poisson's ratio and strong stability. It is applied in the fields of processing and manufacturing, liquid material additive processing, and manufacturing auxiliary devices. It can solve the problems of inability to maintain stability and limited application scenarios, and achieve strong material applicability and enhancement. Stable mechanical properties and structural application effects

Pending Publication Date: 2022-02-08
SOUTHWEST UNIVERSITY
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Problems solved by technology

[0004] In view of this, in order to solve the problem that the existing negative Poisson’s ratio structure materials cannot maintain a stable negative Poisson’s ratio behavior in a large deformation range, resulting in limited application scenarios, the present invention provides a strong stability negative Construction Method of Poisson's Ratio Structure

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  • Construction method of high-stability negative Poisson's ratio structure
  • Construction method of high-stability negative Poisson's ratio structure
  • Construction method of high-stability negative Poisson's ratio structure

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Embodiment 1

[0033] Such as Figure 2~4 The construction method of the strong stability negative Poisson's ratio structure shown, the specific construction method includes the following steps:

[0034] A. Build the basic cell structure model (using Cinema 4D software for modeling): the basic cell structure is composed of four "mountain" lines and four "valley" lines in one vertex, and eight projections add thickness to the surface of the right triangle , the length of the basic cell structure is 282.844 (the following lengths are all proportional lengths, which can be scaled at any ratio), the width is 200, and the aspect ratio is 1.141:1; the thickness and width ratio of the basic cell structure is defined as t / w, t The parameters of / w are 0.15, 0.20, 0.25, 0.30, and 0.35 respectively; the ratio of the degree of depression to the thickness of the basic cell structure is defined as the concave-convex ratio of the basic cell, which is recorded as l / t, and l is set to 20, 10, 0, - 10, -20,...

Embodiment 2

[0046] Such as Figure 5 The difference between Example 2 and Example 1 of the construction method of the strongly stable negative Poisson’s ratio structure is that Step B is: the basic cell structure constructed in Step A through standard software is placed in space along the long symmetry line The directions are periodically arranged to form a two-dimensional plate with a triangular structure that shares one vertex and has a thickness. The overall length of the two-dimensional plate is 1697.064, and the overall width is 1200;

[0047] In step C, choose photocurable resin (Formlabs Flexible) as the raw material for 3D printing; the 3D printer uses a stereolithography 3D printer (Form 2), input a suitable file format and import it into the printing software, set the printing process according to the viscosity flow characteristics of different printing materials, and the printing process There is no need to add any support materials; slice the model, form a printing path, build...

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Abstract

The invention belongs to the technical field of metamaterial structure construction, and relates to a construction method of a high-stability negative Poisson's ratio structure. The whole high-stability negative Poisson's ratio structure is constructed by a repeated basic cell element structure. The specific construction method comprises the steps that a basic cell structure model is constructed, a high-stability three-dimensional negative Poisson's ratio structure is assembled and constructed, and 3D printing is carried out. The construction from negative Poisson's ratio cells to the three-dimensional negative Poisson's ratio structure is designed based on a highly symmetrical structural form in space, and the structural form endows the whole structure with strong surface deformation constraint capability, so that the structure has a good and stable negative Poisson's ratio effect. According to the design method of the high-stability three-dimensional negative Poisson's ratio structure, the problem that the negative Poisson's ratio effect of the negative Poisson's ratio structure is unstable when the negative Poisson's ratio structure is loaded, and actual application requirements cannot be well met is solved, and development and application of negative Poisson's ratio structure materials are promoted.

Description

technical field [0001] The invention belongs to the technical field of metamaterial structure construction, and relates to a construction method of a strongly stable negative Poisson's ratio structure. Background technique [0002] The negative Poisson's ratio effect is mainly produced by its specially designed microstructure, which has excellent mechanical properties due to its unconventional deformation behavior. The negative Poisson's ratio structure has excellent shear resistance, indentation resistance, fracture resistance and It has great advantages in energy absorption performance and other aspects, and its application range also covers medical treatment, cushioning and anti-seismic equipment, intelligent sensing, aerospace, etc. At present, the negative Poisson's ratio cell structures mainly include concave structures, rotating polygonal structures, chiral structures, sheet-like folded structures, etc., and the research on negative Poisson's ratio structures has grad...

Claims

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Application Information

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IPC IPC(8): B29C64/106B29C64/20B29C64/393B33Y10/00B33Y30/00B33Y50/02B33Y80/00
CPCB29C64/106B29C64/20B29C64/393B33Y10/00B33Y30/00B33Y50/02B33Y80/00
Inventor 黄进胡欢甘霖
Owner SOUTHWEST UNIVERSITY
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