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Foldable structure with negative poisson ratio based on rigid origami

A negative Poisson's ratio, rigid technology, applied in the direction of cardboard articles, etc., can solve the problems of difficult to accurately control the folding and unfolding process, application restrictions, large elastic-plastic deformation of unfolding and folding materials, etc. Transport and storage, easy-to-use effects

Active Publication Date: 2019-03-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing foldable structures based on origami structures can be applied in aerospace, construction and other fields. Although the origami structures designed by Guest and Pellegririno, Nojima and Furuya in recent years also have the characteristics of unfolding and folding, these studies The unfolding and folding of the unfolding structure in the paper depends on the elastic-plastic large deformation of the material, and it is difficult to precisely control the unfolding process, so its application is limited.

Method used

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  • Foldable structure with negative poisson ratio based on rigid origami
  • Foldable structure with negative poisson ratio based on rigid origami
  • Foldable structure with negative poisson ratio based on rigid origami

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] diagram 2-1 Shown is the first foldable structure A1, which consists of four basic units; Figure 2-2 is the basic unit B1 of A1; Figure 2-3 It is the folding unit C1 of A1, and the common sides connecting different parallelogram units constitute the mountain line crease and the valley line crease of folding unit C1. C1 has twelve creases in total, which are the first mountain line 1H1, the second Mountain line 1H2, third mountain line 1H3, fourth mountain line 1H4, fifth mountain line 1H5, first valley line 1V1, second valley line 1V2, third valley line 1V3, fourth valley line 1V4, fifth valley line 1V5, the sixth valley line 1V6 and the seventh valley line 1V7, wherein the first, second, third valley line and the fifth valley line intersect to form the first apex 1P1; Figures 2-4 to 2-8 is the folding process of A1, where Figure 2-4 and 2-8 Shown are the two planar states of A1.

Embodiment 2

[0044] Such as Figure 3-1 Shown is the second foldable structure A2, which consists of four basic units; Figure 3-2 is the basic unit B2 of A2; Figure 3-3 is the folding unit C2 of A2, and the common sides connecting different parallelogram units form the mountain line crease and valley line crease of folding unit C2 respectively. C2 has a total of 22 creases, which are the first mountain line 2H1, Second mountain line 2H2, third mountain line 2H3, fourth mountain line 2H4, fifth mountain line 2H5, sixth mountain line 2H6, seventh mountain line 2H7, eighth mountain line 2H8, ninth mountain line 2H9, tenth mountain line Line 2H10, Eleventh Mountain Line 2H11, Twelfth Mountain Line 2H12, First Valley Line 2V1, Second Valley Line 2V2, Third Valley Line 2V3, Fourth Valley Line 2V4, Fifth Valley Line 2V5, Sixth Valley Line Line 2V6, the seventh valley line 2V7, the eighth valley line 2V8, the ninth valley line 2V9 and the tenth valley line 2V10, where the fourth, sixth, sevent...

Embodiment 3

[0046] Such as Pic 4-1 Shown is the third foldable structure A3, which consists of four basic units; Figure 4-2 is the basic unit B3 of A3; Figure 4-3 is the folding unit C3 of A3, and the common sides connecting different parallelogram units form the mountain line creases and valley line creases of the folding unit C3 respectively. C3 has sixty-two creases in total, which are the first mountain line 3H1, Second mountain line 3H2, third mountain line 3H3, fourth mountain line 3H4, fifth mountain line 3H5, sixth mountain line 3H6, seventh mountain line 3H7, eighth mountain line 3H8, ninth mountain line 3H9, tenth mountain line Line 3H10, the eleventh mountain line 3H11, the twelfth mountain line 3H12, the thirteenth mountain line 3H13, the fourteenth mountain line 3H14, the fifteenth mountain line 3H15, the sixteenth mountain line 3H16, the seventeenth mountain line 3H17, 18th mountain line 3H18, 19th mountain line 3H19, 20th mountain line 3H20, 21st mountain line 3H21, 22...

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Abstract

The invention discloses a foldable structure with a negative poisson ratio based on rigid origami. The foldable structure is formed by stacking N (N is more than or equal to1) basic units up and down,and each basic unit is symmetric to the adjacent basic unit in an up and down mode. Each basic unit is formed by repeatedly arranging one type of folding units, and each folding unit is composed of afirst unit and a second unit which both are parallelogram units. The side lengths of the parallelogram units are first side lengths and second side lengths, the adjacent parallelogram units are connected by a set of common edges of equal length, and the adjacent parallelogram units connected through the set of common edges are of different types, namely, the first units can only be connected withthe second units through the common edges. The four common edges intersect to form a vertex of the corresponding folding unit, and for four the common edges intersecting at each vertex, the common edges constitute mountain line creases and valley line creases of the corresponding folding unit separately.

Description

technical field [0001] The invention relates to a foldable structure with a single degree of freedom and a large folding-to-expand ratio, in particular to a rigid origami-based structure with a negative Poisson's ratio that can be unfolded and folded with a single degree of freedom. Background technique [0002] Origami structures have a wide range of engineering applications. The origami structure has the characteristics of easy unfolding and folding, relatively large folding, and simple structure. Origami-based foldable structures are widely used in aerospace, architectural structures, artworks and daily life due to their advantages of easy production, convenient storage and transportation, high folding-expand ratio, and easy disassembly. [0003] Existing foldable structures based on origami structures can be applied in aerospace, construction and other fields. Although the origami structures designed by Guest and Pellegririno, Nojima and Furuya in recent years also have...

Claims

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Application Information

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IPC IPC(8): B31D5/04
CPCB31D5/04
Inventor 陈焱吕玮琳彭睿马家耀
Owner TIANJIN UNIV
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