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Research Papers: Design Automation

Regular Folding Pattern for Deployable Nonaxisymmetric Tubes1

[+] Author and Article Information
Sachiko Ishida

Assistant Professor
Mem. ASME
Department of Mechanical Engineering,
Meiji University,
1-1-1, Higashimita, Kawasaki,
Kanagawa 2148571, Japan
e-mail: sishida@meiji.ac.jp

Taketoshi Nojima

Meiji Institute for Advanced Study
of Mathematical Sciences,
Meiji University,
4-21-1, Nakano,
Tokyo 1648525, Japan
e-mail: taketoshinojima@gmail.com

Ichiro Hagiwara

Professor
Fellow ASME
Meiji Institute for Advanced Study
of Mathematical Sciences,
Meiji University,
4-21-1, Nakano,
Tokyo 1648525, Japan
e-mail: ihagi@meiji.ac.jp

2Corresponding author.

Contributed by the Design Automation Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received September 22, 2014; final manuscript received July 10, 2015; published online July 28, 2015. Assoc. Editor: Kazuhiro Saitou.

J. Mech. Des 137(9), 091402 (Jul 28, 2015) (9 pages) Paper No: MD-14-1630; doi: 10.1115/1.4031070 History: Received September 22, 2014

This paper presents two techniques for modeling the folding patterns of deployable nonaxisymmetric tubes using regular arrangement of the fold lines and three different fundamental folding designs, namely, Miura folding, bellows folding, and torsional buckling-based folding. The first modeling technique involves the cutting and removal of unnecessary parts from the original folding pattern of the corresponding straight cylinder, and the second technique involves the design of additional fold lines for folding the unnecessary parts into the tube without being cut. The applicability and constraints of each folding design and modeling technique are discussed and summarized.

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References

Figures

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Fig. 1

Folding patterns for foldable cylinders: (a) Miura folding, (b) bellows folding, and (c) torsional buckling-based folding

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Fig. 2

Polyhedral approximation of torus and developed unit pattern (m = 6)

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Fig. 3

Unit patterns for constructing deployable torus: (a) by Miura folding (m = 12), (b) by bellows folding (m = 4), and (c) by torsional buckling-based folding (m = 6)

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Fig. 4

Developed patterns with joint part for connecting two different tubes, and physical model: (a) pattern of torus with joint part obtained by Miura folding, (b) straight cylinder for connection to torus, (c) physical model of two tori connected by cylinder in (1) folded state, (2) expansion state, and (3) expanded state, and (d) strip folding of pattern

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Fig. 5

Deployable pattern of twisting tube, and physical model: (a) pattern with positions of unnecessary parts shifted, (b) physical model of twisted tube in (1) folded state, (2) expansion state, and (3) expanded state, and (c) aerial view of expanded state

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Fig. 6

Physical model of torus: (a) bellows folding pattern, (b) construction by folding pattern, and (c) strip folding of pattern

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Fig. 7

Physical model of torus: (a) torsional buckling-based pattern, (b) construction using folding pattern, and (c) strip folding of pattern

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Fig. 8

Construction of nonaxisymmetric tube using Archimedean spiral: (a) Archimedean spiral (plane view), (b) discrete Archimedean spiral (plane view), and (c) polyhedral Archimedean tube (aerial view)

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Fig. 9

Flat-foldable nonaxisymmetric tube produced from Archimedean spiral: (a) pattern of nonaxisymmetric tube and (b) physical model in (1) folded state, (2) expansion state, and (3) expanded state

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Fig. 10

Flat-foldable toroidal tube: (a) pattern of flat-foldable torus with additional fold lines on subparts (in red) and (b) pattern when (1) folded, (2) subparts are folded to form torus, and (3) fully inflated to form straight cylinder

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Fig. 11

Flat-foldable toroidal tube: (a) pattern of flat-foldable torus with additional fold lines on subparts (in red) and (b) pattern when (1) folded, (2) subparts are folded to form torus, and (3) fully inflated to form straight cylinder

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