Easy snap-folding of hexagonal ring origami by geometric modifications. (February 2023)
- Record Type:
- Journal Article
- Title:
- Easy snap-folding of hexagonal ring origami by geometric modifications. (February 2023)
- Main Title:
- Easy snap-folding of hexagonal ring origami by geometric modifications
- Authors:
- Lu, Lu
Leanza, Sophie
Dai, Jize
Sun, Xiaohao
Zhao, Ruike Renee - Abstract:
- Abstract: Hexagonal ring origami is a type of foldable structure that has impressive packing abilities and can be tessellated into two-dimensional or three-dimensional surfaces without any gap or overlap. It can be folded under bending or twisting loads into a peach core-shaped configuration with only 10.6% of its initial area. However, in applications of large-scale foldable structures, folding by bending or twisting is usually technically difficult. Here, we propose strategies to facilitate easy snap-folding of the hexagonal ring by a simple point load or localized twist or squeeze. This is enabled by two geometric modifications made to the hexagonal ring: introducing residual strain and creating pre-twisted edges. By combining theoretical modeling, finite element simulations, and experiments, we systematically investigate the snap-folding behaviors of modified hexagonal rings with residual strain and pre-twisted edges. It is found that the geometric modifications promote easy snap-folding of the hexagonal ring by different mechanisms: introducing residual strain can significantly decrease the energy barrier and thus reduce the required moment to snap-fold the ring, while creating pre-twisted edges allows for easy out-of-plane deformation which is a necessary condition for a ring to fold. Combining the two methods further enables the snap-folding of the hexagonal ring by a point load or localized twist or squeeze. To demonstrate the easy folding of large assemblies of theAbstract: Hexagonal ring origami is a type of foldable structure that has impressive packing abilities and can be tessellated into two-dimensional or three-dimensional surfaces without any gap or overlap. It can be folded under bending or twisting loads into a peach core-shaped configuration with only 10.6% of its initial area. However, in applications of large-scale foldable structures, folding by bending or twisting is usually technically difficult. Here, we propose strategies to facilitate easy snap-folding of the hexagonal ring by a simple point load or localized twist or squeeze. This is enabled by two geometric modifications made to the hexagonal ring: introducing residual strain and creating pre-twisted edges. By combining theoretical modeling, finite element simulations, and experiments, we systematically investigate the snap-folding behaviors of modified hexagonal rings with residual strain and pre-twisted edges. It is found that the geometric modifications promote easy snap-folding of the hexagonal ring by different mechanisms: introducing residual strain can significantly decrease the energy barrier and thus reduce the required moment to snap-fold the ring, while creating pre-twisted edges allows for easy out-of-plane deformation which is a necessary condition for a ring to fold. Combining the two methods further enables the snap-folding of the hexagonal ring by a point load or localized twist or squeeze. To demonstrate the easy folding of large assemblies of the modified rings, we construct various structures that can be snap-folded from their initial three-dimensional states to significantly lower-volume final states by a simple compression at the corners of the rings. We envision that the proposed geometric modification strategies can provide a new perspective on the rational design of easy-to-fold ring origami-based foldable functional structures with extremely high packing ratios. … (more)
- Is Part Of:
- Journal of the mechanics and physics of solids. Volume 171(2023)
- Journal:
- Journal of the mechanics and physics of solids
- Issue:
- Volume 171(2023)
- Issue Display:
- Volume 171, Issue 2023 (2023)
- Year:
- 2023
- Volume:
- 171
- Issue:
- 2023
- Issue Sort Value:
- 2023-0171-2023-0000
- Page Start:
- Page End:
- Publication Date:
- 2023-02
- Subjects:
- Origami -- Hexagonal ring -- Snap-folding -- Residual strain -- Pre-twist
Mechanics, Applied -- Periodicals
Solids -- Periodicals
Mechanics -- Periodicals
Mécanique appliquée -- Périodiques
Solides -- Périodiques
Mechanics, Applied
Solids
Periodicals
531.05 - Journal URLs:
- http://www.sciencedirect.com/science/journal/00225096 ↗
http://www.elsevier.com/journals ↗ - DOI:
- 10.1016/j.jmps.2022.105142 ↗
- Languages:
- English
- ISSNs:
- 0022-5096
- Deposit Type:
- Legaldeposit
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- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 5016.000000
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British Library HMNTS - ELD Digital store - Ingest File:
- 24717.xml