Multistable bioinspired origami with reprogrammable self-folding
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Published:2022-10
Issue:195
Volume:19
Page:
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ISSN:1742-5662
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Container-title:Journal of The Royal Society Interface
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language:en
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Short-container-title:J. R. Soc. Interface.
Author:
Rojas Salvador1ORCID,
Riley Katherine S.1ORCID,
Arrieta Andres F.1ORCID
Affiliation:
1. School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA
Abstract
Origami has emerged as a design paradigm to realize morphing structures with rich kinematic and mechanical properties. Biological examples augment the potential design space by suggesting intriguing routes for achieving self-folding from architected materials. We introduce a class of multistable self-folding origami adaptable after fabrication inspired by the earwig wing. This is achieved by designing bilayer creases that display anisotropic shrinkage in response to external stimulation, enabling a mechanism for prestrain adaptation. We establish a bilayer model for stretchable straight and trapezoidal (
β
) creases to generate bistable origami structures. We adapt the topology of the structure’s energy landscapes by tuning the fold prestrain level as a function of the stimulation time. The proposed method and model allows for converting flat sheets with arranged facets and prestrained mountain-valley creases into self-folding multistable structures. Introducing multistability from self-folding avoids ambiguous folding branches present in the rich configuration space at the flat state. The obtained crease prestrain programming is leveraged to manufacture a biomimetic earwig wing featuring the complex crease pattern, structural stability and rapid closure of the biological counterpart. The presented method provides a route for encoding prestrain in self-folding origami, the multistability of which is adaptable after fabrication.
Funder
Purdue University George Washington Carver Fellowship
Indiana Space Grant Consortium
Air Force Office of Scientific Research
National Science Foundation Graduate Research Fellowship
Publisher
The Royal Society
Subject
Biomedical Engineering,Biochemistry,Biomaterials,Bioengineering,Biophysics,Biotechnology
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