A nonlinear beam model of photomotile structures
| Autor: | Alexa S. Kuenstler, Kevin Korner, Basile Audoly, Kaushik Bhattacharya, Ryan C. Hayward |
|---|---|
| Přispěvatelé: | Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Photon
Acoustics Actuation [PHYS.MPHY]Physics [physics]/Mathematical Physics [math-ph] Soft robotics 02 engineering and technology Deformation (meteorology) Propulsion [SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph] Interference (wave propagation) 01 natural sciences law.invention Computer Science::Robotics law 0103 physical sciences 010306 general physics Photomechanical materials Physics Coupling Optical fiber cable Multidisciplinary Azobenzene Liquid crystal elastomers Propul- sion 021001 nanoscience & nanotechnology Power (physics) Periodic function [SPI.MECA.STRU]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Structural mechanics [physics.class-ph] Physical Sciences 0210 nano-technology |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2020, 117 (18), pp.9762. ⟨10.1073/pnas.1915374117⟩ Proc Natl Acad Sci U S A |
| ISSN: | 0027-8424 1091-6490 |
| DOI: | 10.1073/pnas.1915374117⟩ |
| Popis: | International audience; Actuation remains a significant challenge in soft robotics. Actuation by light has important advantages: Objects can be actuated from a distance, distinct frequencies can be used to actuate and control distinct modes with minimal interference, and significant power can be transmitted over long distances through corrosion-free, lightweight fiber optic cables. Photochemical processes that directly convert photons to configurational changes are particularly attractive for actuation. Various works have reported light-induced actuation with liquid crystal elastomers combined with azobenzene photochromes. We present a simple model-ing framework and a series of examples that study actuation by light. Of particular interest is the generation of cyclic or periodic motion under steady illumination. We show that this emerges as a result of a coupling between light absorption and deformation. As the structure absorbs light and deforms, the conditions of illumination change, and this, in turn, changes the nature of further deformation. This coupling can be exploited in either closed structures or with structural instabilities to generate cyclic motion. |
| Databáze: | OpenAIRE |
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