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Magneto-active elastic shells with tunable buckling strength

Shell buckling is central in many biological structures and advanced functional materials, even if, traditionally, this elastic instability has been regarded as a catastrophic phenomenon to be avoided for engineering structures. Either way, predicting critical buckling conditions remains a long-stan...

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Autores principales: Yan, Dong, Pezzulla, Matteo, Cruveiller, Lilian, Abbasi, Arefeh, Reis, Pedro M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8121925/
https://www.ncbi.nlm.nih.gov/pubmed/33990557
http://dx.doi.org/10.1038/s41467-021-22776-y
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author Yan, Dong
Pezzulla, Matteo
Cruveiller, Lilian
Abbasi, Arefeh
Reis, Pedro M.
author_facet Yan, Dong
Pezzulla, Matteo
Cruveiller, Lilian
Abbasi, Arefeh
Reis, Pedro M.
author_sort Yan, Dong
collection PubMed
description Shell buckling is central in many biological structures and advanced functional materials, even if, traditionally, this elastic instability has been regarded as a catastrophic phenomenon to be avoided for engineering structures. Either way, predicting critical buckling conditions remains a long-standing challenge. The subcritical nature of shell buckling imparts extreme sensitivity to material and geometric imperfections. Consequently, measured critical loads are inevitably lower than classic theoretical predictions. Here, we present a robust mechanism to dynamically tune the buckling strength of shells, exploiting the coupling between mechanics and magnetism. Our experiments on pressurized spherical shells made of a hard-magnetic elastomer demonstrate the tunability of their buckling pressure via magnetic actuation. We develop a theoretical model for thin magnetic elastic shells, which rationalizes the underlying mechanism, in excellent agreement with experiments. A dimensionless magneto-elastic buckling number is recognized as the key governing parameter, combining the geometric, mechanical, and magnetic properties of the system.
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spelling pubmed-81219252021-05-18 Magneto-active elastic shells with tunable buckling strength Yan, Dong Pezzulla, Matteo Cruveiller, Lilian Abbasi, Arefeh Reis, Pedro M. Nat Commun Article Shell buckling is central in many biological structures and advanced functional materials, even if, traditionally, this elastic instability has been regarded as a catastrophic phenomenon to be avoided for engineering structures. Either way, predicting critical buckling conditions remains a long-standing challenge. The subcritical nature of shell buckling imparts extreme sensitivity to material and geometric imperfections. Consequently, measured critical loads are inevitably lower than classic theoretical predictions. Here, we present a robust mechanism to dynamically tune the buckling strength of shells, exploiting the coupling between mechanics and magnetism. Our experiments on pressurized spherical shells made of a hard-magnetic elastomer demonstrate the tunability of their buckling pressure via magnetic actuation. We develop a theoretical model for thin magnetic elastic shells, which rationalizes the underlying mechanism, in excellent agreement with experiments. A dimensionless magneto-elastic buckling number is recognized as the key governing parameter, combining the geometric, mechanical, and magnetic properties of the system. Nature Publishing Group UK 2021-05-14 /pmc/articles/PMC8121925/ /pubmed/33990557 http://dx.doi.org/10.1038/s41467-021-22776-y Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Yan, Dong
Pezzulla, Matteo
Cruveiller, Lilian
Abbasi, Arefeh
Reis, Pedro M.
Magneto-active elastic shells with tunable buckling strength
title Magneto-active elastic shells with tunable buckling strength
title_full Magneto-active elastic shells with tunable buckling strength
title_fullStr Magneto-active elastic shells with tunable buckling strength
title_full_unstemmed Magneto-active elastic shells with tunable buckling strength
title_short Magneto-active elastic shells with tunable buckling strength
title_sort magneto-active elastic shells with tunable buckling strength
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8121925/
https://www.ncbi.nlm.nih.gov/pubmed/33990557
http://dx.doi.org/10.1038/s41467-021-22776-y
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