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Sequential metamaterials with alternating Poisson’s ratios
Mechanical metamaterials have been designed to achieve custom Poisson’s ratios via the deformation of their microarchitecture. These designs, however, have yet to achieve the capability of exhibiting Poisson’s ratios that alternate by design both temporally and spatially according to deformation. Th...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8873317/ https://www.ncbi.nlm.nih.gov/pubmed/35210416 http://dx.doi.org/10.1038/s41467-022-28696-9 |
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author | Farzaneh, Amin Pawar, Nikhil Portela, Carlos M. Hopkins, Jonathan B. |
author_facet | Farzaneh, Amin Pawar, Nikhil Portela, Carlos M. Hopkins, Jonathan B. |
author_sort | Farzaneh, Amin |
collection | PubMed |
description | Mechanical metamaterials have been designed to achieve custom Poisson’s ratios via the deformation of their microarchitecture. These designs, however, have yet to achieve the capability of exhibiting Poisson’s ratios that alternate by design both temporally and spatially according to deformation. This capability would enable dynamic shape-morphing applications including smart materials that process mechanical information according to multiple time-ordered output signals without requiring active control or power. Herein, both periodic and graded metamaterials are introduced that leverage principles of differential stiffness and self-contact to passively achieve sequential deformations, which manifest as user-specified alternating Poisson’s ratios. An analytical approach is provided with a complementary software tool that enables the design of such materials in two- and three-dimensions. This advance in design capability is due to the fact that the tool computes sequential deformations more than an order of magnitude faster than contemporary finite-element packages. Experiments on macro- and micro-scale designs validate their predicted alternating Poisson’s ratios. |
format | Online Article Text |
id | pubmed-8873317 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-88733172022-03-17 Sequential metamaterials with alternating Poisson’s ratios Farzaneh, Amin Pawar, Nikhil Portela, Carlos M. Hopkins, Jonathan B. Nat Commun Article Mechanical metamaterials have been designed to achieve custom Poisson’s ratios via the deformation of their microarchitecture. These designs, however, have yet to achieve the capability of exhibiting Poisson’s ratios that alternate by design both temporally and spatially according to deformation. This capability would enable dynamic shape-morphing applications including smart materials that process mechanical information according to multiple time-ordered output signals without requiring active control or power. Herein, both periodic and graded metamaterials are introduced that leverage principles of differential stiffness and self-contact to passively achieve sequential deformations, which manifest as user-specified alternating Poisson’s ratios. An analytical approach is provided with a complementary software tool that enables the design of such materials in two- and three-dimensions. This advance in design capability is due to the fact that the tool computes sequential deformations more than an order of magnitude faster than contemporary finite-element packages. Experiments on macro- and micro-scale designs validate their predicted alternating Poisson’s ratios. Nature Publishing Group UK 2022-02-24 /pmc/articles/PMC8873317/ /pubmed/35210416 http://dx.doi.org/10.1038/s41467-022-28696-9 Text en © The Author(s) 2022 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 Farzaneh, Amin Pawar, Nikhil Portela, Carlos M. Hopkins, Jonathan B. Sequential metamaterials with alternating Poisson’s ratios |
title | Sequential metamaterials with alternating Poisson’s ratios |
title_full | Sequential metamaterials with alternating Poisson’s ratios |
title_fullStr | Sequential metamaterials with alternating Poisson’s ratios |
title_full_unstemmed | Sequential metamaterials with alternating Poisson’s ratios |
title_short | Sequential metamaterials with alternating Poisson’s ratios |
title_sort | sequential metamaterials with alternating poisson’s ratios |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8873317/ https://www.ncbi.nlm.nih.gov/pubmed/35210416 http://dx.doi.org/10.1038/s41467-022-28696-9 |
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