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A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility

Auxetics (negative Poisson’s ratio) and materials with negative linear compressibility (NLC) exhibit the anomalous mechanical properties of getting wider rather than thinner when stretched and expanding in at least one direction under hydrostatic pressure, respectively. A novel mechanism—termed the...

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Detalles Bibliográficos
Autores principales: Grima-Cornish, James N., Grima, Joseph N., Attard, Daphne
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6982174/
https://www.ncbi.nlm.nih.gov/pubmed/31877886
http://dx.doi.org/10.3390/ma13010079
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author Grima-Cornish, James N.
Grima, Joseph N.
Attard, Daphne
author_facet Grima-Cornish, James N.
Grima, Joseph N.
Attard, Daphne
author_sort Grima-Cornish, James N.
collection PubMed
description Auxetics (negative Poisson’s ratio) and materials with negative linear compressibility (NLC) exhibit the anomalous mechanical properties of getting wider rather than thinner when stretched and expanding in at least one direction under hydrostatic pressure, respectively. A novel mechanism—termed the ‘triangular elongation mechanism’—leading to such anomalous behavior is presented and discussed through an analytical model. Amongst other things, it is shown that this novel mechanism, when combined with the well-known ‘rotating squares’ model, can generate giant negative Poisson’s ratios when the system is stretched.
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spelling pubmed-69821742020-02-07 A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility Grima-Cornish, James N. Grima, Joseph N. Attard, Daphne Materials (Basel) Article Auxetics (negative Poisson’s ratio) and materials with negative linear compressibility (NLC) exhibit the anomalous mechanical properties of getting wider rather than thinner when stretched and expanding in at least one direction under hydrostatic pressure, respectively. A novel mechanism—termed the ‘triangular elongation mechanism’—leading to such anomalous behavior is presented and discussed through an analytical model. Amongst other things, it is shown that this novel mechanism, when combined with the well-known ‘rotating squares’ model, can generate giant negative Poisson’s ratios when the system is stretched. MDPI 2019-12-22 /pmc/articles/PMC6982174/ /pubmed/31877886 http://dx.doi.org/10.3390/ma13010079 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Grima-Cornish, James N.
Grima, Joseph N.
Attard, Daphne
A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility
title A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility
title_full A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility
title_fullStr A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility
title_full_unstemmed A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility
title_short A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility
title_sort novel mechanical metamaterial exhibiting auxetic behavior and negative compressibility
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6982174/
https://www.ncbi.nlm.nih.gov/pubmed/31877886
http://dx.doi.org/10.3390/ma13010079
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