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&a...
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doaj-1f4d9e2a173648a38c7939e3c7664ed32020-11-24T21:03:46ZengMDPI AGMaterials1996-19442019-12-011317910.3390/ma13010079ma13010079A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative CompressibilityJames N. Grima-Cornish0Joseph N. Grima1Daphne Attard2Metamaterials Unit, Faculty of Science, University of Malta, Msida MSD 2080, MaltaMetamaterials Unit, Faculty of Science, University of Malta, Msida MSD 2080, MaltaMetamaterials Unit, Faculty of Science, University of Malta, Msida MSD 2080, MaltaAuxetics (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.https://www.mdpi.com/1996-1944/13/1/79auxeticnegative poisson’s rationegative compressibility |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
James N. Grima-Cornish Joseph N. Grima Daphne Attard |
spellingShingle |
James N. Grima-Cornish Joseph N. Grima Daphne Attard A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility Materials auxetic negative poisson’s ratio negative compressibility |
author_facet |
James N. Grima-Cornish Joseph N. Grima Daphne Attard |
author_sort |
James N. Grima-Cornish |
title |
A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility |
title_short |
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_sort |
novel mechanical metamaterial exhibiting auxetic behavior and negative compressibility |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-12-01 |
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. |
topic |
auxetic negative poisson’s ratio negative compressibility |
url |
https://www.mdpi.com/1996-1944/13/1/79 |
work_keys_str_mv |
AT jamesngrimacornish anovelmechanicalmetamaterialexhibitingauxeticbehaviorandnegativecompressibility AT josephngrima anovelmechanicalmetamaterialexhibitingauxeticbehaviorandnegativecompressibility AT daphneattard anovelmechanicalmetamaterialexhibitingauxeticbehaviorandnegativecompressibility AT jamesngrimacornish novelmechanicalmetamaterialexhibitingauxeticbehaviorandnegativecompressibility AT josephngrima novelmechanicalmetamaterialexhibitingauxeticbehaviorandnegativecompressibility AT daphneattard novelmechanicalmetamaterialexhibitingauxeticbehaviorandnegativecompressibility |
_version_ |
1716773061480415232 |