Please use this identifier to cite or link to this item: https://www.um.edu.mt/library/oar/handle/123456789/18642
Title: Modelling and testing of a foldable macrostructure exhibiting auxetic behaviour
Authors: Grima, Joseph N.
Ravirala, Naveen
Galea, Romina
Ellul, Brian
Attard, Daphne
Gatt, Ruben
Alderson, Andrew
Rasburn, John
Evans, Kenneth E.
Keywords: Metamaterials
Materials -- Mechanical properties
Chemical models
Calixarenes
Issue Date: 2011-01
Publisher: Wiley-VCH
Citation: Grima, J. N., Ravirala, N., Galea, R., Ellul, B., Attard, D., Gatt, R., ... Evans, K. E. (2011). Modelling and testing of a foldable macrostructure exhibiting auxetic behaviour. Physica Status Solidi (b), 248(1), 117-122.
Abstract: Auxetics exhibit the anomalous property of getting fatter rather than thinner when uniaxially stretched [negative Poisson's ratio (NPR)]. This paper presents an analytical model of a structure constructed from umbrella type sub-units which is predicted to exhibit this property together with the results of mechanical tests of a structure having this geometry. It is shown that such systems can exhibit negative on-axis Poisson's ratio of −1 which means that they maintain their aspect ratio, while Poisson's ratio becomes less negative for loading off-axis. It is also shown that this model can explain the sign and anisotropy of Poisson's ratio demonstrated by a molecular level system constructed from calix(4)arenes having the same geometry.
URI: https://www.um.edu.mt/library/oar//handle/123456789/18642
Appears in Collections:Scholarly Works - FacEngME
Scholarly Works - FacSciChe
Scholarly Works - FacSciMet

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