Please use this identifier to cite or link to this item: https://www.um.edu.mt/library/oar/handle/123456789/18956
Title: Unimode metamaterials exhibiting negative linear compressibility and negative thermal expansion
Authors: Dudek, Krzysztof
Attard, Daphne
Caruana-Gauci, Roberto
Wojciechowski, Krzysztof W.
Grima, Joseph N.
Keywords: Metamaterials
Expansion (Heat)
Compressibility
Rotational motion (Rigid dynamics)
Issue Date: 2016
Publisher: IOP Publishing
Citation: Dudek, K., Attard, D., Caruana-Gauci, R., Wojciechowski, K. W., & Grima, J. N. (2016). Unimode metamaterials exhibiting negative linear compressibility and negative thermal expansion. Smart Materials and Structures, 25(2), 1-9.
Abstract: Unimode metamaterials made from rotating rigid triangles are analysed mathematically for their mechanical and thermal expansion properties. It is shown that these unimode systems exhibit positive Poisson's ratios irrespective of size, shape and angle of aperture, with the Poisson's ratio exhibiting giant values for certain conformations. When the Poisson's ratio in one loading direction is larger than +1, the systems were found to exhibit the anomalous property of negative linear compressibility along this direction, that is, the systems expand in this direction when hydrostatically compressed. Also discussed are the thermal expansion properties of these systems under the assumption that the units exhibit increased rotational agitation once subjected to an increase in temperature. The effect of the geometric parameters on the aforementioned thermo-mechanical properties of the system, are discussed, with the aim of identifying negative behaviour.
URI: https://www.um.edu.mt/library/oar//handle/123456789/18956
Appears in Collections:Scholarly Works - FacSciChe
Scholarly Works - FacSciMet

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