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A Novel Mechanical Metamaterial Exhibiting Auxetic Behavior and Negative Compressibility.

Authors :
Grima-Cornish, James N.
Grima, Joseph N.
Attard, Daphne
Source :
Materials (1996-1944). Jan2020, Vol. 13 Issue 1, p79. 1p. 3 Diagrams, 1 Graph.
Publication Year :
2020

Abstract

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19961944
Volume :
13
Issue :
1
Database :
Academic Search Index
Journal :
Materials (1996-1944)
Publication Type :
Academic Journal
Accession number :
141157265
Full Text :
https://doi.org/10.3390/ma13010079