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Auxetic metamaterials inspired from wine-racks

Author:
Roberto Caruana-Gauci, Edera P. Degabriele, Daphne Attard, Joseph N. Grima
Source:
Journal of materials science 2018 v.53 no.7 pp. 5079-5091
ISSN:
0022-2461
Subject:
compressibility, mechanical properties, models
Abstract:
‘Wine-rack’ motifs are formally shown to exhibit the unexpected property of a negative Poisson’s ratio (auxetic behaviour) for loading in particular directions. This property is confirmed through the analysis of analytical expressions for the in-plane off-axis mechanical properties derived for an idealised hinging wine-rack model as well as through molecular simulations of nanoscale molecular systems. It is also shown that auxeticity for loading off-axis complements the more well-known property of negative compressibility demonstrated in other directions which results from the very high positive Poisson’s ratio exhibited on-axis.
Agid:
5889117