Negative linear compressibility of hexagonal honeycombs and related systems

[Display omitted] ► Negative compressibility is a very rare and unexpected mechanical property. ► We model the compressibility properties of hexagonal honeycombs and related structures. ► Required conditions for negative compressibility from such structures are identified. ► Proposed model can expla...

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Published in:Scripta materialia 2011-10, Vol.65 (7), p.565-568
Main Authors: Grima, Joseph N., Attard, Daphne, Caruana-Gauci, Roberto, Gatt, Ruben
Format: Article
Language:English
Subjects:
Analytical methods
Compressibility
Compressive properties
Deformation
Elastic behaviour
Honeycomb
Honeycomb construction
Honeycomb structure
Hydrostatics
Modelling
Negative compressibility
Poissons ratio
Ribs
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description [Display omitted] ► Negative compressibility is a very rare and unexpected mechanical property. ► We model the compressibility properties of hexagonal honeycombs and related structures. ► Required conditions for negative compressibility from such structures are identified. ► Proposed model can explain negative compressibility properties in existing materials. ► Model can be used as blueprint for new negative compressibility materials. Materials exhibiting negative linear compressibility display the very unusual and unexpected property of expanding in at least one direction when placed under compressive hydrostatic stress. Here, it is shown that this property may be manifested by systems having high positive Poisson’s ratios (non-auxetic), including non re-entrant hexagonal honeycombs and wine-rack models where deformation primarily involves changes in the angles between the ribs of the structures.
doi_str_mv 10.1016/j.scriptamat.2011.06.011
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subjects Analytical methods
Compressibility
Compressive properties
Deformation
Elastic behaviour
Honeycomb
Honeycomb construction
Honeycomb structure
Hydrostatics
Modelling
Negative compressibility
Poissons ratio
Ribs
title Negative linear compressibility of hexagonal honeycombs and related systems
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