Journal
MECHANICS OF MATERIALS
Volume 46, Issue -, Pages 123-128Publisher
ELSEVIER
DOI: 10.1016/j.mechmat.2011.12.007
Keywords
Negative linear compressibility; Beam structure; Anisotropic elasticity; Finite element; Tetragonal; Stretch densification
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Funding
- Engineering and Physical Sciences Research Council [EP/G064601/1] Funding Source: researchfish
- EPSRC [EP/G064601/1] Funding Source: UKRI
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Most materials compress axially in all directions when loaded hydrostatically. Contrary to this, some materials have been discovered that exhibit negative linear compressibility and, as such, expand along a specific axis or plane. This paper analyses a fundamental mechanism by using a combination of finite element simulations and analytical derivations to show that negative linear compressibility can be found in a body-centred or face-centred tetragonal network of nodes connected by a network of beams. The magnitude and direction of this behaviour depends on the cross geometry in the network. (C) 2012 Elsevier Ltd. All rights reserved.
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