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Evidence of negative Poisson's ratio in wood from finite element analysis and off-axis compression experiments

Marmier, Arnaud; Biesheuvel, Stefan; Elmalik, Mohamedosman; Kirke, Alexander; Langhof, Max; Paiva, Joao Pedro; Toudup, Joshua; Evans, Kenneth E.

Evidence of negative Poisson's ratio in wood from finite element analysis and off-axis compression experiments Thumbnail


Authors

Arnaud Marmier Arnaud.Marmier@uwe.ac.uk
Senior Lecturer in Mechanical Engineering

Stefan Biesheuvel

Mohamedosman Elmalik

Alexander Kirke

Max Langhof

Joao Pedro Paiva

Joshua Toudup

Kenneth E. Evans



Abstract

© 2017 The microstructure of wood is highly anisotropic, which suggests that this material could exhibit unusual elastic properties. A few studies have suggested the possibility of auxeticity, or negative Poisson's ratio (NPR) in some wood samples. In order to conclusively confirm that wood does show NPR, we have used a combination of geometric modelling, finite element analysis (FEA) and off-axis compression testing. The geometric model indicates that idealised thin-walled wood cell structures should generate NPR of −1, FEA suggests that more realistic cell arrays can attain NPR, to −0.27, and compression tests show that some NPR – to −0.74 – remains in real wood samples. These results could help design “engineered-wood” laminates products with tailored elastic properties.

Journal Article Type Article
Acceptance Date Sep 4, 2017
Online Publication Date Sep 7, 2017
Publication Date Jan 1, 2018
Deposit Date Sep 14, 2017
Publicly Available Date Sep 7, 2018
Journal Materials Letters
Print ISSN 0167-577X
Electronic ISSN 1873-4979
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 210
Pages 255-257
DOI https://doi.org/10.1016/j.matlet.2017.09.026
Keywords structural, negative poisson's ratio, simulation and modelling, elastic properties
Public URL https://uwe-repository.worktribe.com/output/872600
Publisher URL http://dx.doi.org/10.1016/j.matlet.2017.09.026
Contract Date Sep 14, 2017

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