Double-Negative Mechanical Metamaterials Displaying Simultaneous Negative Stiffness and Negative Poisson’s Ratio Properties

Trishan A.M. Hewage; Kim L Alderson; Andrew Alderson; Fabrizio Scarpa

doi:10.1002/adma.201603959

Double-Negative Mechanical Metamaterials Displaying Simultaneous Negative Stiffness and Negative Poisson’s Ratio Properties

Trishan A.M. Hewage, Kim L Alderson, Andrew Alderson, Fabrizio Scarpa

Research output: Contribution to journal › Article (Academic Journal) › peer-review

258 Citations (Scopus)

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Abstract

A scalable mechanical metamaterial simultaneously displaying negative stiffness and negative Poisson's ratio responses is presented. Interlocking hexagonal subunit assemblies containing 3 alternative embedded negative stiffness (NS) element types display Poisson's ratio values of –1 and NS values over two orders of magnitude (–1.4 N mm−1 to –160 N mm−1), in good agreement with model predictions.

Original language	English
Pages (from-to)	10323-10332
Number of pages	10
Journal	Advanced Materials
Volume	28
Issue number	46
Early online date	26 Oct 2016
DOIs	https://doi.org/10.1002/adma.201603959
Publication status	Published - 14 Dec 2016

Keywords

mechanical metamaterial
negative stiffness
negative Poisson’s ratio
auxetic
mechanical properties

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10.1002/adma.201603959

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This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Wiley at http://onlinelibrary.wiley.com/doi/10.1002/adma.201603959/abstract. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 10.5 MBLicence: CC BY-NC

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Professor Fabrizio Scarpa
- F.Scarpabristol.acuk
- School of Civil, Aerospace and Design Engineering - Professor of Smart Materials & Structures
- Cabot Institute for the Environment
- Composites University Technology Centre (UTC)
- Bristol Composites Institute
Person: Academic , Member

Cite this

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title = "Double-Negative Mechanical Metamaterials Displaying Simultaneous Negative Stiffness and Negative Poisson{\textquoteright}s Ratio Properties",

abstract = "A scalable mechanical metamaterial simultaneously displaying negative stiffness and negative Poisson's ratio responses is presented. Interlocking hexagonal subunit assemblies containing 3 alternative embedded negative stiffness (NS) element types display Poisson's ratio values of –1 and NS values over two orders of magnitude (–1.4 N mm−1 to –160 N mm−1), in good agreement with model predictions.",

keywords = "mechanical metamaterial, negative stiffness, negative Poisson{\textquoteright}s ratio, auxetic, mechanical properties",

author = "Hewage, {Trishan A.M.} and Alderson, {Kim L} and Andrew Alderson and Fabrizio Scarpa",

year = "2016",

month = dec,

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doi = "10.1002/adma.201603959",

language = "English",

volume = "28",

pages = "10323--10332",

journal = "Advanced Materials",

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AU - Hewage, Trishan A.M.

AU - Alderson, Kim L

AU - Alderson, Andrew

AU - Scarpa, Fabrizio

PY - 2016/12/14

Y1 - 2016/12/14

N2 - A scalable mechanical metamaterial simultaneously displaying negative stiffness and negative Poisson's ratio responses is presented. Interlocking hexagonal subunit assemblies containing 3 alternative embedded negative stiffness (NS) element types display Poisson's ratio values of –1 and NS values over two orders of magnitude (–1.4 N mm−1 to –160 N mm−1), in good agreement with model predictions.

AB - A scalable mechanical metamaterial simultaneously displaying negative stiffness and negative Poisson's ratio responses is presented. Interlocking hexagonal subunit assemblies containing 3 alternative embedded negative stiffness (NS) element types display Poisson's ratio values of –1 and NS values over two orders of magnitude (–1.4 N mm−1 to –160 N mm−1), in good agreement with model predictions.

KW - mechanical metamaterial

KW - negative stiffness

KW - negative Poisson’s ratio

KW - auxetic

KW - mechanical properties

U2 - 10.1002/adma.201603959

DO - 10.1002/adma.201603959

M3 - Article (Academic Journal)

C2 - 27781310

SN - 0935-9648

VL - 28

SP - 10323

EP - 10332

JO - Advanced Materials

JF - Advanced Materials

IS - 46

ER -

Double-Negative Mechanical Metamaterials Displaying Simultaneous Negative Stiffness and Negative Poisson’s Ratio Properties

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Professor Fabrizio Scarpa

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