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 journalArticle (Academic Journal)

86 Citations (Scopus)
258 Downloads (Pure)

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 languageEnglish
Pages (from-to)10323-10332
Number of pages10
JournalAdvanced Materials
Volume28
Issue number46
Early online date26 Oct 2016
DOIs
Publication statusPublished - 14 Dec 2016

Keywords

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

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