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Hierarchical auxetic mechanical metamaterials

Scientific reports, 2015-02, Vol.5 (1), p.8395-8395, Article 8395 [Peer Reviewed Journal]

Copyright Nature Publishing Group Feb 2015 ;Copyright © 2015, Macmillan Publishers Limited. All rights reserved 2015 Macmillan Publishers Limited. All rights reserved ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/srep08395 ;PMID: 25670400

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  • Title:
    Hierarchical auxetic mechanical metamaterials
  • Author: Gatt, Ruben ; Mizzi, Luke ; Azzopardi, Joseph I ; Azzopardi, Keith M ; Attard, Daphne ; Casha, Aaron ; Briffa, Joseph ; Grima, Joseph N
  • Subjects: Chemical composition ; Geometry ; Implants ; Models, Theoretical ; Skin
  • Is Part Of: Scientific reports, 2015-02, Vol.5 (1), p.8395-8395, Article 8395
  • Description: Auxetic mechanical metamaterials are engineered systems that exhibit the unusual macroscopic property of a negative Poisson's ratio due to sub-unit structure rather than chemical composition. Although their unique behaviour makes them superior to conventional materials in many practical applications, they are limited in availability. Here, we propose a new class of hierarchical auxetics based on the rotating rigid units mechanism. These systems retain the enhanced properties from having a negative Poisson's ratio with the added benefits of being a hierarchical system. Using simulations on typical hierarchical multi-level rotating squares, we show that, through design, one can control the extent of auxeticity, degree of aperture and size of the different pores in the system. This makes the system more versatile than similar non-hierarchical ones, making them promising candidates for industrial and biomedical applications, such as stents and skin grafts.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/srep08395
    PMID: 25670400
  • Source: PubMed Central (Open access)
    AUTh Library subscriptions: ProQuest Central
    MEDLINE
    DOAJ Directory of Open Access Journals
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