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AuthorMousanezhad, Davood
AuthorBabaee, Sahab
AuthorEbrahimi, Hamid
AuthorGhosh, Ranajay
AuthorHamouda, Abdelmagid Salem
AuthorBertoldi, Katia
AuthorVaziri, Ashkan
Available date2016-11-03T09:26:26Z
Publication Date2015-12-16
Publication NameScientific Reportsen_US
Identifierhttp://dx.doi.org/10.1038/srep18306
CitationMousanezhad, D. et al. Hierarchical honeycomb auxetic metamaterials. Sci. Rep. 5, 18306
URIhttp://hdl.handle.net/10576/4957
AbstractMost conventional materials expand in transverse directions when they are compressed uniaxially resulting in the familiar positive Poisson’s ratio. Here we develop a new class of two dimensional (2D) metamaterials with negative Poisson’s ratio that contract in transverse directions under uniaxial compressive loads leading to auxeticity. This is achieved through mechanical instabilities (i.e., buckling) introduced by structural hierarchy and retained over a wide range of applied compression. This unusual behavior is demonstrated experimentally and analyzed computationally. The work provides new insights into the role of structural organization and hierarchy in designing 2D auxetic metamaterials, and new opportunities for developing energy absorbing materials, tunable membrane filters, and acoustic dampeners.
SponsorNPRP award [NPRP 7-882-2-326] from the Qatar National Research Fund (a member of the Qatar Foundation).
Languageen
PublisherNature Publishing Group
SubjectMechanical engineering
SubjectSoft materials
SubjectMechanical properties
TitleHierarchical honeycomb auxetic metamaterials
TypeArticle
Volume Number5
ESSN2045-2322


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