Negative Poisson's Ratio Behavior Induced by an Elastic Instability

Katia Bertoldi, Pedro M. Reis, Stephen Willshaw, Tom Mullin

    Research output: Contribution to journalArticleAcademic

    511 Citations (Scopus)


    Negative Poisson's ratio behavior has been uncovered in cellular solids that comprise a solid matrix with a square array of circular voids. The simplicity of the fabrication implies robust behavior, which is relevant over a range of scales. The behavior results from an elastic instability, which induces a pattern transformation and excellent quantitative agreement is found between calculation and experiment.
    Original languageUndefined
    Pages (from-to)361-366
    JournalAdvanced materials
    Issue number3
    Publication statusPublished - 2009


    • poisson's ratio
    • matrices
    • elastic instability
    • Arrays
    • IR-72584
    • auxetic materials

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