A continuum hyperelastic model for auxetic materials

Jacopo Ciambella, Giuseppe Saccomandi

Research output: Contribution to journalArticle (Academic Journal)peer-review

15 Citations (Scopus)


We propose a simple mathematical model to describe isotropic auxetic materials in the framework of the classical theory of nonlinear elasticity. The model is derived from the Blatz-Ko constitutive equation for compressible foams and makes use of a non-monotonic Poisson function. An application to the modelling of auxetic foams is considered and it is shown that the material behaviour is adequately described with only three constitutive parameters.


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