# Auxetic behavior from rotating triangles

@article{Grima2006AuxeticBF, title={Auxetic behavior from rotating triangles}, author={Joseph N. Grima and Kenneth E. Evans}, journal={Journal of Materials Science}, year={2006}, volume={41}, pages={3193-3196} }

Materials with a negative Poisson’s ratio (auxetic) exhibit the very unusual property of becoming wider when stretched and narrower when compressed [1]. This property gives a material several beneficial effects such as increased shear stiffness, increased plane strain fracture toughness, increased indentation resistance and improved acoustic damping properties [1–5]. In recent years several auxetics have been manufactured by modifying the microstructure of existing materials, including foams [2…

## 195 Citations

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### Mechanical analysis of the auxetic behavior of novel braided tubular structures by the finite element method

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Although a negative Poisson's ratio (that is, a lateral extension in response to stretching) is not forbidden by thermodynamics, for almost all common materials the Poisson's ratio is positive. In…

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This paper illustrates various dynamic characteristics of open cell compliant polyurethane foam with auxetic (negative Poisson's ratio) behaviour. The foam is obtained from off-the-shelf open cell…

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Poisson's ratio is, for specified directions, the ratio of a lateral contraction to the longitudinal extension during the stretching of a material. Although a negative Poisson's ratio (that is, a…

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A microporous, anisotropic form of expanded polytetrafluoroethylene has been found to have a large negative major Poisson's ratio. The value of Poisson's ratio varies with tensile strain and can…

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