Prediction of auxetic phenomena in nanoporomaterials

Abstract

Porous materials are efficient structures in respect to optimizing strength and stiffness for a given weight. A new means of improving the characteristics of the samples may be realized using abnormal deformation properties of auxetic porous materials having a negative Poisson's ratio ν. Auxetic porous materials are suitable for creating adaptive contact joints and for replacing damaged biotissue. It is known that the inverted or re‐entrant cell structure of porous auxetics may be obtained by isotropic permanent volumetric compression of conventional foam, resulting in microbuckling of the cell walls. There is interest in compression‐driven self‐assembly as a means to create auxetic porous structures on a nanoscale. To predict the deformation behaviour of porous materials under various types of loading, corresponding mathematical models should be developed. The possibility of compression‐driven self‐assembly of the auxetic nanostructures has been predicted. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Auxetic materials and their potential applications in textiles

“…The prediction model showed that the nanoporomaterials have good strength and deformation performance. 45 Auxetic polymeric materials cooperated with other properties will give a big leap in application.…”

Predictions of Young's modulus and negative Poisson's ratio of auxetic foams

“…Recently, more studies have been developed. The uniaxial compressive properties [17], dynamic properties [18,19], tension fatigue [20] and shape memory behaviours [21,22] of auxetic foams were studied by Scarpa et al The auxetic phenomena were predicted by Shilko et al [23] through investigating the deformation behaviours of porous materials under various types of loading. The mass-transport property was another potential application of auxetic foams [15], and Wojciechowski and co-workers [24] simulated fluid flow in a channel by finiteelement analysis (FEA).…”