THE PUBLISHING HOUSE PROCEEDINGS OF THE ROMANIAN ACADEMY, Series A, OF THE ROMANIAN ACADEMY Volume 9, Number 1/2008, pp. 000–000 ON THE CHARACTERIZATION OF AUXETIC COMPOSITES

The effective Young’s modulus of an auxetic composite is the aim of this paper. The composite is made up of alternating layers of auxetic material (with a negative Poisson’s ratio) and aluminum. The problem is solved in the light of Cosserat elasticity which admits degrees of freedom not present in classical elasticity, i.e. rotation of points in the material and couple stresses. The enhancement in the Young’s modulus for auxetic over nonauxetic materials is reported. Key words: Auxetic material, Negative Poisson’ratio, Bécus homogenization method. 1