Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Effective elastic properties of auxetic microstructures : anisotropy and structural applications

Abstract : Materials presenting a negative Poisson's ratio (auxetics) have drawn attention for the past two decades, especially in the field of lightweight composite structures and cellular media. Studies have shown that auxeticity may result in higher shear modulus, indentation toughness and acoustic damping. In this work, three auxetic periodic microstructures based on 2D geometries are considered for being used as sandwich-core materials. Elastic moduli are computed for each microstructure by using finite elements combined with periodic homogenization technique. Anisotropy of elastic properties is investigated in and out-of-plane. Comparison is made between auxetics and the classical honeycomb cell. A new 3D auxetic lattice is proposed for volumic applications. Cylindrical and spherical elastic indentation tests are simulated in order to conclude on the applicability of such materials to structures. Proof is made that under certain conditions, auxetics can be competitive with honeycomb cells in terms of indentation strength. Their relatively soft response in tension can be compensated, in some situations, by high shear moduli.
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [29 références]  Voir  Masquer  Télécharger
Contributeur : Bibliothèque Umr7633 <>
Soumis le : lundi 23 décembre 2019 - 15:28:05
Dernière modification le : jeudi 24 septembre 2020 - 18:30:07
Archivage à long terme le : : mardi 24 mars 2020 - 13:40:07


Fichiers éditeurs autorisés sur une archive ouverte



Justin Dirrenberger, Samuel Forest, Dominique Jeulin. Effective elastic properties of auxetic microstructures : anisotropy and structural applications. International Journal of Mechanics and Materials in Design, Springer Verlag, 2013, 9 (1), pp.21-33. ⟨10.1007/s10999-012-9192-8⟩. ⟨hal-00790180⟩



Consultations de la notice


Téléchargements de fichiers