Discrete homogenization in graphene sheet modeling

Abstract : Graphene sheets can be considered as lattices consisting of atoms and of interatomic bonds. Their bond lengths are smaller than one nanometer. Simple models describe their behavior by an energy that takes into account both the interatomic lengths and the angles between bonds. We make use of their periodic structure and we construct an equivalent macroscopic model by means of a discrete homogenization technique. Large three-dimensional deformations of graphene sheets are thus governed by a membrane model whose constitutive law is implicit. By linearizing around a prestressed configuration, we obtain linear membrane models that are valid for small displacements and whose constitutive laws are explicit. When restricting to two-dimensional deformations, we can linearize around a rest configuration and we provide explicit macroscopical mechanical constants expressed in terms of the interatomic tension and bending stiffnesses.
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https://hal.archives-ouvertes.fr/hal-00126908
Contributeur : Annie Raoult <>
Soumis le : vendredi 26 janvier 2007 - 15:17:02
Dernière modification le : mardi 10 octobre 2017 - 11:22:03

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  • HAL Id : hal-00126908, version 1

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Denis Caillerie, Ayman Mourad, Annie Raoult. Discrete homogenization in graphene sheet modeling. Journal of Elasticity, Springer Verlag, 2006, 84, pp.33-68. 〈hal-00126908〉

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