Hyperelastic Tension of Graphene
EI Saavedra Flores (Universidad de Santiago de Chile, Chile), RM Ajaj (University of Southampton), S Adhikari, I Dayyani, MI Friswell (Swansea University) & R Castro-Triguero (University of Cordoba, Spain)
Applied Physics Letters, Vol. 106, No. 6, February 2015, paper 061901
In this paper we investigate the hyperelastic tensile behaviour of single layer graphene sheets (SLGSs). A one-term incompressible Ogden-type hyperelastic model is chosen to describe the mechanical response of C-C bonds. By establishing equality between the Ogden strain-energy and the variation of the Tersoff-Brenner interatomic potential, three different geometries of SLGSs are studied under tensile loading. We compute the Young's modulus, the finite-deformation Poisson's ratio, ultimate strains, total reactions and the variation of the potential energy per carbon atom for large strains. Numerical simulations are compared with results obtained by molecular mechanics and molecular dynamics simulations, finite elements, continuum mechanics theory and experiments. Our predictions are validated, revealing the potential predictive capabilities of the present hyperelastic framework for the analysis of graphene in the context of infinitesimal and large deformations. The good agreement found between our calculations and the published data suggests that graphene may be described as a hyperelastic material.
This material has been published in the Applied Physics Letters, Vol. 106, No. 6, February 2015, paper 061901, the only definitive repository of the content that has been certified and accepted after peer review. Copyright and all rights therein are retained by the American Institute of Physics.
Link to paper using doi: 10.1063/1.4908119
Link to paper on the AIP website
Applied Physics Letters