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On the mechanical characteristics of graphene nanosheets: A fully nonlinear modified Morse model
, Article Nanotechnology ; Volume 31, Issue 11 , 2020 ; Ahmadian, M ; Firoozbakhsh, K ; Sharif University of Technology
Institute of Physics Publishing
2020
Abstract
In this paper, the mechanical properties of graphene nanosheets are evaluated based on the nonlinear modified Morse model. The interatomic interactions including stretching and bending of the covalent bonds between carbon atoms, are replaced by nonlinear extensional and torsional spring-like elements. The finite element method is implemented to analyze the model under different loading conditions and linear characteristics of the graphene structure including the Young's modulus, surface modulus, shear modulus and Poisson's ratio are evaluated for various geometries and chirality where these properties are shown to be size and aspect ratio dependent. It is also found that when the dimensions...