Elastic instability of bilayer graphene using atomistic finite element

被引：26

作者：

Chandra, Y. ^{[1
]}

Chowdhury, R. ^{[1
]}

Adhikari, S. ^{[1
]}

Scarpa, F. ^{[2
]}

机构：

[1] Swansea Univ, Multidisciplinary Nanotechnol Ctr, Swansea SA2 8PP, W Glam, Wales

[2] Univ Bristol, Adv Composites Ctr Innovat & Sci, Bristol BS8 1TR, Avon, England

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2011年 / 44卷 / 01期

关键词：

SINGLE-LAYER;

D O I：

10.1016/j.physe.2011.06.020

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In-plane elastic instability of bilayer graphene sheets is investigated using atomistic finite element approaches. The equivalent homogenised properties of graphene sheet are expressed in terms of the thickness, equilibrium lengths and force-field models used to represent the C-C bonds of the graphene lattice. The covalent bonds are represented as structural beams with stretching, bending, torsional and shear deformation, and the strain energies associated to affine deformation mechanisms. The overall mechanical properties and geometric configurations of the nano-structures represented as truss assemblies are then calculated minimising the total potential energy associated to the loading, thickness and average equilibrium lengths of the bonds. Different boundary conditions and aspect ratios are considered for both bilayer and single-layer graphene sheets. The bilayer graphene sheets are found to be offering remarkably higher buckling strengths as compared to single-layer sheets. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：12 / 16

页数：5

共 32 条

[11] Carbon nanotubes, buckyballs, ropes, and a universal graphitic potential [J].