Scaled boundary finite element simulation and modeling of the mechanical behavior of cracked nanographene sheets

In this paper, by using scaled boundary finite element method (SBFM), a perfect nano-graphene sheet or cracked ones were simulated for the first time. In this analysis, the atomic carbon bonds were modeled by simple bar elements with circular cross-sections. Despite of molecular dynamics (MD), the results obtained from SBFM analysis are quite acceptable for zero degree cracks. For all angles except zero, Griffith criterion can be applied for the relation between critical stress and crack length. Finally, despite the simplifications used in nanographene analysis, obtained results can simulate the mechanical behavior with high accuracy compared with experimental and MD ones. (C) 2018 Elsevier Ltd. All rights reserved.