Scaled boundary finite element simulation and modeling of the mechanical behavior of cracked nanographene sheets. (June 2018)

• Record Type: Journal Article
• Authors: Honarmand, M.; Moradi, M.
• Is Part Of: Superlattices and microstructures. Volume 118(2018)
• Page Start: 242
• Page End: 255
• Publication Date: 2018-06
• Subjects: Scaled boundary finite element -- Nano graphene sheets -- Crack -- Mechanical behavior -- Fracture mechanics; Superlattices as materials -- Periodicals; Microstructure -- Periodicals; Semiconductors -- Periodicals; Superréseaux -- Périodiques; Microstructure (Physique) -- Périodiques; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.spmi.2018.04.029
• Languages: English
• ISSNs: 0749-6036

Abstract

Abstract: In this paper, by using scaled boundary finite element method (SBFM), a perfect nanographene 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. Graphical abstract: Highlights: By using scaled boundary finite element method (SBFM), mechanical behavior of nanographene was investigated. The results from SBFM simulation were in very good agreement with experimental results as well as molecular dynamics (MD). Unlike MD analysis for which a 0° crack shows unexpected results, in SBFM analysis the results are quite acceptable. For all crack angles except zero, Griffith criterion can be applied for the relation between critical stress and crack length. The results of SBFM are in good agreement with the linear fracture mechanics.