A molecular structural mechanics approach is used to study the effect of double-atom vacancy defects (DAVD) on the elastic properties of zigzag and armchair single-layered graphene sheets (SLGS). To this end, the space frame structure is also adopted to model the interatomic forces of the C–C bonds. The numerical simulation results obtained via the finite element method strongly suggest that double-atom vacancy defects reduce the elastic module of SLGS, which effect weakens with graphene size. Finally, the elastic modulus and Poisson’s ratio of SLGS are found to decrease with the number of DAVDs.
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Acknowledgments
This work was supported by the National Natural Science foundation of China (Nos. 11602066, 11472086, and 11532013) and the China Postdoctoral Science Foundation on the 56th bath of surface founds the project (2014M561327) and the National Science Foundation of Heilongjiang Province of China (QC2015058 and 42400621-1-15047), the Foundation Research Funds for the Central Universities.
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Translated from Problemy Prochnosti, No. 6, pp. 157 – 164, November – December, 2017.
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Wang, Z.Q., Yu, Z.W., Sun, X.Y. et al. Effect of Double-Atom Vacancy Defects on the Elastic Properties of Single-Layered Graphene Sheets. Strength Mater 49, 865–871 (2017). https://doi.org/10.1007/s11223-018-9932-6
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DOI: https://doi.org/10.1007/s11223-018-9932-6