Effect of defects on fracture strength of graphene sheets

Wang, Mingchao, Yan, Cheng, Ma, Lin, Hu, Ning, & Chen, Mingwei (2012) Effect of defects on fracture strength of graphene sheets. Computational Materials Science, 54, pp. 236-239.

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Abstract

With a hexagonal monolayer network of carbon atoms, graphene has demonstrated exceptional electrical 22 and mechanical properties. In this work, the fracture of graphene sheets with Stone–Wales type defects and vacancies were investigated using molecular dynamics simulations at different temperatures. The initiation of defects via bond rotation was also investigated. The results indicate that the defects and vacancies can cause significant strength loss in graphene. The fracture strength of graphene is also affected by temperature and loading directions. The simulation results were compared with the prediction from the quantized fracture mechanics.

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ID Code: 66150
Item Type: Journal Article
Refereed: Yes
Keywords: Graphene, Defect, Fracture strength, Molecular dynamics simulation
DOI: 10.1016/j.commatsci.2011.10.032
ISSN: 0927-0256
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Numerical Modelling and Mechanical Characterisation (091307)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Mechanical Engineering not elsewhere classified (091399)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2011 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in Computational Materials Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Computational Materials Science, [VOL 54, (2012)] DOI: 10.1016/j.commatsci.2011.10.032
Deposited On: 15 Jan 2014 01:14
Last Modified: 03 Apr 2014 06:25

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