Effect of defects on fracture strength of graphene sheets

M. C. Wang; C. Yan; L. Ma; N. Hu; M. W. Chen

doi:10.1016/j.commatsci.2011.10.032

Effect of defects on fracture strength of graphene sheets

M. C. Wang, C. Yan, L. Ma, N. Hu, M. W. Chen

Research output: Contribution to journal › Article › peer-review

203 Citations (Scopus)

Abstract

With a hexagonal monolayer network of carbon atoms, graphene has demonstrated exceptional electrical 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.

Original language	English
Pages (from-to)	236-239
Number of pages	4
Journal	Computational Materials Science
Volume	54
Issue number	1
DOIs	https://doi.org/10.1016/j.commatsci.2011.10.032
Publication status	Published - 2012 Mar

Keywords

Defect
Fracture strength
Graphene
Molecular dynamics simulation

ASJC Scopus subject areas

Computer Science(all)
Chemistry(all)
Materials Science(all)
Mechanics of Materials
Physics and Astronomy(all)
Computational Mathematics

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10.1016/j.commatsci.2011.10.032

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AU - Ma, L.

AU - Hu, N.

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AB - With a hexagonal monolayer network of carbon atoms, graphene has demonstrated exceptional electrical 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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KW - Fracture strength

KW - Graphene

KW - Molecular dynamics simulation

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Effect of defects on fracture strength of graphene sheets

Abstract

Keywords

ASJC Scopus subject areas

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