Graphene heals thy cracks

Sanghamitra Debroy

doi:10.1016/j.commatsci.2015.05.025

2015-11-01

PRE

Sanghamitra Debroy

Venkata Pavan Kumar Miriyala

K. Vijaya Sekhar

Swati Ghosh Acharyya *

Amit Acharyya

DOI：10.1016/j.commatsci.2015.05.025

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摘要

En 中文

Molecular Dynamics simulations revealed the phenomena of self healing of cracks which were generated in graphene on application of tensile load exceeding its ultimate tensile strength. The phenomenon of self healing was observed when the system was studied at a very slow rate of 0.05 ps. Cracks initiated in the graphene sheet was allowed to propagate till it reached a critical length following which the load was removed and the sheet was relaxed. The study revealed that self healing of cracks took place within a critical crack opening displacement range of 0.3-0.5 nm in absence of any external stimulus. However, the self healing phenomenon was found to be independent of crack length. This self healing phenomenon occurred not only in pristine graphene sheet, but also in presence of pre-existing vacancies. The mechanism of self healing has been explained by detailed bond length/angle distribution analysis. (C) 2015 Published by Elsevier B.V.

Keyword:

Single layer graphene sheet

Molecular Dynamics simulation

Crack propagation

Self heal

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期刊

Computational Materials Science

IF:

3.3

论文数:

1.4W

被引数:

3.6W

机构

indian institute of technology system (iit system)

学者数:

9.5W

论文数: 9.9W

被引数: 93

indian institute of technology (iit) - hyderabad

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