Crack propagation in graphene

P. R. Budarapu; B. Javvaji; V. K. Sutrakar; D. Roy Mahapatra; Goangseup Zi; Timon Rabczuk

doi:10.1063/1.4928316

Crack propagation in graphene

P. R. Budarapu, B. Javvaji, V. K. Sutrakar, D. Roy Mahapatra, Goangseup Zi, Timon Rabczuk

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70 Citations (Scopus)

Abstract

The crack initiation and growth mechanisms in an 2D graphene lattice structure are studied based on molecular dynamics simulations. Crack growth in an initial edge crack model in the arm-chair and the zig-zag lattice configurations of graphene are considered. Influence of the time steps on the post yielding behaviour of graphene is studied. Based on the results, a time step of 0.1 fs is recommended for consistent and accurate simulation of crack propagation. Effect of temperature on the crack propagation in graphene is also studied, considering adiabatic and isothermal conditions. Total energy and stress fields are analyzed. A systematic study of the bond stretching and bond reorientation phenomena is performed, which shows that the crack propagates after significant bond elongation and rotation in graphene. Variation of the crack speed with the change in crack length is estimated.

Original language	English
Article number	064307
Journal	Journal of Applied Physics
Volume	118
Issue number	6
DOIs	https://doi.org/10.1063/1.4928316
Publication status	Published - 2015 Aug 14

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Publisher Copyright:
© 2015 AIP Publishing LLC.

ASJC Scopus subject areas

General Physics and Astronomy

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abstract = "The crack initiation and growth mechanisms in an 2D graphene lattice structure are studied based on molecular dynamics simulations. Crack growth in an initial edge crack model in the arm-chair and the zig-zag lattice configurations of graphene are considered. Influence of the time steps on the post yielding behaviour of graphene is studied. Based on the results, a time step of 0.1 fs is recommended for consistent and accurate simulation of crack propagation. Effect of temperature on the crack propagation in graphene is also studied, considering adiabatic and isothermal conditions. Total energy and stress fields are analyzed. A systematic study of the bond stretching and bond reorientation phenomena is performed, which shows that the crack propagates after significant bond elongation and rotation in graphene. Variation of the crack speed with the change in crack length is estimated.",

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AU - Javvaji, B.

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AU - Zi, Goangseup

AU - Rabczuk, Timon

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Crack propagation in graphene

Abstract

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