Mechanical characteristics of graphene sheets containing high-density ensembles of 5-8-5 defects

A.S. Kochnev, I.A. Ovid'ko, B.N. Semenov

Результат исследований: Научные публикации в периодических изданияхстатья

4 Цитирования (Scopus)

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© 2014, Institute of Problems of Mechanical Engineering. Classical molecular dynamics is exploited to examine mechanical characteristics (ultimate tensile strength, and tensile strain-to-failure) of graphene sheets containing high-density ensembles of 5-8-5 defects. Each such a defect represents a divacancy associated with "pentagon-octagon-pentagon" atomic configuration in hexagonal crystal lattice of graphene. We revealed that the ultimate tensile strength of graphene sheets significantly degrades (by tens of percent) due to the presence of 5-8-5 defects in graphene, as compared to the tensile strength of ideal (defect-free) graphene. Also, results of our computer model indicate that both the ultimate tensile strength and the tensile strain-to-failure of graphene sheets containing high-density ensembles of 5-8-5 defects are sensitive to temperature. In particular, when temperature increases, the ultimate strength decreases in the almost linear way, and the tensile strain-to-failure decreases in the way simi
Язык оригиналарусский
Страницы (с-по)275-282
ЖурналMaterials Physics and Mechanics
Номер выпуска3
СостояниеОпубликовано - 2014

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Mechanical characteristics of graphene sheets containing high-density ensembles of 5-8-5 defects. / Kochnev, A.S.; Ovid'ko, I.A.; Semenov, B.N.

В: Materials Physics and Mechanics, № 3, 2014, стр. 275-282.

Результат исследований: Научные публикации в периодических изданияхстатья

TY - JOUR

T1 - Mechanical characteristics of graphene sheets containing high-density ensembles of 5-8-5 defects

AU - Kochnev, A.S.

AU - Ovid'ko, I.A.

AU - Semenov, B.N.

PY - 2014

Y1 - 2014

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AB - © 2014, Institute of Problems of Mechanical Engineering. Classical molecular dynamics is exploited to examine mechanical characteristics (ultimate tensile strength, and tensile strain-to-failure) of graphene sheets containing high-density ensembles of 5-8-5 defects. Each such a defect represents a divacancy associated with "pentagon-octagon-pentagon" atomic configuration in hexagonal crystal lattice of graphene. We revealed that the ultimate tensile strength of graphene sheets significantly degrades (by tens of percent) due to the presence of 5-8-5 defects in graphene, as compared to the tensile strength of ideal (defect-free) graphene. Also, results of our computer model indicate that both the ultimate tensile strength and the tensile strain-to-failure of graphene sheets containing high-density ensembles of 5-8-5 defects are sensitive to temperature. In particular, when temperature increases, the ultimate strength decreases in the almost linear way, and the tensile strain-to-failure decreases in the way simi

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JO - ФИЗИКА И МЕХАНИКА МАТЕРИАЛОВ

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