CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Finite temperature effect on mechanical properties of graphene sheets with various grain boundaries |
Yong Ge(葛勇), Hong-Xiang Sun(孙宏祥), Yi-Jun Guan(管义钧), Gan-He Zeng(曾赣鹤) |
Faculty of Science, Jiangsu University, Zhenjiang 212013, China |
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Abstract The mechanical properties of graphene sheets with various grain boundaries are studied by molecular dynamics method at finite temperatures. The finite temperature reduces the ultimate strengths of the graphenes with different types of grain boundaries. More interestingly, at high temperatures, the ultimate strengths of the graphene with the zigzag-orientation grain boundaries at low tilt angles exhibit different behaviors from those at lower temperatures, which is determined by inner initial stress in grain boundaries. The results indicate that the finite temperature, especially the high one, has a significant effect on the ultimate strength of graphene with grain boundaries, which gives a more in-depth understanding of their mechanical properties and could be useful for potential graphene applications.
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Received: 10 December 2015
Revised: 25 February 2016
Accepted manuscript online:
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PACS:
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61.48.Gh
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(Structure of graphene)
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61.72.Mm
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(Grain and twin boundaries)
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62.20.mt
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(Cracks)
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31.15.xv
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(Molecular dynamics and other numerical methods)
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Fund: Project supported by the Nation Natural Science Foundation of China (Grant Nos. 11347219 and 11404147), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20140519), the Training Project of Young Backbone Teacher of Jiangsu University, the Advanced Talents of Jiangsu University, China (Grant No. 11JDG118), the Practice Innovation Training Program Projects for Industrial Center of Jiangsu University, China, and the State Key Laboratory of Acoustics, Chinese Academy of Sciences (Grant No. SKLOA201308). |
Corresponding Authors:
Yong Ge
E-mail: geyong@mail.ujs.edu.cn
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Cite this article:
Yong Ge(葛勇), Hong-Xiang Sun(孙宏祥), Yi-Jun Guan(管义钧), Gan-He Zeng(曾赣鹤) Finite temperature effect on mechanical properties of graphene sheets with various grain boundaries 2016 Chin. Phys. B 25 066104
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