Effect of defects on fracture strength of graphene sheets
Effect of defects on fracture strength of graphene sheets
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DOI：
10.1016/j.commatsci.2011.10.032
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发表时间：
2012-03-01
影响因子：
3.3
通讯作者：
Chen, M. W.
中科院分区：
文献类型：
--
作者：
Wang, M. C.;Yan, C.;Chen, M. W.
石墨烯具有碳原子的六边形单层网络，表现出卓越的电学和机械性能。在这项工作中，石墨烯片的Stone-Wales型缺陷和空位的断裂进行了研究，在不同的温度下使用分子动力学模拟。通过键旋转的缺陷的启动也进行了研究。结果表明，缺陷和空位会导致石墨烯的强度显著下降。石墨烯的断裂强度还受温度和加载方向的影响。模拟结果与量子化断裂力学的预测结果进行了比较。(C)2011 Elsevier By. All rights reserved.
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. (C) 2011 Elsevier By. All rights reserved.