| 原子空位缺陷对扶手椅形单层碳纳米管轴压屈曲性能的影响 |
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| 引用本文： | 辛浩;韩强;姚小虎.原子空位缺陷对扶手椅形单层碳纳米管轴压屈曲性能的影响[J].华南理工大学学报(自然科学版),2008,36(6). |
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| 作者姓名： | 辛浩;韩强;姚小虎 |
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| 作者单位： | 华南理工大学土木与交通学院,广东广州510640 |
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| 基金项目： | 国家自然科学基金资助项目
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广东省自然科学基金资助项目 |
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| 摘 要： | 采用分子动力学方法,分别对含单、双原子空位缺陷的扶手椅形单层碳纳米管及其完善结构进行轴向压缩的数值模拟,对比两种长度纳米管在不同温度条件下的承载性能.模拟结果表明,温度越低、碳纳米管的长度越长,完善纳米管屈曲强度的温度依赖性越显著.管壁缺陷显著降低了纳米管的承载能力,而且含缺陷碳纳米管的屈曲性能对温度变化并不敏感.
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| 关 键 词： | 分子动力学 碳纳米管 屈曲 温度 缺陷 |
| 收稿时间： | 2007-7-27 |
| 修稿时间： | 2007-10-31 |
Influences of atom vacancies on buckling properties of armchair single-walled carbon nanotubes from molecular dynamics simulations |
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| Jacky Allen.Influences of atom vacancies on buckling properties of armchair single-walled carbon nanotubes from molecular dynamics simulations[J].Journal of South China University of Technology(Natural Science Edition),2008,36(6). |
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| Authors: | Jacky Allen |
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| Abstract: | Molecular dynamics simulations are employed to simulate the axial compression of both perfect and defective armchair single-walled carbon nanotubes (SWCNTs). Three temperature and two length conditions are considered for comparison. It is revealed that the critical buckling load of short SWCNTs is more temperature-dependent, especially at low temperature. The vacancies defects in SWCNTs have remarkable influences on their buckling properties, and the defective SWCNTs do not show the similar temperature-dependent buckling properties as the perfect tube. |
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| Keywords: | molecular dynamics single-walled carbon nanotubes buckling temperature defect |
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