扶手椅型单壁碳纳米管的扭转和弯曲变形

功能材料与器件学报 , 2008, 14(1): 134-138. doi: 10.3969/j.issn.1007-4252.2008.01.030

扶手椅型单壁碳纳米管的扭转和弯曲变形

坎标 ^1, , 丁建宁 ^2, , 程广贵 ^3, , 范真 ^4, , 凌智勇 ^5,

1.江苏大学微纳米科学技术中心,镇江,212013

2.江苏大学微纳米科学技术中心,镇江,212013;江苏工业学院,常州,213016

3.江苏大学微纳米科学技术中心,镇江,212013

4.江苏大学微纳米科学技术中心,镇江,212013

5.江苏大学微纳米科学技术中心,镇江,212013

基金项目: 国家自然科学基金(50475124) 教育部跨世纪优秀人才培养计划(NCET)

关键词：单壁碳纳米管 , 扭转 , 弯曲 , 有限元方法 , 屈曲

Torsional and bended deformation of armchair single- walled carbon nanotube

实验提出了一种针对单壁碳纳米管的原子尺度有限元模型.利用该模型对(5,5)型扶手椅型单壁碳纳米管的扭转和弯曲变形过程进行了模拟,发现其屈曲的临界扭转和纯弯曲角度分别约为40°和20°,与扭转屈曲相比,该碳管更容易发生弯曲屈曲.当弯扭复合变形时发生屈曲后,卸载时壁面褶皱的回复比较缓慢.在某些情况下,碳管的局部势能的变化与经典连续介质力学理论不一致,对此本文结合原子势理论给出了模拟结果的原子尺度的解释.

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材料期刊网

扶手椅型单壁碳纳米管的扭转和弯曲变形

Torsional and bended deformation of armchair single- walled carbon nanotube

参考文献