摘要
碳纳米管优异的力学性能使其成为各个微、纳机电器械中不可或缺的元件。为了更好地优化和设计微、纳机电器械,本文详细分析了碳纳米管的屈曲性能和振动特性。首先利用分子动力学软件的大规模原子与分子并行模拟器(large-scale atomic molecular massivety parallel simulator,LAMMPS)对扶手椅型单壁碳纳米管进行了压缩模拟,然后讨论了长径比的变化对单壁碳纳米管弹性模量的影响,在此基础上研究了长径比对临界载荷的影响。最后研究了在不同边界条件下,长径比对碳纳米管轴向振动固有频率的影响。结果表明,长径比的增大使碳纳米管弹性模量和轴向临界载荷变小。此外,长径比的增大降低了碳纳米管轴向振动的固有频率。
Because of its excellent mechanical properties,carbon nanotubes have become indispensable components in various micro-and nano-electromechanical devices.In order to optimize and design micro and nano electromechanical devices,the buckling and vibration characteristics of carbon nanotubes are analyzed in detail in the paper.The armchair single-walled carbon nanotubes are compressed by using molecular dynamics software LAMMPS,and then the influences of the ratio of length to diameter on the elastic modulus of single-walled carbon nanotubes are discussed.Finally,the influence of aspect ratio on the natural frequency of axial vibration of carbon nanotubes under different boundary conditions is studied.The results show that the elastic modulus and axial critical load of carbon nanotubes decrease with the increase of aspect ratio.In addition,the increase of aspect ratio reduces the natural frequency of axial vibration of carbon nanotubes.
作者
马赛
郝淑英
张珂
冯晶晶
MA Sai;HAO Shuying;ZHANG Ke;FENG Jingjing(Tianjin Key Laboratory for Advanced Mechanical System Design and Intelligent Control,Tianjin University of Technology,Tianjin 300384,China;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,Tianjin University of Technology,Tianjin 300384,China)
出处
《天津理工大学学报》
2022年第1期13-17,共5页
Journal of Tianjin University of Technology
基金
国家自然科学基金(12072233,12072234)
天津市自然科学基金(20JCYBJC00510,18JCYBJC19900)。
关键词
碳纳米管
长径比
弹性模量
固有频率
carbon nanotube
aspect ratio
elastic modulus
natural frequency
