摘要
基于非局部-梯度弹性理论,本文研究了碳纳米管中弯曲波的传播特性。利用理论方法与数值方法获得了在自由空间以及嵌入在弹性介质中的单壁碳纳米管中波的色散关系,研究了在不同的波数下尺度因子与弹性介质对单壁碳纳米管中波的色散关系的影响。数值结果表明弯曲波的波速在低波数下受弹性介质影响较大,在高波数下受尺度效应影响较大。
Based on the nonlocal-gradient elasticity theory,this paper studies wave propagation in nanotubes.Using the theory way and numerical way,the effects of small scale and the surrounding elastic medium on the dispersion characteristics of the transverse wave for diffirent wave numbers in single-walled nanotubes embedded in free medium and in surrounding elastic medium are given.The numerical results show that the dispersion characteristics of wave are affected by the surrounding elastic medium obviously for smaller wave numbers,and affected by the small size for larger wave numbers obviously.
出处
《中国西部科技》
2010年第4期36-37,47,共3页
Science and Technology of West China
关键词
非局部弹性理论
尺度效应
碳纳米管
弯曲波
Nonlocal elasticity theory
Scale effect
Carbon nanotubes
Bending wave
