Zhang Ye-Wei, Yang Tian-Zhi, Zang Jian, Fang Bo
Department of Astronautics, Shenyang Aerospace University, Shenyang 110136, China.
School of Astronautics, Harbin Institute of Technology, Harbin 100124, China.
Materials (Basel). 2013 Jun 10;6(6):2393-2399. doi: 10.3390/ma6062393.
In nanoscale structure sizes, the surface-to-bulk energy ratio is high and the surface effects must be taken into account. Surface effect plays a key role in accurately predicting the vibration behavior of nanostructures. In this paper, the wave behaviors of a single-walled carbon nanotube (CNT) conveying fluid are studied. The nonlocal Timoshenko beam theory is used and the surface effect is taken into account. It is found that the fluid can flow at a very high flow velocity and the wave propagates in the terahertz frequency range. The surface effects can significantly enhance the propagating frequency. This finding is different from the classical model where the surface effect is neglected.
在纳米尺度结构尺寸下，表面与体能量比很高，必须考虑表面效应。表面效应在准确预测纳米结构的振动行为中起着关键作用。本文研究了输送流体的单壁碳纳米管（CNT）的波动行为。采用非局部铁木辛柯梁理论并考虑了表面效应。发现流体能够以非常高的流速流动，且波在太赫兹频率范围内传播。表面效应可显著提高传播频率。这一发现与忽略表面效应的经典模型不同。
