Samaei Arash Tourki, Bakhtiari Majid, Wang Gang-Feng
Young Researchers Club, Chalous Branch, Islamic Azad University, Chalous, 46619/61367, Iran.
Nanoscale Res Lett. 2012 Mar 27;7(1):201. doi: 10.1186/1556-276X-7-201.
This paper investigates the buckling behavior of piezoelectric nanowires under distributed transverse loading, within the framework of the Timoshenko beam theory, and in the presence of surface effects. Analytical relations are given for the critical force of axial buckling of nanowires by accounting for the effects of surface elasticity, residual surface tension, and transverse shear deformation. Through an example, it is shown that the critical electric potential of buckling depends on both the surface stresses and piezoelectricity. This study may be helpful in the characterization of the mechanical properties of nanowires and in the calibration of the nanowire-based force sensors.
本文在铁木辛柯梁理论框架内，考虑表面效应，研究了分布式横向载荷作用下压电纳米线的屈曲行为。通过考虑表面弹性、残余表面张力和横向剪切变形的影响，给出了纳米线轴向屈曲临界力的解析关系。通过一个例子表明，屈曲的临界电势取决于表面应力和压电性。本研究可能有助于纳米线力学性能的表征以及基于纳米线的力传感器的校准。
