Effects of high-order surface stress on buckling and resonance behavior of nanowires

Min Sen Chiu, Tungyang Chen

研究成果: Article

18 引文 斯高帕斯(Scopus)

摘要

A theoretical framework, accounting for high-order surface stress, is implemented in a continuum mechanics model based on the Euler-Bernoulli theory of beams and columns to simulate the buckling and resonance behavior of nanowires (NWs). Closed-form expressions for the critical buckling load of uniaxial compression ofNWsare derived for different types of end conditions. Size-dependent overallYoung'smodulus is characterized versus the diameter of the NWs and is compared with the experimental data. The resonance frequency of NWs is also studied and compared with the simulation results based on nonlinear, finite deformation kinematics. We demonstrate that the present prediction considering both surface moment and surface stress agrees well with the experimental data, while the pure surface stress model may not be able to capture the general trend when the NW's diameter is less than a certain size. We conclude that the present continuum mechanics approach, considering both high-order surface effects, could be served as one of the feasible tools to analyze the mechanical behavior of nanostructures.

原文English
頁(從 - 到)1473-1484
頁數12
期刊Acta Mechanica
223
發行號7
DOIs
出版狀態Published - 2012 七月 1

    指紋

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanical Engineering

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