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Surface effects on static bending of nanowires based on non-local elasticity theory

By Quan Wu, Alex A. Volinsky, Lijie Qiao and Yanjing Su


The surface elasticity and non-local elasticity effects on the elastic behavior of statically bent nanowires are investigated in the present investigation. Explicit solutions are presented to evaluate the surface stress and non-local elasticity effects with various boundary conditions. Compared with the classical Euler beam, a nanowire with surface stress and/or non-local elasticity can be either stiffer or less stiff, depending on the boundary conditions. The concept of surface non-local elasticity was proposed and its physical interpretation discussed to explain the combined effect of surface elasticity and non-local elasticity. The effect of the nanowire size on its elastic bending behavior was investigated. The results obtained herein are helpful to characterize mechanical properties of nanowires and aid nanowire-based devices design

Topics: Surface effect, Non-local elasticity, Nanowires, Size effect, Euler–Bernoulli beam, Materials of engineering and construction. Mechanics of materials, TA401-492
Publisher: Elsevier
Year: 2015
DOI identifier: 10.1016/j.pnsc.2015.09.012
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