Volume 92, Number 1, October 2010
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||28 October 2010|
Surface effects on the elasticity of nanosprings
Department of Mechanics, Tianjin University - Tianjin 300072, PRC
2 AML, Department of Engineering Mechanics, Tsinghua University - Beijing 100084, PRC
3 Department of Engineering Mechanics, Xi'an Jiaotong University - Xi'an 710049, PRC
4 School of Engineering, Australian National University - Canberra, ACT 0200, Australia
Accepted: 20 September 2010
Nanosprings made of metallic or semiconducting materials hold promise for a wide range of important applications. In this letter, we extend the classical Kirchhoff rod model by incorporating surface effects on the mechanical response of quasi–one-dimensional nanomaterials. The refined model is then employed to derive the elastic constants of a nanospring by accounting for the effect of surface elasticity and residual surface stresses. The results demonstrate that the stiffness of nanosprings may exhibit remarkable dependence on their cross-sections sizes. This study is helpful not only for understanding the size-dependent behavior of nanosprings but also for their applications in micro/nano-electro-mechanical systems.
PACS: 62.25.-g – Mechanical properties of nanoscale systems / 62.20.D- – Elasticity / 07.07.Df – Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
© EPLA, 2010
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