Chin. Phys. Lett.  2017, Vol. 34 Issue (9): 096201    DOI: 10.1088/0256-307X/34/9/096201
CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
New Insights on the Deflection and Internal Forces of a Bending Nanobeam
De-Min Zhao, Jian-Lin Liu**
Department of Engineering Mechanics, College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580
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Abstract Nanowires, nanofibers and nanotubes have been widely used as the building blocks in micro/nano-electromechanical systems, energy harvesting or storage devices, and small-scaled measurement equipment. We report that the surface effects of these nanobeams have a great impact on their deflection and internal forces. A simply supported nanobeam is taken as an example. For the displacement and shear force of the nanobeam, its dangerous sections are different from those predicted by the conventional beam theory, but for the bending moment, the dangerous section is the same. Moreover, the values of these three quantities for the nanobeam are all distinct from those calculated from the conventional beam model. These analyses shed new light on the stiffness and strength check of nanobeams, which are beneficial to engineer new-types of nano-materials and nano-devices.
Received: 16 May 2017      Published: 15 August 2017
PACS:  62.23.Hj (Nanowires)  
  62.25.-g (Mechanical properties of nanoscale systems)  
  68.35.Gy (Mechanical properties; surface strains)  
Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11672334, 11672335 and 11611530541, and the Fundamental Research Funds for the Central Universities under Grant No 15CX08004A.
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De-Min Zhao, Jian-Lin Liu 2017 Chin. Phys. Lett. 34 096201
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http://cpl.iphy.ac.cn/10.1088/0256-307X/34/9/096201       OR      http://cpl.iphy.ac.cn/Y2017/V34/I9/096201
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De-Min Zhao
Jian-Lin Liu
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