期刊
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
卷 120, 期 -, 页码 82-99出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijengsci.2017.06.008
关键词
Nanoporous nanoplate; Hygro-thermal environment; Nonlocal strain gradient theory; Four-variable plate theory
In this paper, a general nonlocal strain-gradient (NSG) elasticity model is developed for vibration analysis of porous nano-scale plates on an elastic substrate. The present model incorporates two scale coefficients to examine the vibration characteristics much accurately. The application of present nanoplate model as nano-mechanical mass sensors is also investigated. Porosity-dependent material properties of the nanoplate are defined via a modified power-law function and Mod-Tanaka model. Based on Hamilton's principle, the governing equations of the nanoplate on the elastic substrate under hygro-thermal loading are obtained. These equations are solved for hinged nanoplates via Galerkin's method. It is demonstrated that nano-pores, temperature change, humidity change, nonlocal-strain gradient parameters, gradient index and attached nanoparticle have a remarkable influence on vibration frequencies of nanoscale plates. (C) 2017 Elsevier Ltd. All rights reserved.
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