文章基本信息

标题：Electro-thermo--mechanical nonlinear buckling of Pasternak coupled DWBNNTs based on nonlocal piezoelasticity theory
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作者：Ali GHORBANPOUR ARANI ; Seyed Abolfazl JAMALI ; Saeed AMIR 等
期刊名称：Turkish Journal of Engineering and Environmental Sciences
印刷版ISSN：1300-0160
电子版ISSN：1303-6157
出版年度：2013
卷号：37
页码：231-246
DOI：10.3906/muh-1212-13
出版社：Scientific and Technical Research Council of Turkey
摘要：Nonlinear buckling of bonded double-walled boron nitride nanotubes (DWBNNTs) under combined electrothermo–mechanical loadings based on the nonlocal piezoelasticity theory and Euler–Bernoulli beam (EBB) model is presented in this paper. Coupled DWBNNTs are embedded in an elastic medium that is simulated as a Pasternak foundation. Using the Lennard-Jones model, the van der Waals interaction between 2 layers of DWBNNTs is taken into account. Considering the von K´arm´an geometric nonlinearity, Hamilton’s principle, and charge equation, higher order governing equations are derived and solved by differential quadrature method (DQM). The detailed parametric study is conducted, focusing on the remarkable effects on the behavior of nonlinear buckling loads. The results indicated that the small-scale parameter, elastic medium, boundary conditions, electric potential, aspect ratio, and different vibration phases play an important role in the nonlinear buckling of smart elastically coupled systems. In addition, it is found that the trend of figures has good agreement with those of previous research. The results of this work could be used in the design and manufacture of nano/micro-electro–mechanical systems.
关键词：Nonlinear buckling; coupled system; nonlocal piezoelasticity theory; energy method; DQM