Nonlocal piezoelasticity based wave propagation of bonded double-piezoelectric nanobeam-systems

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• 作者：A. Ghorbanpour Arani (1) (2)
  R. Kolahchi (1)
  S. A. Mortazavi (1)
  
• 关键词：Double ; piezoelectric nanobeam ; systems ; Wave propagation ; Pasternak foundation ; Euler–Bernoulli beam ; Exact solution
• 刊名：International Journal of Mechanics and Materials in Design
• 出版年：2014
• 出版时间：June 2014
• 年：2014
• 卷：10
• 期：2
• 页码：179-191
• 全文大小：
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• 作者单位：A. Ghorbanpour Arani (1) (2)
  R. Kolahchi (1)
  S. A. Mortazavi (1)
  
  1. Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran
  2. Institute of Nanoscience & Nanotechnology, University of Kashan, Kashan, Iran
  
• ISSN：1573-8841

文摘

Piezoelectric nanobeam (PNB) offer the possibility of being used in micro-electromechanical systems and nano-electromechanical systems and the dynamic testing of such structures often produces stress wave propagation in them. This work concerns with the size-dependent wave propagation of double-piezoelectric nanobeam-systems (DPNBSs) based on Euler–Bernoulli beam model. The two piezoelectric nanobeams are coupled by an enclosing elastic medium which is simulated by Pasternak foundation. Nonlocal piezoelasticity theory is used to derive the general differential equation based on Hamilton’s principal to include those scale effects. Particular attention is paid to the wave propagation piezoelectric control of the coupled system in three cases namely in-phase wave propagation, out-of-phase wave propagation and wave propagation when one PNB is stationary. In three mentioned cases, an analytical method is proposed to obtain phase velocity; cut-off and escape frequencies of the DPNBSs. Results indicate that the imposed external voltage is an effective controlling parameter for wave propagation of the coupled system. Furthermore, the phase velocity of in-phase wave propagation is independent of elastic medium stiffness.