Techno Press


Steel and Composite Structures   Volume 26, Number 3, February10 2018, pages 273-287
DOI: http://dx.doi.org/10.12989/scs.2018.26.3.273
 
Buckling and free vibration analysis of FG-CNTRC-micro sandwich plate
Farzad Kolahdouzan, Ali Ghorbanpour Arani and Mohammad Abdollahian

 
Abstract     [Full Text]
    Buckling and free vibration analysis of sandwich micro plate (SMP) integrated with piezoelectric layers embedded in orthotropic Pasternak are investigated in this paper. The refined Zigzag theory (RZT) is taken into consideration to model the SMP. Four different types of functionally graded (FG) distribution through the thickness of the SMP core layer which is reinforced with single-wall carbon nanotubes (SWCNTs) are considered. The modified couple stress theory (MCST) is employed to capture the effects of small scale effects. The sandwich structure is exposed to a two dimensional magnetic field and also, piezoelectric layers are subjected to external applied voltages. In order to obtain governing equation, energy method as well as Hamilton's principle is applied. Based on an analytical solution the critical buckling loads and natural frequency are obtained. The effects of volume fraction of carbon nanotubes (CNTs), different distributions of CNTs, foundation stiffness parameters, magnetic and electric fields, small scale parameter and the thickness of piezoelectric layers on the both critical buckling loads and natural frequency of the SMP are examined. The obtained results demonstrate that the effects of volume fraction of CNTs play an important role in analyzing buckling and free vibration behavior of the SMP. Furthermore, the effects of magnetic and electric fields are remarkable on the mechanical responses of the system and cannot be neglected.
 
Key Words
    buckling; free vibration; sandwich structure; RZT; MCST; Refined Zigzag Theory
 
Address
(1) Farzad Kolahdouzan, Ali Ghorbanpour Arani, Mohammad Abdollahian:
Faculty of Mechanical Engineering, University of kashan, Kashan, Iran;
(2) Ali Ghorbanpour Arani:
Institute of Nanoscience & Nanotechnology University of Kashan, Kashan, Iran.
 

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