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Smart Structures and Systems
  Volume 20, Number 5, November 2017 , pages 583-593
DOI: https://doi.org/10.12989/sss.2017.20.5.583
 


Dynamic buckling response of temperature-dependent functionally graded-carbon nanotubes-reinforced sandwich microplates considering structural damping
Maryam Shokravi and Nader Jalili

 
Abstract
    This research deals with the nonlocal temperature-dependent dynamic buckling analysis of embedded sandwich micro plates reinforced by functionally graded carbon nanotubes (FG-CNTs). The material properties of structure are assumed viscoelastic based on Kelvin–Voigt model. The effective material properties of structure are considered based on mixture rule. The elastic medium is simulated by orthotropic visco-Pasternak medium. The motion equations are derived applying Sinusoidal shear deformation theory (SSDT) in which the size effects are considered using Eringen\'s nonlocal theory. The differential quadrature (DQ) method in conjunction with the Bolotin\'s methods is applied for calculating resonance frequency and dynamic instability region (DIR) of structure. The effects of different parameters such as volume percent of CNTs, distribution type of CNTs, temperature, nonlocal parameter and structural damping on the dynamic instability of visco-system are shown. The results are compared with other published works in the literature. Results indicate that the CNTs have an important role in dynamic stability of structure and FGX distribution type is the better choice.
 
Key Words
    dynamic buckling; FG-CNT; nanocomposite sandwich micro plate; SSDT; viscoelastic
 
Address
Maryam Shokravi: Buein Zahra Technical University, Buein Zahra, Qazvin, Iran
Nader Jalili: Piezoactive Systems Laboratory, Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, USA
 

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