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Structural Engineering and Mechanics
  Volume 87, Number 2, July25 2023 , pages 129-136
DOI: https://doi.org/10.12989/sem.2023.87.2.129
 


Dynamic instability region analysis of reinforced-CNTs truncated conical shells using mixed DQ-Bolotin method
H. Vossough, F. Ahmadi and S. Golabi

 
Abstract
    In this paper, dynamic buckling of truncated conical shell made of carbon nanotubes (CNTs) composite is studied. In aerospace industries, this category of structures is utilized extensively due to wide range of engineering applications. To calculate the effective material properties of the nanocomposite, The Mori-Tanaka model is applied. Also, the motion equations are derived with the assistance of the first order shear deformation theory (FSDT), Hamilton's principle and energy method. Besides, In order to solve motion equations and analyze dynamic instability region (DIR) of the structure, mixed model of differential quadrature method (DQM) and Bolotin's method is used. Moreover, investigation of the different parameters effects such as geometrical parameters and volume fraction of CNTs on the analysis of the DIR of the structure is done. In accordance with the obtained results, the DIR will occur at higher frequencies by increasing the volume fraction of CNTs.
 
Key Words
    bolotin; DQM; dynamic buckling; nanocomposite; truncated conical shell
 
Address
H. Vossough, F. Ahmadi and S. Golabi: Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran
 

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