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