Steel and Composite Structures

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Vibration analysis of sandwich beam with nanocomposite facesheets considering structural damping effects

  • Cheraghbak, Ali (Faculty of Engineering, Shahrekourd University) ;
  • Dehkordi, M. Botshekanan (Faculty of Engineering, Shahrekourd University) ;
  • Golestanian, H. (Faculty of Engineering, Shahrekourd University)
  • Received : 2019.05.05
  • Accepted : 2019.08.27
  • Published : 2019.09.25
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Abstract

In this paper, free vibration of sandwich beam with flexible core resting on orthotropic Pasternak is investigated. The top and bottom layers are reinforced by carbon nanotubes (CNTs). This sandwich structural is modeled by Euler and Frostig theories. The effect of agglomeration using Mori-Tanaka model is considered. The Eringen's theory is applied for size effect. The structural damping is investigated by Kelvin-voigt model. The motion equations are calculated by Hamilton's principle and energy method. Using analytical method, the frequency of the structure is obtained. The effect of agglomeration and CNTs volume percent for different parameter such as damping of structure, thickens and spring constant of elastic medium are presented on the frequency of the composite structure. Results show that with increasing CNTs agglomeration, frequency is decreased.

Keywords

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