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Dynamic analysis of electrorheological fluid sandwich cylindrical shells with functionally graded face sheets using a semi-analytical approach

Shahali, P ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.compstruct.2022.115715
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. The present research is performed to calculate the natural frequencies, loss factors, and associated mode shapes of a sandwich cylinder with moderately thick functionally graded (FG) face sheets and an electrorheological (ER) fluid core. Each face sheet is assumed to be made of FG materials, and its displacement field is estimated based on the first-order shear deformation theory, like the ER constrained layer. A suitable displacement continuity condition is considered between layers. The ER fluid used in the central middle is analyzed in the pre-yield area and considered electric field dependent. Hamilton's principle is used to acquire the motion equations related to each layer and appropriate boundary conditions. A computational code is implemented based on the combination of trigonometric expansion and the generalized differential quadrature (GDQ) methods to extract the complex eigenvalue problem for the vibration and damping of the assumed structure. After carrying out a comprehensive verification study, some novel numerical results are obtained. In the parametric study, the effects of the applied electric field, the FG power-law index, various boundary conditions, and structure geometry to control the natural frequencies and modal loss factors, as well as mode shapes, are investigated. © 2022 Elsevier Ltd
  6. Keywords:
  7. Cylindrical shell ; ER fluid core ; FGM face sheets ; Semi-analytical method ; Vibration and damping analysis ; Boundary conditions ; Computation theory ; Cylinders (shapes) ; Damping ; Eigenvalues and eigenfunctions ; Electric fields ; Electric losses ; Electrorheological fluids ; Equations of motion ; Nanofluidics ; Natural frequencies ; Plates (structural components) ; Rheology ; Shear deformation ; Vibration analysis ; Damping analysis ; Electrorheological fluid core ; Face sheets ; FGM face sheet ; Frequency loss ; Functionally graded face sheets ; Mode shapes ; Semi-analytical methods ; Vibrations analysis ; Shells (structures)
  8. Source: Composite Structures ; Volume 295 , 2022 ; 02638223 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0263822322004937