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An Analytical and Experimental Investigation of the Vibration Characteristics of a Sandwich Cylindrical Shell with Electrorheological Fluid

Shah Ali, Pooriya | 2023

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 56875 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Haddadpour, Hassan; Shakhesi, Saeed; Mohammad Navazi, Hossein
  7. Abstract:
  8. In this thesis, we investigate the theoretical and experimental vibrations of a cylindrical shell with an electrorheological core. Magnetorheological and electrorheological fluids are the most suitable materials used in smart structures and have various applications in the automotive, aerospace, civil engineering, medical engineering and robotics industries. We use starch particles and silicone oil to make electrorheological fluid. Then we make a sandwich beam with an ER core and extract the modal parameters of the structure using the modal test. Using the ASTM standard, we estimate the shear modulus of the fabricated ER fluid. In the following, based on the equations developed for the sandwich beam with ER core, we will verify the results with experimental testing. Then we investigate the effects of different geometrical parameters and electric field on the natural frequencies and loss coefficients of the sandwich beam in different boundary conditions. The modal test of three-layer shell with ER core is another part of this research, which aims to validate the equations developed for this type of structure. In the following, we investigate the theory of cylindrical shell vibrations with FGM elastic plates and an electrorheological core, and we investigate the effects of various parameters, including the power law coefficient and electric field intensity, on the modal parameters of the structure
  9. Keywords:
  10. Sandwich Structure ; Cylindrical Shells ; Electrorheological Material ; Modal Test ; Vibration Characteristic ; Magnetorheological (MR)Fluid

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