Loading...

Vibration Behavior of Laminated Composite Beam Incorporated with MR (Magnetorheological) Fluid under Random Excitation

Momeni, Saman | 2018

690 Viewed
  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 51289 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Behzad, Mehdi; Zabihollah, Abolghassem
  7. Abstract:
  8. Laminated composite beams are being widely used in engineering applications, including aerospace and automobile where the structures are highly subjected to non-deterministic random loadings, requiring a reliable technique to ensure the stability of structure during operation. A Novel N-layer model of layerwise theory (LWT) for laminated composite beams incorporated with magnetorheological fluid (MR-laminated beams) is developed. In addition, a finite element model of tapered laminated composite beams incorporated with magnetorheological fluid (MR-tapered beam) based on layerwise theory is developed. The dynamic response of the present model for uniform and tapered beams have been compared with First order Shear Deformation Theory (FSDT). It is observed that the present N-layer model of MR-laminated beams results in higher stiffness and natural frequencies compared to the other available models. Moreover, to mitigate the effects of random loadings on the structural stability of the structure, segments of magnetorheological (MR) fluids have been embedded in the MR-laminated beam. In this work, the effects of size, and location of MR-fluids segments on random vibration characteristics by applying magnetic fields up to 2100 Gauss are investigated. Finite element models based on LWT are used to study the numerical examples. An in-house experimental setup is designed and assembled to verify the simulation results. The simulation results are compared and in good agreement with the FSDT and verified by several experimental tests
  9. Keywords:
  10. Laminated Composite Beam ; Random Vibration ; Dynamic Behavior ; Magnetorheological (MR)Fluid ; Laminated Composite Beam

 Digital Object List

 Bookmark

No TOC