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Effects of MR Fluid on Low-Velocity Impact Response of Laminated Composite Structures

Mortazavi, Mostafa | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 47435 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Zabihollah, Abolghassem
  7. Abstract:
  8. During the past two decades, laminated composite structures have been used for many engineering applications, including aerospace, automotive, sport equipment and pressure vessels.
    In spite of the excellent properties of strength to weight ratio, composite structures are vulnerable to failure when subjected to impact and vibration. It is well known that impact damage may severely degrade the strength and stability of laminated composite structures. For this reason the effect of impact on composites has been a subject of extensive research.
    There are several ways of decreasing the vibration energy of structures, such as diminishing the source energy, designing structures with desired eigen-frequencies and excitation frequencies, using materials that have damping properties, etc. Therewith, there are smart methods for damping the vibration such as using piezoelectric and pizoceramic sensors or MR fluid.
    Three main approaches are used to analyze the impact response of composite structures: experimental testing, numerical simulations, and analytical models. Finite element method is one the best numerical method for solving problems of engineering and mathematical physics.
    The present work aims to investigate the impact response of laminated composite structures filled with MR fluid segments. The mathematical modeling of a composite plate will be presented using finite element method with MATLAB® software to study the vibration response due to impact loads.
    A proof-of-the concept experimental work has been set up in order to illustrate the performance and functionality of the MR fluid on damping vibration for laminated composite structures
  9. Keywords:
  10. Composite Structures ; Laminated Composite Materials ; Magnetorheological (MR)Fluid ; Finite Element Method ; Low Velocity Impact

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