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Property Identification of Viscoelastic Coatings Through Non-contact Experimental Modal Analysis

Baver, Brett C

Abstract Details

2016, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
Viscoelastic coatings are currently being used in a variety of industries to provide shock absorption, energy absorption, noise reduction, and vibration isolation. They are commonly used through aerospace, automotive, and electronic industries. These materials have a complex behavior that causes their mechanical properties to vary with both temperature and frequency. Testing historically has been done on a composite material due to the inability of the coatings to support themselves at high temperatures. One common method is the vibrating beam technique, which examines two cantilever beam specimen, an uncoated beam and a coated beam. The change in modal properties is used to determine the properties of the viscoelastic material by itself. However, when the environment is harsh or space is restricted, measurements and excitations cannot be made in a traditional contacting manor. This paper examines methods of non-contact excitation and measurements and explores the effects from these methods. Specifically, magnetic excitation was examined as a source of non-contact excitation on a non-ferrous material. This requires that a magnetic material be attached to the beams in order for the magnetic excitation to be successful. The mass loading effects were examined for the two beam specimen to most accurately define the modal parameters of the beams. This excitation source was also used to test the specimen at a range of temperatures to determine the effect temperature had on the modal parameters of the specimen as well. Finite element models were subsequently created to see if the results from the experimental modal analysis could be confirmed with the FEA results.
Randall Allemang, Ph.D. (Committee Chair)
Jay Kim, Ph.D. (Committee Member)
Allyn Phillips, Ph.D. (Committee Member)
56 p.

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Citations

  • Baver, B. C. (2016). Property Identification of Viscoelastic Coatings Through Non-contact Experimental Modal Analysis [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459438426

    APA Style (7th edition)

  • Baver, Brett. Property Identification of Viscoelastic Coatings Through Non-contact Experimental Modal Analysis. 2016. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459438426.

    MLA Style (8th edition)

  • Baver, Brett. "Property Identification of Viscoelastic Coatings Through Non-contact Experimental Modal Analysis." Master's thesis, University of Cincinnati, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459438426

    Chicago Manual of Style (17th edition)