Publication Date

1999

Document Type

Dissertation/Thesis

First Advisor

Gupta, Abhijit

Degree Name

M.S. (Master of Science)

Department

Department of Mechanical Engineering

LCSH

Urethane--Testing||Dynamics, Rigid

Abstract

Estimation of the properties of viscoelastic materials plays an important role in determining the behavior of the structures using them. To analyze the vibrational behavior of a structure bonded with viscoelastic material, estimation of its dynamic properties such as the complex modulus are critical. The objective of this thesis is to estimate the dynamic modulus of urethane using a non-resonant method (tripod test). In the tripod test method, cast cylindrical samples of urethane are strain gauged, and -- using a dual-channel FFT analyzer dynamic properties are measured as a function of frequency. A random mode of vibrations is used to excite the samples. Strain gauges estimate the dynamic strain applied on to the specimen. Four specimens of different sizes are tested. Strain gauging also aids in determining the pre-load applied onto the specimens.

Comments

Includes bibliographical references (leaf [91])

Extent

vi, 101 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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