Strain dependent damping characteristics of a high damping manganese-copper alloy

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Author
Dew, Dwight D.
Date
1986Advisor
Shin, Y.S.
Second Reader
Perkins, A. J.
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Show full item recordAbstract
This paper presents the studies on measurement techniques developed for the
determination of strain-dependent damping characteristics of materials in an air
environment. The material is a high damping manganese-copper alloy called Sonoston.
The measurement techniques employ cantilevercd flat beam specimens in bending and
cylindrical specimens in torsion. The specimens were subjected to three different heat
and aging treatments. Pure random and sinusoidal sweep excitations are used as an
excitation source in the frequency range of 20 to 500 Hz. Miniature acceleromcters
and strain gages were mounted on the specimens to obtain both input excitation and
output responses. The results of the investigation are presented graphically as damping
factor vs. resonant frequency, damping factor vs. strain, damping factor vs. input
acceleration, strain vs. resonant frequency, strain vs. input acceleration, and input
acceleration vs. resonant frequency.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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