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Title: Method of determining dynamic properties of visco-elastic solids employing forced vibration
Authors: Lee, Tung-Ming.
Keywords: Soilds
Elastic solids
Materials testing
Dynamic testing
Vibration testing
Mechanical properties
Issue Date: Nov-1963
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Research report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 122.
Description: Research Report
Abstract: The dynamic properties of visco-elastic solids are evaluated by using the forced longitudinal and torsional vibration techniques. A method of eliminating experimental difficulties due mainly to the coupling of sample with supporting system is introduced in using Rmax (tne maximum amplitude ratio of the free end of a sample to the end attached to a driver) and fro (the corresponding vibration frequency) as a criterion. Experimental measurements of these values are sufficient to determine the dynamic properties of samples. The complex modulus is used to describe the stress-strain relationship for a visco-elastic solid. Simple expressions relating dynamic properties to Rmax and fro are obtained. In the method presented, matching of natural frequencies of the sample and the driver is not necessary and the same driving unit may be used throughout the experiment. The expressions derived for longitudinal and torsional vibrations bear direct relationship between the measured items and the dynamic properties and are simple to use.
Appears in Collections:CRREL Research Report

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