METHOD OF DETERMINING DYNAMIC PROPERTIES OF VISCO-ELASTIC SOLIDS EMPLOYING FORCED VIBRATION,
Abstract
The dynamic properties of visco-elastic solids are evaluated by using the forced longitudanal and torsional vibration techniques. A method of eliminating experimental difficulties due mainly to the coupling of sample with supporting system is introduced in using the maximum amplitude ratio of the free end of a sample to the end attached to a driver and 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. In the method presented for alloting the auiplitude ratio and vibration frequency, matchin 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. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1963
- Accession Number
- AD0434085
Entities
People
- Tung-ming Lee
Organizations
- Cold Regions Research and Engineering Laboratory