EXPERIMENTAL TECHNIQUE FOR DETERMINING SOME DYNAMIC PROPERTIES OF VISCOELASTIC MATERIALS
Abstract
An experimental technique is described, by which some basic properties of viscoelastic materials such as phase velocity, loss factor and stress relaxation function could be derived. The technique is based on the propagation and reflection of longitudinal stress pulses in a system of two bars, one of which is elastic with known properties and the other viscoelastic with properties to be determined. It is shown that the unknown properties of the viscoelastic bar may be determined from the shapes of the incident and reflected stress pulses which travel in the elastic bar. It turns out, however, that the only material property which may be derived with reasonable accuracy is the phase velocity for the basic frequency of the pulses propagating along the bars. All the other material properties proved to be extremely sensitive to small experimental errors and hence no reliable values for them could be derived.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1969
- Accession Number
- AD0696435
Entities
People
- Amnon Meer
Organizations
- Brown University