Poisson's Ratio in Linear Viscoelasticity – A Critical Review
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Poisson's ratio is an elastic constant defined as the ratio of thelateral contraction to the elongation in the infinitesimal uniaxialextension of a homogeneous isotropic body. In a viscoelastic materialPoisson's ratio is a function of time (or frequency) that depends on thetime regime chosen to elicit it. It is important as one of the materialfunctions that characterize bulk behavior.
This paper develops the linear theory of the time- orfrequency-dependent Poisson's ratio, and it reviews work on itsexperimental determination. The latter poses severe difficulties in viewof the high accuracy required. Thus, reliable information on theviscoelastic Poisson's ratio is as yet rather scanty.
The paper also reports on attempts to measure the Poisson's ratioof a viscoelastic material as a function of temperature. Lateralcontraction in creep and at constant rate of extension receivesattention as well.
- Poisson's Ratio in Linear Viscoelasticity – A Critical Review
Mechanics of Time-Dependent Materials
Volume 6, Issue 1 , pp 3-51
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers
- Additional Links
- bulk behavior
- frequency dependence
- lateral contraction
- material characterization
- Poisson strain and stress
- Poisson's ratio
- time dependence
- temperature dependence
- viscoelastic behavior
- Industry Sectors
- Author Affiliations
- 1. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, U.S.A.
- 2. Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125, U.S.A.