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Poisson's Ratio in Linear Viscoelasticity – A Critical Review

Tschoegl, N. W. and Knauss, Wolfgang G. and Emri, Igor (2002) Poisson's Ratio in Linear Viscoelasticity – A Critical Review. Mechanics of Time-Dependent Materials, 6 (1). pp. 3-51. ISSN 1385-2000. doi:10.1023/a:1014411503170.

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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.

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Additional Information:© 2002 Kluwer Academic Publishers. Received 1 June 2001. The authors gratefully acknowledge the cooperation of Matjaž Samarin of the Center of Experimental Mechanics in assembling and excerpting references.
Subject Keywords:bulk behavior; frequency dependence; lateral contraction; material characterization; Poisson strain and stress; Poisson's ratio; time dependence; temperature dependence; viscoelastic behavior
Issue or Number:1
Record Number:CaltechAUTHORS:20191008-150952468
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Official Citation:Tschoegl, N., Knauss, W.G. & Emri, I. Mechanics of Time-Dependent Materials (2002) 6: 3.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99164
Deposited By: Tony Diaz
Deposited On:08 Oct 2019 22:16
Last Modified:16 Nov 2021 17:44

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