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Poisson's ratio in linear viscoelasticity - a critical reviewTschoegl, Nicholas W. ; Knauss, Wolfgang G. ; Emri, IgorPoisson's ratio is an elastic constant defined as the ratio of the lateral contraction to the elongation in the infinitesimal uniaxial extension of a homogeneous isotropic body. In a viscoelastic ... material Poisson's ratio is a function of time (or frequency) that depends on the time regime chosen to elicit it. It is important as one of the material functions that characterize bulk behavior. This paper develops the linear theory of the time- or frequency-dependent Poisson's ratio, and it reviews work on its experimental determination. The latter poses severe difficulties in view of the high accuracy required. Thus, reliable information on the viscoelastic Poisson's ratio is as yet rather scanty. The paper also reports on attempts to measure the Poisson's ratio of a viscoelastic material as a function of temperature. Lateral contraction in creep and at constant rate of extension receives attention as well.Vir: Mechanics of time-dependent materials : an international journal devoted to the time-dependent behaviour of materials and structures. - ISSN 1385-2000 (Vol. 6, no. 1, 2002, 3-51)Vrsta gradiva - članek, sestavni delLeto - 2002Jezik - angleškiCOBISS.SI-ID - 5039899
Avtor
Tschoegl, Nicholas W. |
Knauss, Wolfgang G. |
Emri, Igor
Teme
viskoelastičnost linearna |
materiali sipki |
napetosti |
deformacije |
Poisson |
karakterizacija materialov |
bulk behavior |
frequency dependence |
lateral contraction |
material characterization |
Poisson strain |
Poisson stress |
Poisson's ratio |
time dependence |
temperature dependence |
viscoelastic behavior
Vnos na polico
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