Journal of Rheology, Vol.41, No.5, 1021-1038, 1997
Multiaxial Linear Viscoelastic Behavior of a Soda-Lime-Silica Glass Based on a Generalized Maxwell Model
The multiaxial linear viscoelastic behavior of a soda-lime-silica glass has been investigated in the transition range using shear and uniaxial creep-recovery experiments. The shear and uniaxial viscoelastic constants and retardation functions have been precisely measured. The no-stress and the no-temperature dependence of the viscoelastic constants show, respectively, linear viscoelastic and simple thermorheological behaviors of the glass. The deviatoric part of the viscoelastic behavior is first investigated from the shear experimental data. A generalized Maxwell model with one set of parameters is shown to correctly simulate the shear creep-recovery experiments. Using the deviatoric part of the model, the spheric part of the viscoelastic behavior is deduced from the uniaxial experimental data. In particular, we show experimental measurements of the bulk equilibrium modulus and the temperature dependence of the hydrostatic pressure viscoelastic behavior for a soda-lime-silica glass. A second set of parameters of the generalized Maxwell model is determined for the hydrostatic pressure viscoelastic behavior.
Keywords:RELAXATION