Biaxial extension of an elastic liquid

Squeeze flow theory and applications to rheometry: A review

“…Eq. (28) implies that the stresses τ ij are unchanged if the deformation rates are all changed by a constant factor, i.e. the stresses are rate-independent (hence "perfectly" plastic).…”

“…10 and 11. Both constantstrain-rate [27][28][29] and constant-speed squeezing [21,29] have also been explicitly discussed in a number of publications on squeeze flow, including comparisons with experimental data for polymeric liquids.…”

Elongational flow behavior of viscoelastic liquids: Part I. Modeling of bubble collapse

“…For polyisobutylene, T e b (the biaxial elongational viscosity) decreases with increasing elongation rate. Maerker and Schowalter (1974) have shown it is possible to use lower viscosity materials, again polyisobutylene, and achieve strain rates approaching 1 s-l. They observe first a slight decrease in ?…”

Steady Non-Viscometric Flows of Viscoelastic Liquids

“…Denson & Gallo (1971) have proposed a method of achieving a nearing constant rate of extension at the center. This method has been used by Joye et al (1972Joye et al ( , 1973 and by Maerker & Schowalter (1974). Both of these groups found that the Trouton viscosity at first decreases as the rate of .…”