recoverable shear

recoverable shear

[ri′kəv·rə·bəl ′shir]
(fluid mechanics)
Measure of the elastic content of a fluid, related to elastic recovery (mechanicallike property of elastic recoil); found in unvulcanized, unfilled natural rubber, and certain polymer solutions, soap gels, and biological fluids.
References in periodicals archive ?
Differences in the polymer architecture directly impact processability and flow behavior, such as flow rate, die swell, melt stability, recoverable shear and internal stresses in blow molding, injection molding, sheet forming, cable jacket extrusion, among other production processes (refs.
Melt elasticity can also be determined by the recoverable shear strain [7] according to Eq.
Gullet and Seriai (2) stated that the swelling phenomenon is mainly due to the recoverable elongational strain induced by the converging flow at the die entrance, as well as by recoverable shear strain originating within the die.
44) on blown polyethylene (PE) films has found that the total haze percent exhibited a complex parabolic relationship with the logarithm of the recoverable shear strain parameter.
the apparent wall shear rate, the shear stress at the wall, or the recoverable shear strain.
The recoverable shear compliance versus blend composition for the stabilized blends is shown in Fig.
Recall from Eq 2 that the recoverable shear compliance depends upon both the zero shear viscosity and G'/[[omega].
Although it is understood that elastic behavior involves no dissipation of energy and no time-dependence, the term has been considered to be synonymous or has been related to viscoelastic functions such as normal stress differences and storage modulus; also, to extensional viscosity, recoverable shear strain, entrance-exit pressure drop (Bagley correction) (2-4), and parameters of practical importance in polymer processing such as extrudate swell and melt strength (5, 6).
For long dies Tanner (23, 27), showed that the swell is a function of the recoverable shear [[Gamma].