fitting parameters obtained from the Weibull distribution function model and the Schapery recovery model for neat LDPE and the composites.
The viscosity, performance grade (PG), creep and creep recovery
, and frequency sweep tests were carried out on modified binder.
This work employs various chemical methods to synthesize [Fe.sub.3][ O.sub.4] magnetic particles of various sizes and [Fe.sub.3][ O.sub.4] magnetic nanowire and to form them into MR fluids, whose MR properties, including shear yield stress, compression resistance, creep recovery
, and yield strength decay, are then observed.
After a certain time t load P was removed and creep recovery
Yaniv, Creep and Creep Recovery
Response of Load Cells Tested According to U.S.
At the end of the specified time, both cases were unloaded, the initial deflection recovery measured, and measurement of creep recovery
continued for an additional three months.
Zero shear viscosity can be determined with a creep recovery
Elevated temperatures have the effect of increasing the rate processes (e.g., creep recovery
) in PE which may lead to premature interference between the liner and host pipe.
For the creep recovery
test, the constant stress was applied (blend system: [tau] = l, 10, 100 Pa, fibers: [tau] = 100 Pa) and the strain was monitored versus time.
Conversely, by running the motor in open-loop mode, stress controlled tests such as creep and creep recovery
can be performed.
However creep recovery
is always below 100% due to viscous nature of the polymeric material.
In the creep recovery
test, elastic deformation is restored.