Viscoelasticity and rheological hysteresis

Rheological characterization of complex fluids subjected to cyclic shear-rate sweep often exhibits hysteresis. Since both viscoelastic and thixotropic materials show hysteresis loops, it is important understand distinguishing features (if any) in the same shown by either. Lately, there has been substantial work that attempts relate area enclosed loop with manner which shear rate varied cycle, order infer parameters a material. In this work, we use nonlinear Giesekus model study its response application sweep. We find produces each type ualitatively similar hitherto ascribed materials. also for material as function shows bell-shaped/bi-modal curves observed This illustrates caution needs be exercised while attributing loops associated exclusively thixotropy. Another feature related occurrence banding instability. may not have any connection