scholarly journals Describing and prescribing the constitutive response of yield stress fluids using large amplitude oscillatory shear stress (LAOStress)

2013 ◽  
Vol 57 (1) ◽  
pp. 27-70 ◽  
Author(s):  
Christopher J. Dimitriou ◽  
Randy H. Ewoldt ◽  
Gareth H. McKinley
Keyword(s):  
Shear Stress ◽  
Yield Stress ◽  
Large Amplitude ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Yield Stress Fluids ◽  
Constitutive Response ◽  
Oscillatory Shear Stress

Stress bifurcation in large amplitude oscillatory shear of yield stress fluids

2018 ◽  
Vol 62 (1) ◽  
pp. 89-106 ◽  
Author(s):  
Kai Yang ◽  
Zhiwei Liu ◽  
Jun Wang ◽  
Wei Yu
Keyword(s):  
Yield Stress ◽  
Large Amplitude ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Yield Stress Fluids

The Transition to Quasi-Periodicity for Molten Plastics in Large Amplitude Oscillatory Shear

1994 ◽  
Vol 116 (4) ◽  
pp. 446-450 ◽  
Author(s):  
D. W. Adrian ◽  
A. J. Giacomin
Keyword(s):  
Shear Stress ◽  
Stress Response ◽  
Large Amplitude ◽  
Average Molecular Weight ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Weight Average Molecular Weight ◽  
Amplitude Spectra ◽  
Shear Stress Response ◽  
Even Harmonics

Large amplitude oscillatory shear (LAOS) experiments on three grades of LLDPE including one commercial film blowing resin showed an interesting transition in the shear stress response to LAOS. The shear stress response is initially a nonsinusoidal standing wave which then undergoes a transition to quasi-periodicity. Many line-broadened odd and even harmonics were found in the shear stress amplitude spectra of the quasi-periodic responses. The transition time depends on shear strain amplitude and frequency, but it did not correlate with the weight average molecular weight of the LLDPE’s.

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