scholarly journals Nonlinear viscoelastic characterization of human vocal fold tissues under large-amplitude oscillatory shear (LAOS)

2018 ◽  
Vol 62 (3) ◽  
pp. 695-712 ◽  
Author(s):  
Roger W. Chan
Keyword(s):  
Large Amplitude ◽  
Vocal Fold ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Nonlinear Viscoelastic

Large Amplitude Oscillatory Shear Applications for the Characterization of Dispersed Systems

2015 ◽  
pp. 113-142
Author(s):  
D. Merger ◽  
K. Reinheimer ◽  
M. Grosso ◽  
J. M. Brader ◽  
M. Ballauff ◽  
...  
Keyword(s):  
Large Amplitude ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Dispersed Systems

scholarly journals Viscoelastic Rheological Behaviors of Polypropylene and LMPP Blends

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3485
Author(s):  
Feichao Zhu ◽  
Sohail Yasin ◽  
Munir Hussain
Keyword(s):  
Large Amplitude ◽  
Viscoelastic Behavior ◽  
Nonlinear Behavior ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Mechanical Responses ◽  
Nonlinear Viscoelastic ◽  
Linear Viscoelastic ◽  
Viscoelastic Behaviors ◽  
Linear And Nonlinear

Dynamic oscillatory shear testing is used to investigate polymeric viscoelastic behaviors. Small and large amplitude oscillatory shear tests are the canonical method for characterizing the linear and nonlinear viscoelastic behaviors of any polymeric material. With prominent and abundant work on linear viscoelastic studies, the nonlinear behavior is evasive in terms of generating infinite higher harmonics in the nonlinear regime. For this reason, intrinsic nonlinearities from large amplitude oscillatory shear (LAOS) studies have recently been used for insights on microstructural behaviors. This study is carried out for linear and nonlinear viscoelastic behavior with a main focus on LAOS of isostatic polypropylene (iPP) and relatively new low molecular weight and low modulus polypropylene-based polyolefin (LMPP) blends. The morphological results showed reduced spherulitic crystal nucleus size and increased distribution in blends with increasing LMPP. The blends showed subtle linear viscoelastic responses with strong nonlinear mechanical responses to variant strain and stress compared to pure iPP. The intracycle strain thickening and intracycle strain stiffening of high-content LMPP blends were comparatively dominant at medium strain amplitudes.

scholarly journals Novel tensorial Thixo-Visco-Plastic framework for rheological characterization of human blood

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
André Pincot ◽  
Matthew Armstrong
Keyword(s):  
Human Blood ◽  
Large Amplitude ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Rheological Characterization ◽  
Plastic Properties ◽  
New Approach ◽  
Oscillatory Shear Flow ◽  
Novel Model

AbstractCharacterizing human blood, a complex material with a spectrum of thixo-elasto-visco-plastic properties, through the development of more effective and efficient models has achieved special interest of late. This effort details the development a new approach, the tensorial-enhanced-Thixo-Visco-Plastic model (t-e-TVP), which integrates elements from the proven Bingham and generalized Maxwell systems to create a more robust framework and subsequently cast into a tensorial format. Here, the elastic and viscoelastic stress contributions from the microstructure are superimposed upon the viscoelastic backbone solution for stress offered by the modified TVP frame. The utility of this novel model is tested against the contemporary tensorial-ethixo-mHAWB (t-ethixo-mHAWB) framework, a similar model with a greater number of parameters, using rheological data of human blood collected on an ARESG2 strain-controlled rheometer. The blood samples are parametrically and statistically analyzed, entailing the comparison of the t-e-TVP and t-ethixo-mHAWB models with their capacity to accurately predict small and large amplitude oscillatory shear as well as unidirectional large amplitude oscillatory shear flow in blood.

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