Nonlinear viscoelastic properties of human vocal fold tissues under large-amplitude oscillatory shear

2011 ◽  
Vol 130 (4) ◽  
pp. 2551-2551
Author(s):  
Elhum Naseri ◽  
Mindy Du ◽  
Roger W. Chan
Keyword(s):  
Large Amplitude ◽  
Viscoelastic Properties ◽  
Vocal Fold ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Nonlinear Viscoelastic

Nonlinear viscoelastic properties of MR fluids under large-amplitude-oscillatory-shear

2002 ◽  
Vol 42 (3) ◽  
pp. 280-286 ◽  
Author(s):  
Weihua H. Li ◽  
Hejun Du ◽  
Guang Chen ◽  
Song Huat Yeo ◽  
Ningqun Guo
Keyword(s):  
Large Amplitude ◽  
Viscoelastic Properties ◽  
Oscillatory Shear ◽  
Large Amplitude Oscillatory Shear ◽  
Mr Fluids ◽  
Nonlinear Viscoelastic

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.

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