A review of nonlinear oscillatory shear tests: Analysis and application of large amplitude oscillatory shear (LAOS)

K Hyun, M Wilhelm, CO Klein, KS Cho, JG Nam… - Progress in polymer …, 2011 - Elsevier
Dynamic oscillatory shear tests are common in rheology and have been used to investigate
a wide range of soft matter and complex fluids including polymer melts and solutions, block …

New measures for characterizing nonlinear viscoelasticity in large amplitude oscillatory shear

RH Ewoldt, AE Hosoi, GH McKinley - Journal of Rheology, 2008 - pubs.aip.org
Characterizing purely viscous or purely elastic rheological nonlinearities is straightforward
using rheometric tests such as steady shear or step strains. However, a definitive framework …

Fourier‐transform rheology

M Wilhelm - Macromolecular materials and engineering, 2002 - Wiley Online Library
The application of large amplitude oscillatory shear (LAOS) leads, in the non‐linear regime,
to a torque response that contains higher mechanical harmonic contributions. These …

Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials

RH Ewoldt, P Winter, J Maxey, GH McKinley - Rheologica acta, 2010 - Springer
We explore the utility of strain-controlled large amplitude oscillatory shear (LAOS)
deformation for identifying and characterizing apparent yield stress responses in …

Establishing a New Mechanical Nonlinear Coefficient Q from FT-Rheology: First Investigation of Entangled Linear and Comb Polymer Model Systems

K Hyun, M Wilhelm - Macromolecules, 2009 - ACS Publications
The nonlinear response of monodisperse linear and comb polymer melts has been
investigated under oscillatory shear with Fourier-transform rheology (FT-rheology). The …

Determination of the non-linear parameter (mobility factor) of the Giesekus constitutive model using LAOS procedure

A Calin, M Wilhelm, C Balan - Journal of non-newtonian fluid mechanics, 2010 - Elsevier
The paper introduces a novel procedure to determine the non-linear parameter of the
Giesekus model, in relation to the characterization of the non-linear oscillatory shear regime …

Separation of the nonlinear oscillatory response into a superposition of linear, strain hardening, strain softening, and wall slip response

CO Klein, HW Spiess, A Calin, C Balan… - Macromolecules, 2007 - ACS Publications
Water-based dispersions and emulsions are used as model systems for a new rheological
data analysis. The application of large amplitude oscillatory shear can be used to generate a …

Analysis of medium amplitude oscillatory shear data of entangled linear and model comb polymers

MH Wagner, VH Rolón-Garrido, K Hyun… - Journal of Rheology, 2011 - pubs.aip.org
Studying the mechanical response of nearly monodisperse linear and comb polystyrene
(PS) melts to medium amplitude oscillatory shear (MAOS), Hyun and Wilhelm …

Nonlinear response of dense colloidal suspensions under oscillatory shear: Mode-coupling theory and Fourier transform rheology experiments

JM Brader, M Siebenbürger, M Ballauff… - Physical Review E …, 2010 - APS
Using a combination of theory, experiment, and simulation we investigate the nonlinear
response of dense colloidal suspensions to large amplitude oscillatory shear flow. The time …

Microstructure and nonlinear signatures of yielding in a heterogeneous colloidal gel under large amplitude oscillatory shear

J Kim, D Merger, M Wilhelm, ME Helgeson - Journal of Rheology, 2014 - pubs.aip.org
We investigate yielding in a colloidal gel that forms a heterogeneous structure, consisting of
a two-phase bicontinuous network of colloid-rich domains of fractal clusters and colloid-poor …