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@ARTICLE{Poulos:255636,
author = {Poulos, Andreas-Stavros and Renou, Frédéric and Jacob,
Alan R. and Koumakis, Nick and Petekidis, George},
title = {{L}arge amplitude oscillatory shear ({LAOS}) in model
colloidal suspensions and glasses: frequency dependence},
journal = {Rheologica acta},
volume = {54},
number = {8},
issn = {1435-1528},
address = {Berlin},
publisher = {Springer},
reportid = {FZJ-2015-05771},
pages = {715 - 724},
year = {2015},
abstract = {We investigate the effect of frequency on the non-linear
large amplitude oscillatory shear (LAOS) response of
concentrated colloidal suspensions of model soft and hard
spheres at various concentrations, both below and above the
glass transition. We show that the anharmonic response in
the stress increases with frequency for liquid-like samples
but decreases with frequency for solid-like samples. We
argue that for samples below the glass transition, higher
frequencies involving higher maximum shear rates promote
shear thinning and increase anharmonicity. On the other
hand, solid-like samples deform plastically at low
frequencies as they are subjected to low shear rates within
the period. Higher frequencies (higher average shear rates)
lead to viscous flow over a larger fraction of the period
thereby decreasing anharmonic behavior. We also demonstrate
that LAOS experiments in strain-controlled rheometry at
moderately high frequencies (ω > 5 rad/s) have to be
very carefully interpreted, due to the superharmonic
instrumental resonance effects.},
cin = {IFF-5 / Neutronenstreuung ; JCNS-1},
ddc = {530},
cid = {I:(DE-Juel1)VDB785 / I:(DE-Juel1)JCNS-1-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000358605000005},
doi = {10.1007/s00397-015-0865-8},
url = {https://juser.fz-juelich.de/record/255636},
}