Issue |
Europhys. Lett.
Volume 75, Number 6, September 2006
|
|
---|---|---|
Page(s) | 915 - 921 | |
Section | Condensed matter: structural, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2006-10203-9 | |
Published online | 09 August 2006 |
Nonlinear viscoelasticity of metastable complex fluids
1
Department of Chemistry, Columbia University 3000 Broadway, New York, NY 10027, USA
2
Department of Physics & DEAS, Harvard University - Cambridge, MA 02138, USA
Received:
15
February
2006
Accepted:
21
July
2006
Many metastable complex fluids such as colloidal glasses and gels show distinct nonlinear viscoelasticity with increasing oscillatory-strain amplitude; the storage modulus decreases monotonically as the strain amplitude increases whereas the loss modulus has a distinct peak before it decreases at larger strains. We present a qualitative argument to explain this ubiquitous behavior and use mode-coupling theory (MCT) to confirm it. We compare theoretical predictions to the measured nonlinear viscoelasticity in a dense hard-sphere colloidal suspension; reasonable agreement is obtained. The argument given here can be used to obtain new information about linear viscoelasticity of metastable complex fluids from nonlinear strain measurements.
PACS: 64.70.Pf – Glass transitions / 83.60.Rs – Shear rate-dependent structure (shear thinning and shear thickening) / 83.80.Hj – Suspensions, dispersions, pastes, slurries, colloids
© EDP Sciences, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.