Volume 88, Number 6, December 2009
|Number of page(s)||5|
|Published online||17 December 2009|
The build-up and relaxation of stresses in a glass-forming soft-sphere mixture under shear: A computer simulation study
Institut für Physik, Johannes Gutenberg-Universität Mainz - Staudinger Weg 7, D-55099 Mainz, Germany, EU
2 Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR) 51170 Köln, Germany, EU
Corresponding author: firstname.lastname@example.org
Accepted: 27 November 2009
Molecular-dynamics computer simulations in conjunction with Lees-Edwards boundary conditions are used to investigate a glass-forming binary Yukawa fluid under shear. The transition from the elastic response to plastic flow is elucidated by studying the stress relaxation after switching off the shear. We find a slow stress relaxation starting from states in the elastic regime and a fast one starting from states in the plastic-flow regime. We show that these relaxation patterns are related to a different distribution of local microscopic stresses in both cases.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 47.50.Cd – Non-Newtonian fluid flows: Modeling / 83.60.Rs – Shear rate-dependent structure (shear thinning and shear thickening)
© EPLA, 2009
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