Regensburg 2013 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 9: Glasses and Glass Transition I (joint session with CPP, DY)
DF 9.8: Vortrag
Montag, 11. März 2013, 17:00–17:15, H34
Shear banding in hard sphere glasses — Segun Ayodele1, Dierk Raabe1, Ingo Steinbach2, and •Fathollah Varnik1,2 — 1Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany — 2ICAMS, Ruhr Universität Bochum, Germany
When an amorphous solid is exposed to a simple shear such as a planar Couette flow, the flow may become heterogeneous despite the fact that the macroscopic stress is constant across the system [1,2]. However, both in computer simulations [1,3] and experiments [2] the observed velocity profile is unsteady with significant spatio-temporal fluctuations. In this work, we address the question whether a steady shear banded solution may exist. For this purpose, we both perform an analysis of the underlying equations as well as lattice Boltzmann simulations, using as input the constitutive laws obtained from MD simulations [3].
[1] F. Varnik, L. Bocquet, J.-L. Barrat, L. Berthier, Phys. Rev. Lett. 90, 095702 (2003).
[2] R. Besseling, L. Isa, P. Ballesta, G. Petekidis, M.E. Cates, W.C.K. Poon, Phys. Rev. Lett. 105, 268301 (2010).
[3] S. Mandal, M. Gross, D. Raabe, F. Varnik, Phys. Rev. Lett. 108, 098301 (2012).