TITLE

On the Bauschinger effect in supercooled melts under shear: Results from mode coupling theory and molecular dynamics simulations

AUTHOR(S)
Frahsa, Fabian; Bhattacharjee, Amit Kumar; Horbach, Jürgen; Fuchs, Matthias; Voigtmann, Thomas
PUB. DATE
March 2013
SOURCE
Journal of Chemical Physics;Mar2013, Vol. 138 Issue 12, p12A513
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We study the nonlinear rheology of a glass-forming binary mixture under the reversal of shear flow using molecular dynamics simulations and a schematic model of the mode-coupling theory of the glass transition (MCT). Memory effects lead to a history-dependent response, as exemplified by the vanishing of a stress-overshoot phenomenon in the stress-strain curves of the sheared liquid, and a change in the apparent elastic coefficients around states with zero stress. We investigate the various retarded contributions to the stress response at a given time schematically within MCT. The connection of this macroscopic response to single-particle motion is demonstrated using molecular-dynamics simulation.
ACCESSION #
86446750

 

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