title: On the Bauschinger effect in supercooled melts under shear: results from mode coupling theory and molecular dynamics simulations.
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.
authors.affiliation: Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany.
authors.forename: Fabian
authors.initials: F
authors.lastname: Frahsa
authors.forename: Amit Kumar
authors.initials: AK
authors.lastname: Bhattacharjee
authors.forename: Jürgen
authors.initials: J
authors.lastname: Horbach
authors.forename: Matthias
authors.initials: M
authors.lastname: Fuchs
authors.forename: Thomas
authors.initials: T
authors.lastname: Voigtmann
mesh_terms: D005898:Glass / Q000737:chemistry; D056004:Molecular Dynamics Simulation; D012212:Rheology