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The build-up and relaxation of stresses in a glass-forming soft-sphere mixture under shear

A computer simulation study
: Zausch, J.; Horbach, J.


epl. A letters journal exploring the frontiers of physics 88 (2009), No.6, Art. 60001, 5 pp.
ISSN: 0302-072X
ISSN: 0295-5075
ISSN: 1286-4854
Journal Article
Fraunhofer ITWM ()

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.