Dresden 2017 – wissenschaftliches Programm
MM 61: Topical session: Dynamics, relaxation and deformation in deeply supercooled metallic liquids and glasses V - dynamical response
MM 61.4: Vortrag
Donnerstag, 23. März 2017, 12:45–13:00, IFW A
Yielding transition in a binary model glass under oscillatory shear: Molecular Dynamics computer simulation — •Juergen Horbach1, Gaurav Prakash Shrivastav1, and Pinaki Chaudhuri2 — 1Institut für Theoretische Physik II, Universität Düsseldorf, Germany — 2The Institute of Mathematical Sciences, Chennai, India
Under shear, a glass may exhibit the transition from an elastically deformed state to plastic flow. The nature of the yield point at which this transition occurs is a highly debated issue. We use molecular dynamics simulation to study a model of a Ni80P20 glass under oscillatory shear. Recently, we have shown that the yielding in this system can be associated with a directed percolation transition of mobile regions [1-3]. Under oscillatory shear, the occurrence of a yielding transition depends on the maximal strain amplitude, γmax, in each cycle. We show that the time scale at which the transition occurs diverges at a finite value of γmax.
 G. P. Shrivastav, P. Chaudhuri, and J.Horbach, Phys. Rev. E 94, 042605 (2016).
 G. P. Shrivastav, P. Chaudhuri, and J. Horbach, J. Rheol. 60, 835 (2016).
 I. Binkowski, G. P. Shrivastav, J. Horbach, S. V. Divinski, and G. Wilde, Acta Mater. 109, 330 (2016).