Plastic response of a 2D Lennard-Jones amorphous solid: Detailed analysis of the local rearrangements at very slow strain rate
Laboratoire de Physique de la Matière Condensée et Nanostructures, Université Lyon 1, CNRS, UMR 5586 Domaine Scientifique de la Doua, F-69622, Villeurbanne cedex, France
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Accepted: 13 July 2006
Published online: 24 July 2006
We analyze in detail the atomistic response of a model amorphous material submitted to plastic shear in the athermal, quasi-static limit. After a linear stress-strain behavior, the system undergoes a noisy plastic flow. We show that the plastic flow is spatially heterogeneous. Two kinds of plastic events occur in the system: quadrupolar localized rearrangements, and shear bands. The analysis of the individual motion of a particle shows also two regimes: a hyper-diffusive regime followed by a diffusive regime, even at zero temperature.
PACS: 61.43.Er Other amorphous solids – / 62.20.-x Mechanical properties of solids – / 62.20.Fe Deformation and plasticity (including yield, ductility, and superplasticity) –
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2006