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The European Physical Journal E

, Volume 26, Issue 3, pp 283–293 | Cite as

On the study of local-stress rearrangements during quasi-static plastic shear of a model glass: Do local-stress components contain enough information?

  • M. Tsamados
  • A. TanguyEmail author
  • F. Léonforte
  • J. -L. Barrat
Regular Article

Abstract.

We present a numerical study of the mechanical response of a 2D Lennard-Jones amorphous solid under steady quasi-static and athermal shear. We focus here on the evolution of local stress components. While the local stress is usually taken as an order parameter in the description of the rheological behaviour of complex fluids, and for plasticity in glasses, we show here that the knowledge of local stresses is not sufficient for a complete description of the plastic behaviour of our system. The distribution of local stresses can be approximately described as resulting from the sum of localized quadrupolar events with an exponential distribution of amplitudes. However, we show that the position of the center of the quadrupoles is not related to any special evolution of the local stress, but must be described by another variable.

PACS.

61.43.Er Other amorphous solids 62.20.F- Deformation and plasticity 81.05.Kf Glasses (including metallic glasses) 

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Copyright information

© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2008

Authors and Affiliations

  • M. Tsamados
    • 1
  • A. Tanguy
    • 1
    Email author
  • F. Léonforte
    • 2
  • J. -L. Barrat
    • 1
  1. 1.Laboratoire de Physique de la Matière Condensée et NanostructuresUniversité de Lyon; Univ. Lyon IVilleurbanneFrance
  2. 2.INSA LyonMATEISVilleurbanneFrance

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