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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2010

Dynamics below the depinning transition of interacting dislocations moving over fields of obstacles

R. Li
  • Fonction : Auteur
R. C. Picu
  • Fonction : Auteur
J. Weiss

Résumé

The transition from the behavior of a single dislocation interacting with a field of fixed obstacles to the collective motion of multiple dislocations is studied below the depinning transition (thermally activated glide). In absence of interactions, a truncated power law distribution of jump amplitudes (avalanches) with a diverging cutoff toward the critical point, and intermittency are observed. Interactions lead to a modification of the correlation length exponent below the critical point and to more pronounced intermittency, a dynamics more compatible to acoustic emission experimental data.

Domaines

Glaciologie
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insu-00562241 , version 1 (16-03-2022)

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R. Li, R. C. Picu, J. Weiss. Dynamics below the depinning transition of interacting dislocations moving over fields of obstacles. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2010, 82 (2), pp.022107. ⟨10.1103/PHYSREVE.82.022107⟩. ⟨insu-00562241⟩
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