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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2011

Robustness of avalanche dynamics in sheared amorphous solids as probed by transverse diffusion

Joyjit Chattoraj
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Anael Lemaitre

Résumé

Using numerical simulations, we perform an extensive finite-size analysis of the transverse diffusion coefficient in a sheared 2D amorphous solid, over a broad range of strain rates, at temperatures up to the supercooled liquid regime. We thus obtain direct qualitative evidence for the persistence of correlations between elementary plastic events up to the vicinity of the glass transition temperature $T_g$. A quantitative analysis of the data, combined with a previous study of the $T$- and $\dot\gamma$-dependence of the macroscopic stress \cite{ChattorajCaroliLemaitre2010}, leads us to conclude that the average avalanche size remains essentially unaffected by temperature up to $T\sim0.75 T_g$.

Dates et versions

hal-00688395 , version 1 (17-04-2012)

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Joyjit Chattoraj, Christiane Caroli, Anael Lemaitre. Robustness of avalanche dynamics in sheared amorphous solids as probed by transverse diffusion. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2011, pp.11501. ⟨10.1103/PhysRevE.84.011501⟩. ⟨hal-00688395⟩
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