Séminaire IUSTI – 11 Juil. 2024 – 11h salle 250

Thermal avalanches as a unifying mechanism for heterogeneous flows in disordered materials

Matthieu Wyart – EPFLausanne, Suisse

I will discuss a unifying theoretical description of dynamical heterogeneities in disordered materials, which captures the competition between endogenous mechanical noise and exogenous (e.g. thermal) noise. I will discuss numerical and experimental supports for these views in the creep flows of pinned elastic manifolds, in the logarithmic aging of crumpled sheets, and in super-cooled liquids. If time permits, I will discuss a different (ongoing) work on hysteresis and shear banding on granular materials and powders.