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SUMMARY:An overview of universal avalanche statistics at the yielding tran
 sition of amorphous solids
DTSTART:20190211T140000
DTEND:20190211T153000
DTSTAMP:20260930T205847Z
UID:d875126652034c5b397e40c3afbd033d2fd3784324caeeccaa3d6aa6
CATEGORIES:Conferences - Seminars
DESCRIPTION:Ezequiel Ferrero\nIn the last years\, several groups have desc
 ribed the yielding phenomenon in the deformation of amorphous materials fr
 om a statistical physics point of view. To that end\, coarse-grained appro
 aches to amorphous solids were introduced\, the so-called elasto-plastic m
 odels (EPM) [1].\nIn this talk\, I will focus on the statistics of avalanc
 hes produced by the characteristic stick-slip behavior close to the yieldi
 ng transition\, enquiring into its common properties among different EPM p
 roposals. I will present in particular the less studied case of EPMs with 
 stress-dependent transition rates for local yielding [2]\, which help us t
 o see how "dynamical" exponents -those related to the driving speed- may d
 epend on the model details while universality stands more robust for "stat
 ic" critical exponents.\nOn the way\, the current understanding of yieldin
 g from mean-field descriptions and comparison with the depinning transitio
 n of a driven elastic line in random media\, will be briefly discussed. If
  time permits\, I will further comment on the the strain-rate dependence [
 3] and inertial effects [4] on the statistics of avalanches as we depart\,
  respectively\, from the usually addressed quasistatic and overdamped limi
 ts.\n \nReferences:\n \n[1] Deformation and flow of amorphous solids: a 
 review of mesoscale elastoplastic models\nA. Nicolas\, E.E. Ferrero\, K. M
 artens\, J.-L. Barrat\nRev. Mod. Phys. 90\, 045006 (2018)\n \n[2] Static 
 and dynamic critical exponents for elastoplastic models of amorphous solid
 s\nE.E. Ferrero and E.A. Jagla\, (unpublished).\n \n[3] Driving Rate Depe
 ndence of Avalanche Statistics and Shapes at the Yielding Transition\nC. L
 iu\, E.E. Ferrero\, F. Puosi\, J.-L. Barrat\, and K. Martens\nPhys. Rev. L
 ett. 116\, 065501 (2016)\n \n[4] Inertia and universality of avalanche st
 atistics: The case of slowly deformed amorphous solids\nK. Karimi\, E.E. F
 errero\, J.-L. Barrat\nPhys. Rev. E 95\, 013003 (2017)
LOCATION:BSP 407 https://plan.epfl.ch/?room==BSP%20407
STATUS:CONFIRMED
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