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SUMMARY:Local yield stress in model amorphous solids - Sylvain Patinet\, E
 SPCI Paris
DTSTART:20211102T130000Z
DTEND:20211102T140000Z
UID:TALK162565@talks.cam.ac.uk
CONTACT:Camille Scalliet
DESCRIPTION:We develop a method to compute the local yield stresses at the
  atomic scale in model two-dimensional Lennard-Jones glasses produced via 
 differing quench protocols. This technique allows us to efficiently sample
  the local plastic rearrangements thresholds\, in a non-perturbative manne
 r\, for different loading directions\, and on well-controlled length scale
 s. The plastic rearrangement locations upon shearing the system strongly c
 orrelate with the soft zones of the quenched states [1]. In stable glasses
 \, the most relevant from an experimental point of view\, the local yield 
 stress is found to be one of the best structural indicators to predict pla
 stic activity in athermal amorphous solids [2].\nWe show that this local y
 ield stress method is highly helpful to capture the barrier dependencies t
 o glass preparation [1\,2]\, shear banding [3]\, and plastically induced a
 nisotropy [4]. It is\, therefore\, an ideal tool for documenting what happ
 ens “inside” an amorphous solid and better characterize the relationsh
 ip between structure and plasticity. From a practical point of view\, it m
 akes it possible to envision a more quantitative multi-scale modeling stra
 tegy [5].\nLocal yield stress maps. The first plastic event locations are 
 shown as open symbols numbered by order of appearance during remote shear 
 loading. Plastic events clearly tend to occur in regions characterized by 
 low yield stresses.\n\n\nReferences:\n\n[1] A. Barbot\, M. Lerbinger\, A. 
 Hernandez-Garcia\, R. García-García\, M. L. Falk\, D. Vandembroucq and S
 . Patinet\, Local yield stress statistics in model amorphous solids\, Phys
 . Rev. E 97\, 033001 (2018). \n\n[2] D. Richard\, M. Ozawa\, S. Patinet\, 
 E. Stanifer\, B. Shang\, S. A. Ridout\, B. Xu\, G. Zhang\, P. K. Morse\, J
 .-L. Barrat\, L. Berthier\, M. L. Falk\, P. Guan\, A. J. Liu\, K. Martens\
 , S. Sastry\, D. Vandembroucq\, E. Lerner\, M. L. Manning\, Predicting pla
 sticity in disordered solids from structural indicators\, Physical Review 
 Materials 4\, 113609 (2020)\n\n[3] A. Barbot\, M. Lerbinger\, A. Lemaître
 \, D. Vandembroucq\, S. Patinet\, Rejuvenation and Shear-Banding in model 
 amorphous solids\, Phys. Rev. E 101\, 033001 (2020)\n\n[4] S. Patinet\, A.
  Barbot\, M. Lerbinger\, D. Vandembroucq\, A. Lemaître\, On the Origin of
  the Bauschinger Effect in Amorphous Solids\, Accepted in Phys. Rev. Lett.
  124\, 205503 (2020)\n\n[5] D. Fernández Castellanos\, S. Roux\, S. Patin
 et\, Insights from the quantitative calibration of an elasto-plastic model
  from a Lennard-Jones atomic glass\, Comptes Rendus Physique\, Académie d
 es sciences (2021)
LOCATION:Center for Mathematical Sciences\, Lecture room MR11\, or https:/
 /maths-cam-ac-uk.zoom.us/j/98016675669
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