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SUMMARY:Unified modeling of snow and avalanche mechanics using the Materia
 l Point Method
DTSTART:20180412T161500
DTEND:20180412T171500
DTSTAMP:20260916T032118Z
UID:8d93335956ffe75ef30feeb37f669665ecfd13b936e70a8f533b6f4c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Johan Gaume (CRYOS\, EPFL)\nAbstract. Snow slab avalanch
 es start with the failure of a weak snow layer buried below a cohesive sno
 w slab. After failure\, the very porous character of the weak layer leads 
 to its volumetric collapse and thus closing of crack faces due to the weig
 ht of the overlaying slab. This complex process\, generally referred to as
  anticrack\, explains why avalanches can  be  remotely  triggered  fro
 m  flat  terrain.  On  the  basis  of  a  new  elastoplasticity 
  model  for  porous  cohesive materials and the Material Point Method (
 MPM)\, we accurately reproduce the propagation dynamics of anticracks obse
 rved in snow fracture experiments as well as the subsequent detachment of 
 the slab and the flow of the avalanche. In particular\, we performed 3D sl
 ope scale simulations of both the release and flow of slab avalanches trig
 gered either directly or remotely.\n\nBio. Dr. Johan Gaume is a research 
 and teaching associate in the CRYOS lab. of EPFL and scientist at the SLF 
 in Davos. His research is focused on the numerical modeling of snow fractu
 re and avalanche mechanics in order to improve avalanche forecasting. Last
  summer\, he was visiting scholar in the Department of Mathematics of UCLA
  where he worked on a new snow avalanche model in the research group of Jo
 seph Teran who contributed to the snow simulations in the Disney movie “
 Frozen”.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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