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SUMMARY:ENAC Seminar Series by Dr. Fabian Barras
DTSTART:20230515T133000
DTEND:20230515T143000
DTSTAMP:20260506T053823Z
UID:1dc1b1f18738ac4949d1dd5f3f7b8d3a00c0b5f0496db770b0d4960d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Fabian Barras\n13:30-14:30  - Dr. Fabian Barras\nPostdoc
 toral Fellow\, University of Oslo\n\nSlip sliding away: the onset of cata
 strophic failures in geomaterials\n \nEarthquakes\, glacier instabilities
  and collapses\, snow slab avalanches\, land and rock slides\; many of the
  various kinds of unpredictable natural disasters are preceded by the prop
 agation of localized slip surfaces through geomaterials. In a context of g
 lobal climate change\, there is an increasing need for engineers and polic
 y makers to assess the risks of geomaterial failures posed by the rapid tr
 ansformation of alpine and polar environments. The difficulty of predictin
 g and anticipating these catastrophic events is threefold. First\, the pro
 pagation of the rupture that precedes sliding is often fast and can cross 
 regions of the material that are not a priori prone to failure. Second\, t
 he loss of material strength along the created slip surface arises from mi
 cro-mechanical processes within narrow bands of intense shear strains. Thi
 rd\, the micro-mechanical response of geomaterials is characterized by the
  interplay of a solid matrix\, which can either be continuous\, fractured\
 , or granular\, and fluids that fill the pore space. This lecture will pre
 sent recent experimental and numerical efforts to shine light on the coupl
 ed solid and fluid mechanics controlling failure at the pore scale of geom
 aterials and to bridge them to the structural scale where the slip surface
  propagates.\n\nShort bio:\nDr. Fabian Barras is a civil engineer who grad
 uated from EPFL (M.Sc. in 2013\, Ph.D. in 2018). During his doctoral thesi
 s\, he developed and implemented numerical models to simulate the dynamic 
 propagation of fractures in brittle materials. Recipient of a SNSF Early P
 ostDoc Mobility fellowship\, he joined the Njord Centre at the University 
 of Oslo in 2019\, where he is working at the interface between geologists 
 and physicists of porous media on the catastrophic propagation of shear fa
 ilures in geomaterials. As a participant of the ERC project BREAK\, he is 
 currently investigating the impact of fluid at the pore scale during these
  failure processes through the synergistic development of computational mo
 dels and synchrotron X-ray microtomography.\n\n\n\n 
LOCATION:GC B1 10 https://plan.epfl.ch/?room==GC%20B1%2010
STATUS:CONFIRMED
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