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UID:20260923T142049EDT-8261X5VBnd@132.216.98.100
DTSTAMP:20260923T182049Z
DESCRIPTION: \n\nStudent Seminar Series\n\nDepartment of Atmospheric & Ocea
 nic Sciences\n\npresents\n\na talk by\n\nMathieu Plante\n	PhD student\n\nIm
 proving the damage parameterization of the Maxwell Elasto-Brittle rheology
  to better resolve the orientation of ice fractures\n\nThe Maxwell Elasto 
 Brittle (MEB) rheology (Dansereau et al.\, 2016) is a damage parameterizat
 ion based rheology that was developed to better represent the fracture of 
 ice. This rheology was implemented in the Lagrangian sea ice model neXtSIM
  (Rampal et al.\, 2015)\, and was shown to adequately represent the statis
 tics of sea ice deformation fields. This new physics governing the fractur
 e of sea ice remains however highly parameterized. In recent years\, we im
 plemented the MEB rheology in the Eulerian framework commonly used in the 
 sea ice modelling community. In ideal ice bridge experiments\, it was show
 n that the damage parameterization is unstable under large compression\, l
 acks strain hardening properties and produces angles of fracture that do n
 ot follow theory. Here\, we use ideal uniaxial compression simulations to 
 identify the origin of these instabilities\, to quantify the deviation of 
 the angles of fracture from the theory and to determine the flow rule impl
 ied by the damage parameterization. We propose a modification to the param
 eterization that improves both the model stability and the simulated orien
 tation of the lines of fracture. We however stress that the modifications 
 are yet not tantamount to including a flow rule\, such that the type of de
 formation associated to the ice fracture remains dissociated from the yiel
 d parameters.\n\nWednesday Dec 04/ 2.30 PM/ Room 934 Burnside Hall\n\n \n
 \n \n\n \n
DTSTART:20191204T193000Z
DTEND:20191204T203000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Improving the damage parameterization of the Maxwell Elasto-Brittle
  rheology to better resolve the orientation of ice fractures
URL:https://www.mcgill.ca/meteo/channels/event/improving-damage-parameteriz
 ation-maxwell-elasto-brittle-rheology-better-resolve-orientation-ice-30309
 0
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