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SUMMARY:ENAC Seminar Series by Dr. Eleni Stavropoulou
DTSTART:20230516T101500
DTEND:20230516T111500
DTSTAMP:20260916T201419Z
UID:0a3ae2061ebe6e1976be2d807badecdd264198dd68f2422748cd48fa
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Eleni Stavropoulou\n10:15-11:15  -  Dr. Eleni Stavropou
 lou\nResearch Associate\, EPFL \n\nCan we continue to pretend that geomat
 erials are homogeneous? Micro-scale observation\nas a tool for understandi
 ng\n\nGeo-engineers are facing increasing challenges in characterising the
  behaviour of\ncomplex geo-systems related to deep-underground or deep-sea
  applications. Discontinuities\, coupled solid/fluid processes\, large an
 d time-dependent deformation are only a few to be named\, that traditional
  geotechnics encounter significant difficulties to characterise. While nat
 ural geomaterials are at their great extent largely heterogeneous and anis
 otropic\, most experimental methods and constitutive models are designed t
 o describe an idealised homogeneous behaviour. This is partly related to t
 he temporal and spatial scales of observation that are key for understandi
 ng and successfully modelling the occurring multi-physical phenomena. In t
 his talk\, we will discuss the importance of micro-scale for understanding
  and successfully modelling the macroscopic processes in natural and engin
 eered geosystems. Different geotechnical applications involving different 
 geomaterials and their interfaces\, under different types of loading and b
 oundary conditions will be presented. From piles to geological reservoirs\
 , the viability of geotechnical systems requires deep understanding of the
  localised processes that take place at small scales. Micro-structural het
 erogeneity\, soil/fluid interaction\, as well as pre-existing and/or creat
 ed discontinuities will be discussed. In addition to bulk characterisation
 \, particular emphasis will be given on the impact of the different geomat
 erial interfaces on the long-term behaviour of such geostructures. To bett
 er understand and visualise the contribution of micro-structure to the res
 ponse of the studied materials and their interfaces\, systematic use of im
 aging techniques (post-mortem and in-situ) is applied\, such as x-ray and 
 neutron tomography.\n\nShort bio:\n\nDr. Eleni Stavropoulou is leading the
  Carbon Capture and Storage (CCS) activities of the Laboratory of Soil Mec
 hanics (LMS) in EPFL. She received her PhD in Geomechanics in 2017 from th
 e University Grenoble Alpes (France). Her research focuses on the characte
 risation of natural geomaterials in the context of contemporary engineerin
 g applications\, such as radioactive waste storage (Andra\, PhD thesis)\, 
 design of piles for offshore wind turbines (Solcyp+\, 2018)\, dam stabilit
 y (EDF\, 2019) and geological CO2 storage (SwissTopo\, DemoUpStorage\, 202
 0+). She has been particularly interested in understanding the impact of m
 icro-scale processes on the macroscopic response\, by systematically using
  advanced imaging techniques. In 2021\, Dr. Stavropoulou obtained an SNSF 
 Spark grant to develop a technique for 3D real-time monitoting of caprock 
 response to CO2 injection with x-ray tomography\, visualising for the firs
 t time the localised multiphysical phenomena that take place in the materi
 al.\n 
LOCATION:GC B1 10 https://plan.epfl.ch/?room==GC%20B1%2010
STATUS:CONFIRMED
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