BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:CONSTITUTIVE MODELLING OF COMPACTED CLAYS FOR APPLICATIONS IN NUCL
 EAR WASTE DISPOSAL.
DTSTART:20191125T110000
DTEND:20191125T114500
DTSTAMP:20261005T163209Z
UID:535dd32417db882330728bcf44158f5ad0f0f742724649b15a466679
CATEGORIES:Conferences - Seminars
DESCRIPTION:Giulia M. Ghiadistri\, Imperial College\, London\nCompacted hi
 ghly expansive unsaturated clays are envisaged to be employed as buffers f
 or the long-term storage of nuclear waste in deep geological repositories.
  The numerical modelling of such materials is challenging. A new constitut
 ive model for compacted clays is proposed. It accounts for the double-poro
 sity structure\, as it considers two levels of structure: the macro-struct
 ure and the micro-structure. The overall behaviour of the material is char
 acterised as an interaction of these two levels\, which are assumed to be 
 elastoplastic and not independent. The performance of the new model in the
  prediction of soil behaviour is assessed and it is shown that the double 
 structure is essential to capture the observed volumetric behaviour of com
 pacted clays.\nA numerical investigation of the behaviour upon wetting of 
 compacted clays is conducted at both the laboratory scale and the field sc
 ale. In the former case\, a swelling pressure test is studied in order to 
 verify that the new double structure model correctly reproduces the fundam
 ental features of the swelling behaviour. In the latter case\, a large sca
 le deep geological repository is reproduced in order to assess the predict
 ive capabilities of the model for the long-term state of the buffer.
LOCATION:GC B1 10 https://plan.epfl.ch/?room==GC%20B1%2010
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR