Objective The theory of Critical State Soil Mechanics (CSSM) has become a paradigm within the framework of which elastoplastic soil constitutive models have been developed for the last 50 years. The present project will constructively challenge this paradigm from a missing fundamental perspective, namely the effect of soil fabric on the premises of CSSM.The current CSSM postulates that at critical state the stress and void ratios reach critical values with no reference to orientational aspects of the soil fabric, such as particles long axes, contact normals or void vectors statistical orientations. Thus, several soil mechanical response characteristics associated with fabric anisotropy cannot be adequately or even correctly described within the existing theory. The hypothesis that an evolving soil fabric tensor must also acquire a critical value for critical state to occur will be investigated by theoretical, numerical and experimental means, including continuum and discrete elements methods (DEM) of analysis for cohesive and cohesionless soils, X-ray Computed Tomography studies on real soil samples, and triaxial, biaxial and hollow cylinder experiments. The results of this investigation will be used to propose a new enhanced CSSM theory with fabric playing a distinct role. Particular tasks will include the derivation of an objective rate equation of evolution of the fabric tensor, the formulation of classes of constitutive models for sands and clays within the new fabric-enhanced framework of CSSM, and the Finite Elements analysis of selected geomechanics boundary value problems illustrating the effect of soil fabric by comparing the results with and without fabric effects.Successful completion of this project will change the way Soil Mechanics is taught at Universities and applied in advanced analysis of geomechanics problems, a field of increasing social impact in regards to hazard mitigations related to earthquakes and landslides. Fields of science natural sciencesearth and related environmental sciencesgeologyseismology Programme(s) FP7-IDEAS-ERC - Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Topic(s) ERC-AG-PE8 - ERC Advanced Grant - Products and process engineering Call for proposal ERC-2011-ADG_20110209 See other projects for this call Funding Scheme ERC-AG - ERC Advanced Grant Host institution ETHNICON METSOVION POLYTECHNION EU contribution € 1 703 000,00 Address HEROON POLYTECHNIOU 9 ZOGRAPHOU CAMPUS 157 80 ATHINA Greece See on map Region Αττική Aττική Κεντρικός Τομέας Αθηνών Activity type Higher or Secondary Education Establishments Principal investigator Ioannis Dafalias (Prof.) Administrative Contact Georgia Mertzelou (Ms.) Links Contact the organisation Opens in new window Website Opens in new window Total cost No data Beneficiaries (4) Sort alphabetically Sort by EU Contribution Expand all Collapse all ETHNICON METSOVION POLYTECHNION Greece EU contribution € 1 703 000,00 Address HEROON POLYTECHNIOU 9 ZOGRAPHOU CAMPUS 157 80 ATHINA See on map Region Αττική Aττική Κεντρικός Τομέας Αθηνών Activity type Higher or Secondary Education Establishments Principal investigator Ioannis Dafalias (Prof.) Administrative Contact Georgia Mertzelou (Ms.) Links Contact the organisation Opens in new window Website Opens in new window Total cost No data UNIVERSITE JOSEPH FOURIER GRENOBLE 1 Participation ended France EU contribution No data Address Avenue Centrale, Domaine Universitaire 621 38041 GRENOBLE See on map Activity type Higher or Secondary Education Establishments Administrative Contact Yann Le Roux Links Contact the organisation Opens in new window Website Opens in new window Total cost No data UGA-Université Grenoble Alpes France EU contribution € 143 000,00 Address 621, AVENUE CENTRALE 38401 SAINT MARTIN D'HERES See on map Region RUP FR — Régions Ultrapériphériques Françaises Guadeloupe Guadeloupe Activity type Higher or Secondary Education Establishments Administrative Contact Aurelie Diringer-Dagorne (Ms.) Links Contact the organisation Opens in new window Website Opens in new window Total cost No data CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS France EU contribution € 78 000,00 Address RUE MICHEL ANGE 3 75794 Paris See on map Region Ile-de-France Ile-de-France Paris Activity type Research Organisations Administrative Contact Guillaume Rochet (Dr.) Links Contact the organisation Opens in new window Website Opens in new window Total cost No data
