Limits† of† isotropic† plastic† deformation† of† Bangkok† clay†
P. Evesque: Lab MSSM, UMR 8579 CNRS, Ecole Centrale Paris, 92295 Ch‚tenay-Malabry, France , firstname.lastname@example.org
Abstract:† A† model† assuming† incremental† plastic† isotropic† response† has† been† recently proposed† to† model† the deformation† of† isotropic† packing† of† grains,† in† the† small-strain† range.† It† is† used† here† on† over-consolidated remould† clay,† to† interpret† the† small-strain† range† behaviour† obtained† in† [1,2]† on Bangkok† clay.† The data published in [1,2] at constant volume are also used here to measure the size of the domain of validity in the (q/(Míp),p/po) plane, where po is the over-consolidation isotropic pressure, p=(s1+ s2+ s3)/3 is the mean stress and q the deviatoric stress, q= s1- s3 . So, it is shown that the model works also for clay. This enlarges the application domain of model [3,4] to soft clay with OCR larger than 1.2 to 1.5.
Pacs # : 45.70.-n ; 62.20.Fe ; 83.80.Fg, 83.80.Hj
poudres & grains 14 (1), 4-7 (janvier 2004)