An experimentally based `bubble' model for clay

A. Al-Tabbaa, D. Muir Wood

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    155 Citations (Scopus)


    The cam clay model has been widely used for numerical modelling of normal consolidated and lightly overconsolidated clays but it is deficient in its representation of soil behaviour inside the yield locus. In order to extend the cam clay model an inner kinematically hardening bubble is added in order to match experimentally observed hysteretic response. The new model is found to be quite successful in reproducing patterns of response of speswhite kaolin observed in slow cyclic oedometer and triaxial tests. It requires only two parameters in addition to the parameters of the soil model, and degenerates to the cam clay model for monotonic loading.
    Original languageEnglish
    Title of host publicationNumerical models in geomechanics
    Subtitle of host publicationNUMOG III
    EditorsS. Pietruszczak, G. N. Pande
    PublisherElsevier Applied Science Publishers
    Number of pages9
    ISBN (Print)1851664254
    Publication statusPublished - 1989
    EventInternational Symposium on Numerical Models in Geomechanics (3rd: 1989). - Niagara Falls, Canada
    Duration: 8 May 198911 May 1989


    ConferenceInternational Symposium on Numerical Models in Geomechanics (3rd: 1989).
    CityNiagara Falls


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