Modelling rate effects in undrained loading of sands

Nathalie Boukpeti, Z. Mroz, A. Drescher

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    The present technical note extends the previous work by the authors concerned with formulation of a constitutive model of elastoplastic response of sands (Superior sand model) and its application to the analyses of static liquefaction and instability states in triaxial compression and extension occurring in the undrained deformation of saturated granular materials. To account for time-dependent behavior and strain rate effects, an elastic, viscoplastic extension of the model to triaxial compression is proposed. The constitutive equations derived are used to predict the model response in different loading histories. In particular, strain rate and stress rate effects and undrained creep deformation for specified stress components are discussed in detail. Comparison of model predictions with available experimental data also is provided.Key words: saturated sand, constitutive model, elastic–viscoplastic behavior.
    Original languageEnglish
    Pages (from-to)342-350
    JournalCanadian Geotechnical Journal
    Volume41
    Issue number2
    DOIs
    Publication statusPublished - 2004

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