Particle crushing and deformation behaviour

D. Muir Wood, M. Kikumoto, A. Russell

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

    10 Citations (Scopus)

    Abstract

    Particle crushing occurs in granular materials in various engineering applications. The effect of particle crushing is to broaden the grading of particle sizes and lower the critical state line and other characteristics of the volumetric response in the compression plane. An existing constitutive model, Severn-Trent sand, in which the critical state line plays a central role, has been extended to include the effects of particle crushing. Severn-Trent sand is a distortional hardening Mohr-Coulomb model described within a kinematic hardening, bounding surface framework. Strength is a variable quantity, dependent on the current value of state parameter which varies with shearing-induced dilatancy and changes in stress level. Particle crushing lowers the critical state line and hence tends to produce increase in state parameter and hence a looser response even without any change in volumetric packing. Dense material having crushed may liquefy and lose strength thus leading to increased run-out of debris flows.

    Original languageEnglish
    Title of host publicationPrediction and simulation methods for geohazard mitigation
    EditorsFusao Oka, Akira Murakami, Sayuri Kimoto
    Place of PublicationBoca Raton, Florida
    PublisherCRC Press-Taylor & Francis Group
    Pages263-268
    Number of pages6
    ISBN (Electronic)9780203871041
    ISBN (Print)9780415804820
    Publication statusPublished - 2009
    EventInternational Symposium on Prediction and Simulation Methods for Mitigation of Geohazard - Kyoto, Japan
    Duration: 25 May 200928 May 2009

    Conference

    ConferenceInternational Symposium on Prediction and Simulation Methods for Mitigation of Geohazard
    CountryJapan
    CityKyoto
    Period25/05/0928/05/09

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