Strain path controlled shear tests on an analogue granular material

E. Ibraim, D. Muir Wood, J. Lanier, G. Viggiani

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    A series of strain controlled tests have been performed on a two-dimensional analogue granular material, composed of three different sizes of rods, in a special laboratory apparatus which permits full control of plane deformations, including rotation of principal axes. These tests have been designed and used to explore certain constitutive conjectures concerning the mechanical behaviour of granular materials. The results, within the accuracy of the apparatus, show that irrespective of the initial stress history of the material, proportional strain paths (if continued for long enough) lead to proportional stress states (asymptotic states). The asymptotic states appear to be independent of the fixed imposed rotation of principal strain axes and at these states coaxiality between the principal stress direction and the principal incremental strain direction seems to be reached. A stress dilatancy relationship between the imposed dilatancy and the corresponding asymptotic stress ratio has been identified.
    Original languageEnglish
    Pages (from-to)545-559
    Number of pages15
    JournalGéotechnique
    Volume60
    Issue number7
    DOIs
    Publication statusPublished - 1 Jul 2010

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    Granular materials
    shear test
    dilatancy
    material
    history
    test

    Keywords

    • Constitutive relations
    • Laboratory tests
    • Stress path

    Cite this

    Ibraim, E. ; Muir Wood, D. ; Lanier, J. ; Viggiani, G. / Strain path controlled shear tests on an analogue granular material. In: Géotechnique. 2010 ; Vol. 60, No. 7. pp. 545-559.
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    Strain path controlled shear tests on an analogue granular material. / Ibraim, E.; Muir Wood, D.; Lanier, J.; Viggiani, G.

    In: Géotechnique, Vol. 60, No. 7, 01.07.2010, p. 545-559.

    Research output: Contribution to journalArticle

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    AU - Ibraim, E.

    AU - Muir Wood, D.

    AU - Lanier, J.

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