Particle scale features in shearing of glass ballotini

Danuta Lesniewska, David Muir Wood, Magdalena Pietrzak

    Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

    1 Citation (Scopus)


    Glass beads, when immersed in a liquid having the same refractive index, provide an idealised granular material which can be used both for full-field determination of displacements and hence strains and also, by viewing under polarised light, information concerning the internal stresses within the granular assembly. A simple test box has been used to subject this granular material to rotation of principal strain axes and to encourage the development of a shear mechanism. Results from image analysis are presented to show detail of shear strains and volumetric strains. The images obtained using polarised light have also been subjected to digital manipulation. The nature of the patterns that are revealed is subtle and appears to occur at a scale quite different from the strain patterns.
    Original languageEnglish
    Title of host publicationPowders and Grains 2009
    Subtitle of host publicationProceedings of the 6th International Conference on Micromechanics of Granular Media
    EditorsMasami Nakagawa, Stefan Luding
    Place of PublicationMelville
    PublisherAmerican Institute of Physics
    Number of pages4
    ISBN (Print)9780735406827
    Publication statusPublished - 2009
    EventPowders and Grains 2009 - Cecil H. & Ida Green Graduate and Professional Center on the campus of the Colorado School of Mines, Colorado, United States
    Duration: 13 Jul 200917 Jul 2009

    Publication series

    NameAIP conference proceedings
    PublisherAmerican Institute of Physics


    ConferencePowders and Grains 2009
    Abbreviated titleP&G 2009
    Country/TerritoryUnited States
    Internet address


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