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    3D characterization of sand particle-to-particle contact and morphology

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    Date
    2016
    Author
    Druckrey, Andrew M.
    Alshibli, Khalid A.
    Al-Raoush, Riyadh I.
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    Abstract
    Particle morphology, orientation, and contact configuration play a significant role in the engineering properties of granular materials. Accurate three-dimensional (3D) characterization of these parameters for experiments has historically proven difficult, especially in the context of particle contact with small particle size. This paper describes a computer code that was developed to analyze 3D images of granular materials to measure particle lengths (size), volume, surface area, global centroid location and orientation; it also provides a method to calculate particle contact location and orientation. Measurements from the proposed code can define a state of the granular material's fabric that can be used as input for micro-mechanics based constitutive models and to validate numerical discrete element simulations. A fabric tensor and its evolution is calculated based on experimental contact normal vectors that were extracted from SMT imaging of an axisymmetric triaxial compression experiment on a natural silica sand known as F-35 sand.

    DOI/handle
    http://dx.doi.org/10.1016/j.compgeo.2015.12.014
    http://hdl.handle.net/10576/17995
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    • Civil & Architectural Engineering [‎281 ‎ items ]

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