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Proceedings Paper

Virtual experiments on complex materials
Author(s): Gary W. Delaney; Shio Inagaki; T. Di Matteo; Tomaso Aste
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Paper Abstract

We investigate complex materials by performing "Virtual Experiments" starting from three-dimensional images of grain packs obtained by X-ray CT imaging [1]. We apply this technique to granular materials by reconstructing a numerical samples of ideal spherical beads with desired (and tunable) properties. The resulting "virtual packing" has a structure that is almost identical to the experimental one. However, from such a digital duplicate we can calculate several static and dynamical properties (e.g. the force network, avalanche precursors, stress paths, stability, fragility, etc.) which are otherwise not directly accessible from experiments. Our simulation code handles three-dimensional spherical grains and it takes into account repulsive elastic normal forces, frictional tangential forces, viscous damping and gravity. The system can be both simulated within a vessel or with periodic boundary conditions.

Paper Details

Date Published: 5 January 2008
PDF: 8 pages
Proc. SPIE 6802, Complex Systems II, 68020G (5 January 2008); doi: 10.1117/12.759412
Show Author Affiliations
Gary W. Delaney, The Australian National Univ. (Australia)
Shio Inagaki, The Australian National Univ. (Australia)
T. Di Matteo, The Australian National Univ. (Australia)
Tomaso Aste, The Australian National Univ. (Australia)


Published in SPIE Proceedings Vol. 6802:
Complex Systems II
Derek Abbott; Tomaso Aste; Murray Batchelor; Robert Dewar; Tiziana Di Matteo; Tony Guttmann, Editor(s)

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