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Influence of particle shape on sheared dense granular media

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Abstract

We study by means of molecular dynamics simulations of periodic shear cells, the influence of particle shape on the global mechanical behavior of dense granular media. At large shear deformation samples with elongated particles, independent of their initial orientation, reach the same stationary value for both shear force and void ratio. At the micro-mechanical level the stress, the fabric and the inertia tensors of the particles are used to study the evolution of the media. In the case of isotropic particles the direction of the principal axis of the fabric tensor is aligned with the one of the principal stress, while for elongated particles the fabric orientation is strongly dependent on the orientation of the particles. The shear band width is shown to depend on the particle shape due to the tendency of elongated particles to preferential orientations and less rotation.

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Authors and Affiliations

  1. Institute for Computer Applications 1, Pfaffenwaldring 27, 70569, Stuttgart, Germany

    A. A. Peña, R. García-Rojo & H. J. Herrmann

  2. Institut für Baustoffe, ETH-Hönggerberg, Schafmattstr 6, 8093, Zürich, Switzerland

    H. J. Herrmann

  3. Departamento de Fisica, Universidade Federal do Ceará, Campus do Pici, 60451-970, Fortaleza, CE, Brazil

    H. J. Herrmann

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  1. A. A. Peña
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  2. R. García-Rojo
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  3. H. J. Herrmann
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Correspondence to A. A. Peña.

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Peña, A.A., García-Rojo, R. & Herrmann, H.J. Influence of particle shape on sheared dense granular media. Granular Matter 9, 279–291 (2007). https://doi.org/10.1007/s10035-007-0038-2

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  • DOI: https://doi.org/10.1007/s10035-007-0038-2

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