A coupled discrete-element model of fluid-saturated rock and the results of studying of the impact of a fluid on the shear strength of a rock under combined compression and shear

Andrey V. Dimaki, Evgeny V. Shilko, Sergey G. Psakhie

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Within a discrete-element model of a porous permeable elastic-plastic rock, filled with a fluid, we have studied the shear strength of a fractured interface zone (a shear band) between blocks of a geological medium subject to compression and shear. Under these conditions, a fluid pore pressure is controlled by interplay of dilation of the elastic-plastic shear band and fluid transport between the blocks and the interface. We have found that the shear strength is a unique function of a combination of parameters, which includes viscosity of a fluid, permeability of the medium, shear rate and a characteristic size of the system. Based on the simulation results we have constructed the generalized binomial dependence of the shear strength of samples on the obtained combination of parameters.

    Original languageEnglish
    Title of host publicationProceedings of the 7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017
    EditorsManolis Papadrakakis, Eugenio Onate, Bernhard A. Schrefler
    PublisherInternational Center for Numerical Methods in Engineering
    Pages1193-1202
    Number of pages10
    Volume2017-January
    ISBN (Electronic)9788494690921
    Publication statusPublished - 1 Jan 2017
    Event7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017 - Rhodes Islad, Greece
    Duration: 12 Jun 201714 Jun 2017

    Conference

    Conference7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017
    CountryGreece
    CityRhodes Islad
    Period12.6.1714.6.17

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    Keywords

    • Compression
    • Discrete element method
    • Fluid-saturated rock
    • Plasticity
    • Porosity
    • Shear
    • Strength

    ASJC Scopus subject areas

    • Applied Mathematics
    • Engineering(all)
    • Computational Mathematics

    Cite this

    Dimaki, A. V., Shilko, E. V., & Psakhie, S. G. (2017). A coupled discrete-element model of fluid-saturated rock and the results of studying of the impact of a fluid on the shear strength of a rock under combined compression and shear. In M. Papadrakakis, E. Onate, & B. A. Schrefler (Eds.), Proceedings of the 7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017 (Vol. 2017-January, pp. 1193-1202). International Center for Numerical Methods in Engineering.