Continuum modelling of dynamic rock fracture under triaxial confinement

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    Abstract

    This paper deals with numerical modelling of compressive fracture behavior of granite rock under high strain rate and wide range of confining pressure. For this end, a constitutive model based on damage mechanics and viscoplasticity is formulated and implemented in explicit dynamics FEM. Rock heterogeneity is characterized with the Weibull distribution. In the numerical examples, triaxial compression tests on Kuru granite at the strain rate of 600 1/s up to 225 MPa of confining pressure were simulated. Simulations show that the model captures the correct experimental failure modes, including the transition from single-to-multiple fragmentation, as well as the dynamic compressive strengths at different confining pressures.
    Original languageEnglish
    Title of host publication14th International Conference on Fracture, Proceedings of ICF 14
    Subtitle of host publicationRhodes, Greece, June 18-23, 2017
    Number of pages2
    Publication statusPublished - 2017
    Publication typeA4 Article in conference proceedings
    EventInternational Conference on Fracture -
    Duration: 25 Aug 2017 → …

    Conference

    ConferenceInternational Conference on Fracture
    Period25/08/17 → …

    Publication forum classification

    • No publication forum level

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