Loading conditions in the brazilian test simulation by DEM

S. Nakashima, K. Taguchi, A. Moritoshi, N. Shimizu, Takahiro Funatsu

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

    7 Citations (Scopus)

    Abstract

    The Particle Flow Code (PFC), a simulation code based on the distinct element method (DEM), is an effective numerical tool for simulating the failure process of hard rock. By introducing contact- and parallel-bond and clump logic, the code has become better able to express the ratio of uniaxial compressive strength to tensile strength of hard rock. On the other hand, a problem has arisen, namely, that PFC simulations with the clumped particle model cannot reproduce rapid strain-softening behavior in Brazilian tensile tests. In addition, cracks propagate too widely in the specimens; this differs from the experimental facts. Attributing the above problems to the loading configuration, some two-dimensional PFC simulations of Brazilian tests were conducted in this study under several loading conditions. Strip loading (line loading in two dimensions) and line loading (point loading in two dimensions) were taken into consideration. From the simulation results, point loading was found to be effective for expressing rapid strain-softening behavior and crack propagation in Brazilian tensile tests.

    Original languageEnglish
    Title of host publication47th US Rock Mechanics / Geomechanics Symposium 2013
    Pages1833-1838
    Number of pages6
    Publication statusPublished - Dec 1 2013
    Event47th US Rock Mechanics / Geomechanics Symposium 2013 - San Francisco, CA, United States
    Duration: Jun 23 2013Jun 26 2013

    Publication series

    Name47th US Rock Mechanics / Geomechanics Symposium 2013
    Volume3

    Other

    Other47th US Rock Mechanics / Geomechanics Symposium 2013
    CountryUnited States
    CitySan Francisco, CA
    Period6/23/136/26/13

    All Science Journal Classification (ASJC) codes

    • Geotechnical Engineering and Engineering Geology

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