DEM simulation of Brazilian tensile failure of hard rock in consideration of loading condition

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

Research output: Contribution to conferencePaper

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 models and clump particle model, 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 been pointed out, 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, differently from the cracks observed in the experimental data. Attributing the above problem to the loading configuration, some two-dimensional PFC simulations were conducted in Brazilian tests under several loading conditions in this study. 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
Pages271-277
Number of pages7
Publication statusPublished - Jan 1 2012
Event7th Asian Rock Mechanics Symposium, ARMS 2012 - Seoul, Korea, Republic of
Duration: Oct 15 2012Oct 19 2012

Other

Other7th Asian Rock Mechanics Symposium, ARMS 2012
CountryKorea, Republic of
CitySeoul
Period10/15/1210/19/12

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All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

Nakashima, S., Taguchi, K., Funatsu, T., & Shimizu, N. (2012). DEM simulation of Brazilian tensile failure of hard rock in consideration of loading condition. 271-277. Paper presented at 7th Asian Rock Mechanics Symposium, ARMS 2012, Seoul, Korea, Republic of.