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

Fingerprint

Brazilian test
distinct element method
simulation
hard rock
softening
Rocks
crack propagation
tensile strength
compressive strength
crack
Compressive strength
code
Crack propagation
Tensile strength
particle
Cracks

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

Cite this

Nakashima, S., Taguchi, K., Moritoshi, A., Shimizu, N., & Funatsu, T. (2013). Loading conditions in the brazilian test simulation by DEM. In 47th US Rock Mechanics / Geomechanics Symposium 2013 (pp. 1833-1838). (47th US Rock Mechanics / Geomechanics Symposium 2013; Vol. 3).

Loading conditions in the brazilian test simulation by DEM. / Nakashima, S.; Taguchi, K.; Moritoshi, A.; Shimizu, N.; Funatsu, Takahiro.

47th US Rock Mechanics / Geomechanics Symposium 2013. 2013. p. 1833-1838 (47th US Rock Mechanics / Geomechanics Symposium 2013; Vol. 3).

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

Nakashima, S, Taguchi, K, Moritoshi, A, Shimizu, N & Funatsu, T 2013, Loading conditions in the brazilian test simulation by DEM. in 47th US Rock Mechanics / Geomechanics Symposium 2013. 47th US Rock Mechanics / Geomechanics Symposium 2013, vol. 3, pp. 1833-1838, 47th US Rock Mechanics / Geomechanics Symposium 2013, San Francisco, CA, United States, 6/23/13.
Nakashima S, Taguchi K, Moritoshi A, Shimizu N, Funatsu T. Loading conditions in the brazilian test simulation by DEM. In 47th US Rock Mechanics / Geomechanics Symposium 2013. 2013. p. 1833-1838. (47th US Rock Mechanics / Geomechanics Symposium 2013).
Nakashima, S. ; Taguchi, K. ; Moritoshi, A. ; Shimizu, N. ; Funatsu, Takahiro. / Loading conditions in the brazilian test simulation by DEM. 47th US Rock Mechanics / Geomechanics Symposium 2013. 2013. pp. 1833-1838 (47th US Rock Mechanics / Geomechanics Symposium 2013).
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