TY - GEN
T1 - Loading conditions in the brazilian test simulation by DEM
AU - Nakashima, S.
AU - Taguchi, K.
AU - Moritoshi, A.
AU - Shimizu, N.
AU - Funatsu, T.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:84892893950
SN - 9781629931180
T3 - 47th US Rock Mechanics / Geomechanics Symposium 2013
SP - 1833
EP - 1838
BT - 47th US Rock Mechanics / Geomechanics Symposium 2013
T2 - 47th US Rock Mechanics / Geomechanics Symposium 2013
Y2 - 23 June 2013 through 26 June 2013
ER -