Distinct element analysis for Class II behavior of rocks under uniaxial compression

Hiroyuki Shimizu; Tomofumi Koyama; Tsuyoshi Ishida; Masakazu Chijimatsu; Tomoo Fujita; Shigeo Nakama

doi:10.1016/j.ijrmms.2009.09.012

Distinct element analysis for Class II behavior of rocks under uniaxial compression

Hiroyuki Shimizu, Tomofumi Koyama, Tsuyoshi Ishida, Masakazu Chijimatsu, Tomoo Fujita, Shigeo Nakama

Innovative Energy Research Center

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

In this study, the radial strain control method for uniaxial compression tests was introduced in the distinct element method (DEM) codes and the Class II behavior of rocks was simulated. The microscopic parameters used in the DEM models were determined based on laboratory uniaxial compression tests and Brazilian tests carried at Äspö Hard Rock Laboratory, Sweden. The numerical simulation results show good agreement with the complete stress-strain curves for Class II obtained from the laboratory experiments. These results suggest that the DEM can reproduce the Class II behavior of the rock successfully. The mechanism of the Class II behavior was also discussed in detail from the microscopic point of view. The loading condition and microscopic structure of rocks will play an important role for the Class II behavior.

Original language	English
Pages (from-to)	323-333
Number of pages	11
Journal	International Journal of Rock Mechanics and Mining Sciences
Volume	47
Issue number	2
DOIs	https://doi.org/10.1016/j.ijrmms.2009.09.012
Publication status	Published - 2010 Feb

Keywords

Class II behavior
Distinct element method (DEM)
Particle mechanics approaches
Radial strain control
Uniaxial compression test

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology

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abstract = "In this study, the radial strain control method for uniaxial compression tests was introduced in the distinct element method (DEM) codes and the Class II behavior of rocks was simulated. The microscopic parameters used in the DEM models were determined based on laboratory uniaxial compression tests and Brazilian tests carried at {\"A}sp{\"o} Hard Rock Laboratory, Sweden. The numerical simulation results show good agreement with the complete stress-strain curves for Class II obtained from the laboratory experiments. These results suggest that the DEM can reproduce the Class II behavior of the rock successfully. The mechanism of the Class II behavior was also discussed in detail from the microscopic point of view. The loading condition and microscopic structure of rocks will play an important role for the Class II behavior.",

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AU - Shimizu, Hiroyuki

AU - Koyama, Tomofumi

AU - Ishida, Tsuyoshi

AU - Chijimatsu, Masakazu

AU - Fujita, Tomoo

AU - Nakama, Shigeo

PY - 2010/2

Y1 - 2010/2

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KW - Distinct element method (DEM)

KW - Particle mechanics approaches

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Distinct element analysis for Class II behavior of rocks under uniaxial compression

Abstract

Keywords

ASJC Scopus subject areas

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