- Title
- Numerical investigation of the strength variability of rock using DEM
- Creator
- Nader, François; Thoeni, Klaus; Giacomini, Anna; Fityus, Stephen; Buzzi, Olivier
- Relation
- International Conference of the International Association for Computer Methods and Advances in Geomechanics. Proceedings of IACMAG: 16th International Conference of the International Association for Computer Methods and Advances in Geomechanics (Virtual 05-08 May, 2021) p. 895-902
- Relation
- ARC.DP160103140 http://purl.org/au-research/grants/arc/DP160103140
- Publisher Link
- http://dx.doi.org/10.1007/978-3-030-64514-4_97
- Publisher
- Springer
- Resource Type
- conference paper
- Date
- 2021
- Description
- Rock failure depends on a high number of variables, one of which is the distribution of defects. To estimate the effect of internal defects on strength variability, numerical simulations of mechanical tests under different loading configurations were run on samples where specific defect distributions were implemented. The Discrete Element Method (DEM) was used to generate three-dimensional rock samples using a bonded particle model. The spheres were joined using cohesive bonds with an interaction radius that allows non contacting spheres within this interaction radius to interact together. To simulate the defect distribution inside rock samples, an internal Weibull distribution of the bond strength was applied. Multiple standard laboratory tests generally used for material characterization were simulated. The Weibull distribution shape parameter of the strength distribution of the samples was then computed. The resulting shape parameters were used to establish a correlation between the shape parameter of the internal strength distribution and the macroscopic shape parameter of the strength distribution.
- Subject
- discrete element method; rock failure; Weibull distribution; internal defects; strength variability
- Identifier
- http://hdl.handle.net/1959.13/1434569
- Identifier
- uon:39459
- Identifier
- ISBN:9783030645137
- Language
- eng
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