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Polygonal Grain-Based Distinct Element Modelling of Mechanical Characteristics and Transverse Isotropy of Rock
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  • Journal title : Tunnel and Underground Space
  • Volume 26, Issue 3,  2016, pp.235-252
  • Publisher : Korean Society for Rock Mechanics
  • DOI : 10.7474/TUS.2016.26.3.235
 Title & Authors
Polygonal Grain-Based Distinct Element Modelling of Mechanical Characteristics and Transverse Isotropy of Rock
Park, Jung-Wook; Park, Chan; Ryu, Dongwoo; Choi, Byung-Hee; Park, Eui-Seob;
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 Abstract
This study presents a methodology to reproduce the mechanical behavior of isotropic or transversely isotropic rock using the polygonal grain-based distinct element model. A numerical technique to monitor the evolution of micro-cracks during the simulation was developed in the present study, which enabled us to examine the contribution of tensile cracking and shear cracking to the progressive process of the failure. The numerical results demonstrated good agreement with general observations from rock specimens in terms of the behavior and the evolution of micro-cracks, suggesting the capability of the model to represent the mechanical behavior of rock. We also carried out a parametric study as a fundamental work to examine the relationships between the microscopic properties of the constituents and the macroscopic behavior of the model. Depending on the micro-properties, the model exhibited a variety of responses to the external load in terms of the strength and deformation characteristics. In addition, a numerical technique to reproduce the transversely isotropic rock was suggested and applied to Asan gneiss from Korea. The behavior of the numerical model was in good agreement with the results obtained in the laboratory-scale experiments of the rock.
 Keywords
Grain-based model (GBM);Distinct element method;Polygonal grain;Micro-parameter;Transverse isotropy;
 Language
Korean
 Cited by
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