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Suggested Method for Determining a Complete Set of Micro-Parameters Quantitatively in PFC2D  

Jong, Yong-Hun (서울대학교 에너지자원신기술연구소)
Lee, Chung-In (서울대학교 공과대학 지구환경시스템공학부)
Publication Information
Tunnel and Underground Space / v.16, no.4, 2006 , pp. 334-346 More about this Journal
Abstract
The discrete element code in 2-D, PFC2D, has been used as a tool to simulate various phenomena in rock mechanics and rock engineering. However, the code has an disadvantage that procedure to determine micro-parameters, namely properties of particles and contacts is repetitive and time-consuming. In this study, we analyzed the effect of micro-parameters(for generation of a contact-bonded model) on macro-properties(that were measured numerically by uniaxial compressive test). Based on the analysis, also, the time-saving and reliable method was suggested to determine a complete set of micro-parameters. In order to verify the suggested method, numerical specimens were generated in PFC2D for 10 different rock types at home and abroad. By the two trials for each specimen, in the result, the Young's modulus, Poisson's ratio and uniaxial compressive strength could be reproduced with being in relative error by about 5% to the values obtained by laboratory tests.
Keywords
Discrete element method; PFC2D; Young's modulus; Poisson's ratio; Uniaxial compressive strength;
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Times Cited By KSCI : 1  (Citation Analysis)
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