Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34855
Title: Micromechanics and rock failure process analysis
Authors: Wong, TF
Wong, RHC
Jiao, MR
Chau, KT 
Tang, CA
Keywords: Numerical simulation
Micromechanics
Failure process
Yuen Long marble
Issue Date: 2004
Publisher: Trans Tech Publications
Source: Key engineering materials, 2004, v. 261-263, p. 39-44 How to cite?
Journal: Key engineering materials
Abstract: A major challenge in rock mechanics has been the realistic modeling that can reveal the progressive accumulation of damage and shear localization in a brittle rock under compression. The Rock Failure Process Analysis code (RFPA2D) is an efficient tool and realistic model to simulate such complexities. A key assumption of the code is that the heterogeneity of elastic moduli and failure strength are characterized by the Weibull distribution with two parameters (m and σ0 ). However, these two parameters do automatically not relate to the microstructural parameters, such as grain size and microcrack statistics. Therefore, the purpose of this paper is to elucidate the micromechanical basis of these Weibull parameters, specifically how they depend on microstructural attributes such as grain size and crack statistics. Secondly, a methodology was developed to quantitatively determine the relevant micromechanical parameters for input into the RFPA2D code. Finally, the methodology was implemented by quantifying the microcrack geometry and statistics of real rock and simulating its uniaxial compression and progressive failure behavior. The simulated result agrees well with the experimental study.
Description: Fifth International Conference on Fracture and Strength of Solids (FEOFS2003) and the Second International Conference on Physics & Chemistry of Fracture and Failure Prevention (2nd ICPCF), October 20-22, 2003, Tohoku University, Sendai, Japan
URI: http://hdl.handle.net/10397/34855
ISSN: 1662-9795
DOI: 10.4028/www.scientific.net/KEM.261-263.39
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