Micromechanics and rock failure process analysis

T. F. Wong, R. H.C. Wong, M. R. Jiao, Kam Tim Chau, C. A. Tang

Research output: Journal article publicationConference articleAcademic researchpeer-review

7 Citations (Scopus)

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 RFPA2Dcode, 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.
Original languageEnglish
Pages (from-to)39-44
Number of pages6
JournalKey Engineering Materials
Volume261-263
Issue numberI
Publication statusPublished - 27 Jul 2004
EventAdvances in Fracture and Failure Prevention: Proceedings of the Fifth International Conference on Fracture and Strength of Solids (FEOFS2003): Second International Conference on Physics and Chemistry of Fracture and Failure Prevention (2nd ICPCF) - Sendai, Japan
Duration: 20 Oct 200322 Oct 2003

Keywords

  • Failure process
  • Micromechanics
  • Numerical simulation
  • Yuen Long marble

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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