Numerical modelling of coupled flow and deformation in fractured rock specimens

M. Bai, F. Meng, Derek Elsworth, Y. Abousleiman, J. C. Roegiers

Research output: Contribution to journalArticle

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Abstract

A dual-porosity poroelastic model is extended to represent behaviour in cylindrical co-ordinates for the evaluation of flow-deformation effects in cylindrical laboratory samples incorporating a central wellbore or non-repeating axisymmetric injection on the periphery. Nine-node quadratic elements are used to represent mechanical deformation, while eight-node linear elements are used to interpolate the pressure fields, which offers significant advantages over the behaviour of other non-conforming elements. The model presented is validated against simplified analytical results, and extended to describe the behaviour of homogeneous and heterogeneous laboratory specimens subjected to controlled triaxial state of stress and injection tests. Apparent from the results is the significant influence of stress-deformation effects over system behaviour.

Original languageEnglish (US)
Pages (from-to)141-160
Number of pages20
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Volume23
Issue number2
DOIs
StatePublished - Jan 1 1999

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All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Materials Science(all)
  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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