Numerical modelling of coupled flow and deformation in fractured rock specimens

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

doi:10.1002/(SICI)1096-9853(199902)23:2<141::AID-NAG962>3.0.CO;2-G

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 journal › Article › peer-review

59 Scopus citations

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 language	English (US)
Pages (from-to)	141-160
Number of pages	20
Journal	International Journal for Numerical and Analytical Methods in Geomechanics
Volume	23
Issue number	2
DOIs	https://doi.org/10.1002/(SICI)1096-9853(199902)23:2<141::AID-NAG962>3.0.CO;2-G
State	Published - Jan 1 1999

All Science Journal Classification (ASJC) codes

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

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10.1002/(SICI)1096-9853(199902)23:2<141::AID-NAG962>3.0.CO;2-G

Cite this

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Numerical modelling of coupled flow and deformation in fractured rock specimens

Abstract

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