Stationary damage modelling of poroelastic contact

Selvadurai, A. P. S.

doi:10.1016/j.ijsolstr.2003.08.023

Cited by 74 publications

(40 citation statements)

References 85 publications

(89 reference statements)

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“…The thin gel results for microindentation (Table 1) seem to be particularly afflicted with this, since comparison of the viscoelastic analysis-which assumes bulk half-space behavior-and the poroelastic analysis for a subset of the same gels (Table 2) hours. Recently, a suggestion has been made [21], based on previous analyses of the poroelastic spherical indentation problem [31,32] that a "master curve" approach could 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 The original suggestion and earlier analyses [21,31,32] were all based on step-load creep experiments, but there is no physical reason that a similar approach could not be adopted for displacement-controlled relaxation tests under more typical experimental conditions. The rapid identification of permeability from indentation tests would allow for "permeability mapping" of biological tissues or inhomogeneous materials, similar in concept to the "modulus map" approach already being used for elastic characterization of inhomogeneous materials and tissues [33].…”

Section: Discussionmentioning

confidence: 99%

Viscoelastic and poroelastic mechanical characterization of hydrated gels

et al. 2009

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Measurement of the mechanical behavior of hydrated gels is challenging due to a relatively small elastic modulus and dominant time-dependence compared with traditional engineering materials. Here polyacrylamide gel materials are examined using different techniques (indentation, unconfined compression, dynamic mechanical analysis) at different length-scales and considering both viscoelastic and poroelastic mechanical frameworks. Elastic modulus values were similar for nanoindentation and microindentation, but both indentation techniques overestimated elastic modulus values compared with homogeneous loading techniques. Hydraulic and intrinsic permeability values from microindentation tests, deconvoluted using a poroelastic finite element model, were consistent with literature values for gels of the same composition. Although elastic modulus values were comparable for viscoelastic and poroelastic analyses, timedependent behavior was length-scale dependent, supporting the use of a poroelastic, instead of a viscoelastic, framework for future studies of gel mechanical behavior under indentation.

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Section: Discussionmentioning

confidence: 99%

Viscoelastic and poroelastic mechanical characterization of hydrated gels

et al. 2009

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“…Other studies of permeability alteration due to stress states are given by Zoback and Byerlee (1975), David and Darot (1989), David et al (1994), Shiping et al (1994), Kiyama et al (1996), and Selvadurai and Głowacki (2008). Applications of damage mechanics-based interpretations of permeability evolution are given by Mahyari and Selvadurai (1998), Selvadurai and Shirazi (2004) and an extensive review of the influence of damage on poroelastic behaviour is given by Selvadurai (2004b). The basic philosophy in transient testing is that a fluid volume in contact with the saturated porous medium can be pressurized and the pressure will decay as the fluid migrates from the cavity to the porous domain.…”

Section: Introductionmentioning

confidence: 99%

Isothermal Permeability of the Argillaceous Cobourg Limestone

Selvadurai¹,

Najari²

2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-The paper presents the results of an experimental evaluation of the permeability of the heterogeneous argillaceous limestone from the Cobourg formation located in southern Ontario, Canada. The low permeability of the limestone necessitated the development of experimental techniques for effectively measuring the permeability of the rock. In particular, we examine the results of pressurization of a fluid-filled co-axial cylindrical cavity of finite length cored into a 150 mm diameter cylinder of the Cobourg Limestone. The orientation of the cavity is either normal to or along the nominal stratifications identified by the argillaceous partings separating the quartzitic phases. Both steady state and transient tests are used to estimate the permeability of the Cobourg Limestone. The paper also investigates the influence of a nominal axial load on the permeability of the rock.

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“…This sequence has the lowest hydraulic conductivity, and along with other attributes is considered to be a suitable formation for siting a DGR. The composition of the Lindsay Limestone is quite distinct from other limestones that are highly porous due to their vuggy nature that can result from cracks, fissures and stress-induced damage zones (Selvadurai 2004). This paper deals with the experimental determination of the permeability characteristics of the Lindsay Limestone using results of axial flow hydraulic pulse tests conducted on cylindrical samples with a diameter 100 mm.…”

Section: Introductionmentioning

confidence: 99%

Axial flow hydraulic pulse testing of an argillaceous limestone

2011

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Lindsay Limestone is an argillaceous limestone encountered in Southern Ontario, Canada. The Lindsay formation is regarded as a suitable geologic medium for the construction of a Deep Geologic Repository for storing low to intermediate level nuclear waste. The Lindsay Limestone is a nodular argillaceous rock with very low permeability, requiring the use of hydraulic pulse tests for the measurement of its permeability characteristics. The paper describes the triaxial testing facility, the theoretical basis for the test and the procedures used to analyze the experimental results for estimating the permeability of the Lindsay Limestone. The results are compared with the data available in the literature.

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Stationary damage modelling of poroelastic contact

Cited by 74 publications

References 85 publications

Viscoelastic and poroelastic mechanical characterization of hydrated gels

Viscoelastic and poroelastic mechanical characterization of hydrated gels

Isothermal Permeability of the Argillaceous Cobourg Limestone

Axial flow hydraulic pulse testing of an argillaceous limestone

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