Crack closure, initiation and damage stresses of Montney shale
Qiang Chen, Ron Wong
In the proceedings of: GeoEdmonton 2018: 71st Canadian Geotechnical Conference; 13th joint with IAH-CNCSession: Rock Mechanics and Engineering Geology I
ABSTRACT: The uniaxial and triaxial compression tests have been conducted on 38 mm diameter core plugs to characterize the mechanical properties of the Montney strata. The crack closure, crack initiation, crack damage and peak stresses are determined based on the test results. The axial strain response method (ASRM), the lateral strain response method (LSRM), the volumetric strain method (VSM) and the crack volumetric strain method (CVSM) are used to estimate these 4 stress thresholds. The results show that all methods can give acceptable values. ASRM and LSRM depend heavily on the origin of the stress-strain curve. modulusobtained from the test results.
RÉSUMÉ: Les essais de compression uniaxiale et triaxiale ont été effectués sur des bouchons de 38 mm de diamètre afin de caractériser les propriétés mécaniques des strates de Montney. La fermeture, l'amorçage et le dommage des fissures et les pics de contrainte sont déterminés en fonction des résultats des essais. Les méthodes de réponse en déformation axiale (ASRM)et latérale (LSRM), et les méthodes de déformation volumétrique (VSM) et volumétrique de fissure (CVSM) sont utilisées pour estimer ces 4 seuils de contrainte. Les résultats montrent que toutes les méthodes peuvent donner des valeurs acceptables. L'ASRM et le LSRM dépendent fortement de l'origine de la courbe contrainte-déformation. De plus, le module de Young, le coefficient de Poisson, la cohésion et l'angle de frottement sont obtenus à partir des résultats des essais.
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Cite this article:
Qiang Chen; Ron Wong (2018) Crack closure, initiation and damage stresses of Montney shale in GEO2018. Ottawa, Ontario: Canadian Geotechnical Society.
@article{geo2018Paper280,
author = Qiang Chen; Ron Wong,
title = Crack closure, initiation and damage stresses of Montney shale,
year = 2018
}
title = Crack closure, initiation and damage stresses of Montney shale,
year = 2018
}