Failure data from compression and extension testing of Dunnville sandstone and Webatuck dolomite were analyzed using three different criteria: Mohr-Coulomb, Hoek-Brown, and Paul-Mohr-Coulomb. An emphasis was placed on the details of the failure criteria under tensile-compressive loading conditions, which was possible due to a dog-bone specimen geometry. Tension cut-offs were implemented when using Mohr-Coulomb and Paul-Mohr-Coulomb due to unrealistic predictions of (theoretical) tensile strength. It was determined that under tensile-compressive loading conditions, a tension cut-off provided a better match than Hoek-Brown to the data for the two rock types examined. Hoek-Brown overestimates the uniaxial tensile strength by a factor between 2-3 and has the greatest overall least absolute residual error in the low mean stress region.
|Original language||English (US)|
|Title of host publication||51st US Rock Mechanics / Geomechanics Symposium 2017|
|Publisher||American Rock Mechanics Association (ARMA)|
|Number of pages||6|
|State||Published - 2017|
|Event||51st US Rock Mechanics / Geomechanics Symposium 2017 - San Francisco, United States|
Duration: Jun 25 2017 → Jun 28 2017
|Name||51st US Rock Mechanics / Geomechanics Symposium 2017|
|Other||51st US Rock Mechanics / Geomechanics Symposium 2017|
|Period||6/25/17 → 6/28/17|
Bibliographical noteFunding Information:
ACKNOWLEDGEMENT: Partial support was provided by the MSES/Kersten Chair and the MSES Fellowship.
© 2017 ARMA, American Rock Mechanics Association.