Failure of Castlegate Sandstone Under True Triaxial Loading
A test series designed to investigate and quantify the effect of the intermediate principal stress on the failure of Castlegate sandstone was completed. Using parallelepiped specimens and a true triaxial testing system, constant mean stress tests were conducted. Stress states ranged from axisymmetric compression to axisymmetric extension. Results suggest a possible failure dependence on the third invariant of deviatoric stress at lower mean stresses.
KeywordsSandstone True triaxial compression Failure Third stress invariant Deformation band
The authors gratefully acknowledge funding from the National Science Foundation Award EAR-0711346 to Clarkson University.
Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration under contract DE-AC04–94AL85000.
- H.F. Christensen, M.G. Stage, N.K. Loe, B. Plischke, O. Havmoller, Impact of the intermediate principal stress on rock strength: polyaxial testing and numerical simulations, in Proceedings North American Rock Mechanics Symposium. #04–469, University of Washington, Seattle, WA, 2004Google Scholar
- K.A. Issen, M.D. Ingraham, T.A. Dewers, Strain localization conditions under true triaxial stress states, in Proceedings of the 11th International Workshop on Bifurcation and Degradation in Geomaterials, 2010Google Scholar
- P.V. Lade, J.M. Duncan, Cubical triaxial tests on cohesionless soils. J. Soil Mech. Found. Div. 99, 793–812 (1973)Google Scholar
- P.V. Lade, M.K. Kim, Single hardening constitutive model for frictional materials, III: comparisons with experimental data. Comput. Geotech. 6, 31–47 (1988)Google Scholar
- J.W. Rudnicki, J.R. Rice, Conditions for the localization of deformation in pressure-sensitive dilatant materials. J. Mech. Phys. Solids 23, 371–394 (1975)Google Scholar