Results 151 to 160 of about 2,450 (186)
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Strain Localization Conditions Under True Triaxial Stress States
2011This work uses a bifurcation approach to develop theoretical predictions for deformation band formation for a suite of true triaxial tests on Castlegate sandstone. In particular, the influence of the intermediate principal stress on strain localization is examined.
Kathleen A. Issen +2 more
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Explorations of principal stress space with kaolin in a true triaxial apparatus
Géotechnique, 1975The Cambridge True Triaxial Apparatus permits samples of soil to be tested with independent variation of the three principal stresses. A feedback system, based on a small computer, has been attached to the apparatus and this enables any three-dimensional stress path that is desired to be followed accurately.
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Limiting envelopes of a dry porous limestone under true triaxial stress states
International Journal of Rock Mechanics and Mining Sciences, 2012Abstract The present study investigates the influences of the confining pressure and the intermediate principal stress on the mechanical behaviour of a porous limestone. True triaxial tests are carried out on a broad range of confining stresses covering both brittle and ductile regimes.
Descamps, Fanny +4 more
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Predictions of large stress reversals in true triaxial tests on cross‐anisotropic sand
International Journal for Numerical and Analytical Methods in Geomechanics, 2008AbstractA rotational kinematic hardening constitutive model with the capability of predicting the behavior of soil during three‐dimensional stress reversals has been developed. An existing elasto‐plastic constitutive model, the Single Hardening Model, utilizing isotropic hardening serves as the basic framework in these formulations.
Gutta, Suresh K. +2 more
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Deformability characteristics of a rock mass under true-triaxial stress compression
Geotechnical and Geological Engineering, 2006In this paper an experimental study was planned on rock mass model with three joint sets under triaxial and true-triaxial stress states to assess the influence of joint geometry and stress ratios on deformational behaviour of rock mass. The physical models were composed of three continuous orthogonal joint sets in which joint set-I was inclined at ...
Rajendra P. Tiwari, K. S. Rao
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Physical modeling of a rock mass under a true triaxial stress state
International Journal of Rock Mechanics and Mining Sciences, 2004A study was planned in which several (77 nos.) scale free 15 cm size block mass models having three orthogonal continuous smooth saw cut joint sets and varying inclination '0 ' of joint set-I with horizontal were tested in true-triaxial system (TTS) developed by Rao and Tiwari (2002).
R.P. Tiwari, K.S. Rao
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A True Triaxial Stress Cell to simulate deep downhole drilling conditions
The APPEA Journal, 2010Conventional rock mechanics experiments using triaxial cells trying to simulate the true downhole stress field by applying equal horizontal stresses, fundamentally fail to treat real field borehole conditions as three independent stresses. In the real world, the horizontal stress field at shallow depth can have a different direction from that at ...
Rasouli, Vamegh, Evans, Brian
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Dilatancy equation of rockfill material under the true triaxial stress condition
Science China Technological Sciences, 2011Rockfill material is widely used for construction of high rockfill dam due to its facility, economical cost, high strength and effective aseismatic property. It is provoked profoundly to propose a suitable constitutive model for a better application of this material.
Yang Xiao +3 more
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Large stress reversals in true triaxial tests on cross‐anisotropic sand
International Journal for Numerical and Analytical Methods in Geomechanics, 2008AbstractThe results of a series of true triaxial tests with stress paths involving large reversals under 3D conditions are presented. These tests were performed on medium dense Santa Monica Beach sand to provide experimental evidence for the rotational kinematic hardening hypothesis presented in a companion paper and to provide stress–strain and volume
Jerry A. Yamamuro, Poul V. Lade
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Failure characteristics of two porous sandstones subjected to true triaxial stresses
Journal of Geophysical Research: Solid Earth, 2016AbstractWe conducted an extensive suite of true triaxial experiments in two porous sandstones, Bentheim (porosity ≈ 24%) and Coconino (17.5%). Our experiments demonstrate that failure of both sandstones is not only a function of σ3 but also of σ2. For a given σ3, σ1 at failure (σ1,peak) increases as σ2 is raised above σ3 between tests.
Xiaodong Ma, Bezalel C. Haimson
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