Results 181 to 190 of about 1,909,198 (259)
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Endochronic Modeling of Sand in True Triaxial Test
Journal of Engineering Mechanics, 1985The endochronic constitutive equation is written in differential form, which is then used to describe the deviatoric behavior of drained sand in true triaxial test. Explicit equations have been derived. The modified concept of intrinsic time is applied so that no built‐in discontinuities exist in the constitutive equation. Triaxial compression test (TC)
Han C. Wu +2 more
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Development of a True Triaxial Apparatus for Sands and Gravels
Geotechnical Testing Journal, 2008Abstract This paper presents a recently developed true triaxial apparatus and a series of verification studies. The apparatus is capable of handling 241-mm cubical specimens providing the means for testing specimens under a wide variety of stress paths under drained and undrained conditions.
Changho Choi +2 more
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True-triaxial strength criteria for rock
International Journal of Rock Mechanics and Mining Sciences, 2009Abstract This paper reviews some strength criteria which include the role of the intermediate principal stress, and proposes a new criterion. Strength criteria of the form σ oct = f N ( σ oct ), such as Drucker–Prager, represent a rotation surface in the principal stress space, symmetric to the line σ 1 = σ 2 = σ 3 in the meridian plane ...
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True Triaxial Apparatuses with Two Rigid Boundaries
Site Characterization and Modeling, 2005A small-scale and a large-scale true triaxial apparatuses (where σ1≠σ2≠σ3) were recently developed at the Institute of Industrial Science, University of Tokyo, Japan and are described in this paper. In these apparatuses, a comprehensive loading system that can control both strain rate and stress rate is used for the vertical (axial) direction.
L. Q. AnhDan +3 more
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A rock test cell with true triaxial capability
Geotechnical & Geological Engineering, 1999Conventional so-called triaxial test cells apply the axial stress to a cylindrical sample using steel platens, with the confining stress developed via an annulus of hydraulic fluid retained by a liner in a pressure cell. This does not allow differentiation between the two principal stresses around the core and inhibits the realism with which the rocks ...
B.D.G. Smart +2 more
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DEM simulations of sandstone under true triaxial compressive tests
Acta Geotechnica, 2016Numerically simulated true triaxial compression tests (σ 1 ≥ σ 2 ≥ σ 3) are conducted in this study to elucidate the failure mechanism of sandstone using 3D discrete element method (DEM), in particular the effect of the intermediate principal stress (σ 2 ...
K. Duan, C. Y. Kwok, X. Ma
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True Triaxial Tests on Natural Shanghai Clay
2018Drained true triaxial tests on undisturbed and remolded Shanghai silty clay were carried out to investigate the influence of intermediate principle stress on the strength and deformation of natural clay. Test results show that not only the shear strength, but also the volume change of Shanghai clay decreases with the increase of Lode angle θ. The shear
Guan-lin Ye +3 more
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Results of true triaxial strength tests on rock salt
Engineering Fracture Mechanics, 1990Abstract Knowledge of the thermomechanical properties of rock salt is important for the dimensioning of a permanent repository for radioactive wastes in a salt dome and for the necessary safety analysis, as well as for the design of mines and caverns.
U Hunsche, H Albrecht
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True-triaxial compressive strength of Maha Sarakham salt
International Journal of Rock Mechanics and Mining Sciences, 2013Abstract True triaxial compressive strengths of the Maha Sarakham salt are experimentally determined by using a polyaxial load frame. The salt specimens with nominal dimensions of 5.4×5.4×10.8 cm 3 are loaded to failure with the minimum principal stress, σ 3 , varying from 0 to 7 MPa, and the intermediate principal stress, σ 2 , varying from 0 ...
Tanapol Sriapai +2 more
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Why does the World Need a True Triaxial Tester?
Particle & Particle Systems Characterization, 2007AbstractThe necessity for intensified research in the field of powder flow behavior is illustrated in this paper. It is argued that recent developments with respect to discrete element modeling, measurement techniques (AFM) and multidisciplinary approaches are particularly helpful in the understanding of powder flow behavior.
Richard Janssen, Marco Verwijs
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