Results 151 to 160 of about 4,694 (195)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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
openaire +3 more sources
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
openaire +1 more source
A True Triaxial Cell for Soil and Rock
1988The design and performance of a membrane-piston, high-pressure (σ2 − σ3 ≦ 300 MN/m2) cell are presented. This device is similar to the one used for standard triaxial tests differing only in the stresses, σ2 and σ3, which are independently applied through flexible polyvinyl chloride (PVC) fluid cushions on prismatic specimens.
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
True Triaxial Stresses and the Brittle Fracture of Rock
Pure and Applied Geophysics, 2006This paper reviews the efforts made in the last 100 years to characterize the effect of the intermediate principal stress σ2 on brittle fracture of rocks, and on their strength criteria. The most common theories of failure in geomechanics, such as those of Coulomb, and Mohr, disregard σ2 and are typically based on triaxial testing of cylindrical rock ...
openaire +1 more source
Development of a True Triaxial Testing Facility for Composite Materials
2000An electromechanical testing facility capable of applying any combination of tensile and/or compressive forces to three mutually orthogonal axes of a thickness-tapered composite cruciform specimen was designed, fabricated, assembled, and evaluated. Any stress ratio in biaxial (σ1 - σ2) or triaxial (σ1 - σ2 - σ3) stress space can be explored using this ...
JS Welsh, DF Adams
openaire +1 more source
Behavior of EPS geofoam in true triaxial compression tests
Geotextiles and Geomembranes, 2008Abstract This paper investigates the behavior of EPS geofoam in a true triaxial apparatus using 70 mm×70 mm×140 mm prismatic brick-shaped specimens. The specimens are subjected to different stress paths in the deviator ( π ) plane by means of stress-controlled loading, in which the axial stress is imposed at a rate of 75 kPa/min in the major ...
Leo, Chin Jian (R8045) +3 more
openaire +2 more sources