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Showing 1 to 16 of 16 for “"Mohr-Coulomb Failure"”.
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Problemas de estado de equilíbrio limite nos solos: seu estudo e sua programação
… soils of the theory of plasticity based on the Mohr-Coulomb failure criterium. Follows the study of the limit equilibrium for granular media, according to Sokolovskii's theory, specially the bearing capacity problem. Finally a computer program in FORTRAN LANGUAGE to calculate the stress …
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Mechanics of interseam failure in multiple horizon mining
The mechanics of massive interseam failure in a multiple seam mine was investigated using three approaches: case studies, physical models and computer analysis. Specific examples of multi-seam mines with the underlying seam mined first prior to the mining of the overlying seam were studied with …
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Stress-density relationships for an agricultural soil
… used to evaluate the soil parameters under the Mohr-Coulomb failure criteria. Furthermore, the influence of the initial soil density on the soil behavior was evaluated and subsequently compared to the results of a similar study conducted under a different initial density.
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Analytical and numerical studies on mismatch strain related problems
… analyzed: self-assembling of polymer thin film, failure of nanotube and nanorod silicon anodes in lithium batteries and modified failure criterion for earthquake distribution along the earth depth. The first chapter discusses analytical and experimental results of self-assembling of thin films …
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High green density metal parts by vibrational compaction of dry powder in three dimensional printing process
… Particulate stress / strain models, such as the Mohr-Coulomb failure law and the Jenike yield locus theory, were used to interpret the packing behavior of the metal powders under various stress conditions.
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Permanent deformation behavior of unbound granular materials and rutting model development
… stress/strength level, which can be derived from Mohr-Coulomb failure criteria, was introduced in this study to properly examine the effects of varying degree of stress/strength to permanent deformation behavior of unbound materials. These test results established a complete database to develop …
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Multiscale determination of in situ stress and fracture properties in reservoirs
… Two types of data used are stress-induced rock failures in the borehole, known as "breakouts," and the dispersions of polarized flexural waves which propagate along the borehole. Traditionally these data are analyzed to derive stress orientations but not magnitudes. To determine the magnitude of …
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Constitutive relationships for agricultural soils
… constitutive model was developed based on a Mohr-Coulomb failure surface. The constitutive model developed was evaluated by simulating a triaxial test at a confining pressure of 28 kPa. Initial conditions were computed by substituting the boundary stresses into the model to determine the …
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Improved methods for forward and inverse solution of the wave equation for piles
… of the hammer, pile and soil system using the Mohr-Coulomb failure criterion, Newmark's method for the dynamic solution and a modified Newton method for the static solution. Soil properties were aggregated to simplify data entry and analysis. The three-dimensional model allowed for more …
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Influence of sand friction angle, grout stiffness, and confinement on the behavior of acrylamide and sodium silicate grouted sand
… using sand friction is appropriate when the failure strain of grout exceeds at least 4 times the failure strain of ungrouted sand, due to strain compatibility. Additionally, acrylamide-grouted sand unconfined compressive strength models developed from 25 compression tests are presented using …
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Numerical investigation of polymer injection effects on geomechanical reservoir properties during enhanced oil recovery
… minimum stresses are used to determine the rock failure criteria at different polymer viscosities and injection rates. We determine the rock failure criteria using the Mohr-Coulomb failure envelope. Water injection efficiency, in terms of oil recovery, increased after the first polymer injection …
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Experimental study of shear behaviour of high density polyethylene reinforced sand under triaxial compression
… of confining stresses. Consequently, a bilinear failure envelope was reported in reinforced samples while unreinforced specimens realised a linear relationship. The Mohr-Coulomb failure line above the critical confining pressure almost paralleled the unreinforced linear relationship. An …
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Performance-based evaluation of unbound aggregates affecting mechanistic response and performance of flexible pavements
… and also relating to shear strength via the Mohr-Coulomb failure criteria. A unified approach to rutting prediction that is applicable to a much wider range of stress states and physical conditions is also developed based on shear strength properties and validated using actual rutting …
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Investigated physical/strength properties and elastic constants of fimbul granular ice applied to ice cliff stability analysis
… cracks which created concerns of shelf failure, risking the lives of crew and the ship stationed at the bottom of the cliff. To assess the risk of failure, this study was carried out to quantify the stability of the vertical cliff. A slope stability analysis model was required to achieve …
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The Role of Soil Stiffness in Reverse Fault Rupture Propagation
<p>A nonlinear Mohr-Coulomb constitutive model with a strain dependent yield surface and non-associated flow was employed to study the plastic soil properties which affect the rate of surface fault rupture propagation in reverse events. These numerical simulations show a trend for soils with higher …
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Borehole Breakouts in Transversely Isotropic Posidonia Shale
… are point-symmetric and form compressive shear failure planes, which can be predicted by a Mohr-Coulomb failure approach. If the shear failure planes intersect, conjugate breakouts can be described as "dog-eared” breakouts. While the initiation of breakouts for wells oriented normal to the …