In a standard triaxial test, only two principal stresses are controlled—the axial stress (σ1) and the confining stress (σ3). The intermediate principal stress (σ2) is assumed to be equal to the confining pressure due to the geometry of the cylindrical test specimen. However, in the fie...
Triaxial extension tests were carried out on hollow cylinder sand specimens of identical external geometry under identical test boundary conditions. For reference, solid cylinder sand specimens were tested under identical boundary conditions. The radial width of the hollow cylinders was varied and the ...
The most important characteristics for a geotechnical slope stability evaluation are the geometry of the slope and underlying soil layers, the soil unit weight and strength, and the description of the triggering mechanism, if any. The geometry of the slope is best characterized from the bathymetry,...
Railway ballast performance: Recent advances in the understanding of geometry, distribution and degradation Transportation Geotechnics Journal2023, Transportation Geotechnics Can Shi, ... Yunlong Guo Test summaries Table A. 2 (appendix), shows laboratory tests, field tests and full-scale track tests appl...
The paper investigates reproducing the effects of confining pressure on the behaviour of scaled railway ballast in triaxial tests in discrete element model
Stage I is the micro crack closure compaction stage of the rock. The existence of this stage depends on the density and geometry of existing cracks. The stress threshold during this stage is the crack closure stress (σcc). Once internal cracks are completely closed, the specimen enters the ...
isolated from the micro-structure of the material. Establishing these relationships can be difficult and generally result in idealization and simplifications in terms of particle shapes, contact geometry, and its evolution. On the other hand, within GMA, the grain-scale constitutive relationships represe...
Experimental study on the effect of fracture geometric characteristics on the permeability in deformable rough-walled fractures Int. J. Rock Mech. Min. Sci. (2017) Y.D.Chenet al. The influence of fracture geometry variation on non-Darcy flow in fractures under confining stresses ...
The existence of this stage depends on the density and geometry of existing cracks. The stress threshold during this stage is the crack the elastic deformation stage closure stress (Stage II). In t(hσicsc)s.tOudnyc,ethineteexrnisatlincgraicnkistiaarl ecrcaocmksplaerteelpyacrltoiasleldy ,...
or related formations. Accurate propagation prediction enables proper orientation of horizontal laterals to minimize breakdown pressure, maximize fracture connectivity in the near-wellbore, and create an ideal geometry for maximum coverage of the intervals between wells by the hydraulic fracture and accompan...