... of circular disks connected with cohesive and frictional bonds. In this model, the breakages of bonds between particles by applied local stresses are expressed as cracks. PFC does not require any flow rule for describing the post peak region or fracture toughness to control fracture behavior, but only...

... of wave energy. The degree of absorption is applied to calculating the material's physical properties such as density, porosity, and also the material's shear strength values at varying depths in terms of cohesion and internal friction angle. Dielectric permittivity is also used to calculate the moisture...

... with the effective stress principle and consolidation theory. Within such framework, sanding is considered to occur only when seepage conditions exceed the resistance from intergranular friction, arching, and mechanical and chemical cementation. The significant added value using such an approach in oil and gas...

... of presentation. After shifting the data, the measured loads were compared with the weight of material actually in the shaft. Only the first and second dumps filling the hopper were used to scale tests, since it was assumed that by the third dump, frictional resistance from the walls of the shaft might...

... the influence of pore fluid type on fault mechanics by means of sliding friction tests on 300 sawcut cylindrical specimens in a triaxial apparatus. Tests were run dry and with mineral oil or water as pore fluids with the experimental program designed to obtain a variety of sliding behaviors (stable/unstable...

... a suite of axisymmetric compression tests. The model includes dependence of the dilation factor, friction factor, and plastic hardening modulus on mean stress and accumulated inelastic shear strain. Although the development of the constitutive model assumed uniform deformation in the samples, here we use...

... of parametric studies. reservoir geomechanics metals & mining displacement friction regime cohesion investigation total displacement Reservoir Characterization orientation Simulation stability excavation Upstream Oil & Gas moderately jointed rock mass discontinuity jointed rock...

... stiffness, is very complex. Scholtz (1990) stated that there is no constitutive law for friction quantitatively built upon micro-mechanical framework because of the complexity of shear contacts, the topography of contacting surfaces and the evolving surfaces topography during sliding. Even if a numberless...

... deformation processes caused by path-dependent development of grain-scale shear and tensile failures. However, odometer experiments carried out on disintegrated samples of the Oseberg sand show that it is difficult to define a coefficient of friction for a granular material composed of circular particles...