... and residual strength as well as other post-peak parameters. Particular attention was given to the study of dilatancy. Dilation angle of these intact rocks was fitted to two pioneering but still recent dilatancy models (Alejano & Alonso 2005; Zhao & Cai 2010), having the feature of being plastic-shear...

... reservoir geomechanics initial dilation angle axial strain Poisson Upstream Oil & Gas Rock mechanics peak strength granite irrecoverable strain dilation angle mStrain plastic strain Reservoir Characterization Zhao pre-peak dilatancy strain curve variable poisson dilatancy...

.... Particular attention has been given to the study of dilation. The dilation angle of these intact rocks has been fitted to recently developed models for plastic shear strain and confinement-stress-dependent dilation. Even if the dilative response of these rocks has shown to follow similar trends to those...

... and the stability during design and construction analysis. Reservoir Characterization mean pressure triaxial compression path strength mechanism compression path threshold thermo-mechanical behavior waste management viscoplastic constitutive model dilation angle initial elastic threshold...

... obtained from the proposed dilation angle model, which considers the influence of confining stress and plastic shear strain, are more reasonable than those obtained from a series of constant dilation angles, and the predictions are found to be in good agreement with field measurement results. 1...

... given with a deterministic value. This paper presents the results of fourteen shear tests tested under a constant normal stress of approximately 0.8 MPa. The samples were taken from a slightly weathered rock joint in granite. Basic friction angle and dilation angle, together with shear and normal...

... Characterization dilation angle consideration powder material basic friction angle equation strength direct shear test joint surface roughness shear stress MODELING OF THE SHEAR BEHAVIOR OF NATURAL ROCK JOINTS IN CONSIDERATION OF POWDER GENERATED BY THE SHEAR PROCESS KJSHIDA, KJYOSHI Kyoto University...