... with a dilantancy- based flow rule will be used, as described in Equations (1) and (2). Parameters Kp and K are related to friction and dilatancy angles, respectively, in the usual way (Equation 3). Variation of cohesion C and friction angle with the plastic parameter p1 p3) was obtained using the methods...

... the dilatancy angle of the material; For high values of the confining stress the plasticity theory does no longer verify and the sample loses completely its structure; In the frontier zone of high confining pressures when the plasticity theory is about to stop verifying horizontal or nearly horizontal failure...

... at residual strength. The influence of the normal stress on volumet- ric strain is shown on Figure 5: dilatancy decreases with increasing normal stress. The dilatancy angle is determined on the normal displacement versus shear displacement curve. We observe that the maximum dilatancy angle is reached after...

...Eurock 2005 -Impact of Human Activity on the Geological Environment - Konecny (ed) © 2005 Taylor & Francis Group, London, ISBN 04 1538 042 1 A model to estimate the dilatancy angle of rock masses L.R. Alejano & E. Alonso Department of Natural Resources & Environmental Engineering, University...

...). The meaning of the variable used in the formulation is as follows: 0/: dilatancy angle k normal sri ffness k.: shear stiffness. f3 and y have no physical meaning but are added to model rock joints specific behavior: ex = zero; in case of elasticity and ex = 1; in case of plasticity, f3 = zero; for opened...

.... The same findings are obtained. constant dilatancy non linear strength law safety factor Planar Failure Surface strength law different safety factor Serrano failure plane slope angle Upstream Oil & Gas normalised height coefficient hypothesis Hoek calculation dilatancy angle...