... and confined conditions. Complete stress-strain curves were obtained for each test, which allowed calculating the main elastic and peak and residual strength parameters. Experimental results of the dilation angle (which showed its dependence on confining stress and plastic parameter) were fit to available...

.... The appropriateness for different rock type or for different site needs to be re-examined. structural geology residual strength peak strength reservoir geomechanics hard rock isrm international symposium Symposium post-peak strength degradation Upstream Oil & Gas strength degradation gneiss...

... to the fibres network. Furthermore, the different ways to check the energy absorption and residual strength are often less well known, and lead to confusion. The European standard EN 14487–1 mentions the different ways of specifying the ductility of fibre reinforced sprayed concrete in terms of residual...

... modulus, yield stress, peak strength, residual strength and the peak strain have been increased as the confining pressure increase, and the confining pressure also plays a decisive role on failure model of rock. And a lot of theoretical research is carried out on the damage evolution law...

... of rock to improve the model accuracy in damage-softening and residual strength, and concluded that the use of D-P criterion normally produces larger damage zone and the classical M-C criterion is more suitable. Shi et al. (2011) used Hoek-Brown criterion as the distribution parameter and discussed...

... Abstract The values of the effective stress coefficients (α) for intact and fractured rocks were evaluated for three different rocks by conventional method and compared for peak and residual strengths evaluated by Modified Failure Envelope Method (MFEM), which was developed by the authors...

... hydraulic fracturing damage mechanics damage theory compression test Engineering residual strength specimen damage model nonlinear rheology damage theory Upstream Oil & Gas Clement plane damage strain Reservoir Characterization strength equation damage zone damage variable...