... affected the intensity of mode II loading, and thus affected the peak failure load and fracture path. When notches were printed at the same location, crack propagation, peak failure load and fracture surface roughness were found to depend on both the layer and mineral fabric orientations. The uniqueness...

... ring specimen Modeling & Simulation experimental result Dionyso marble failure load specimen Experimentally 1. INTRODUCTION The experimental determination of the tensile strength of rocks is of great importance because the tensile failure is an important phenomenon in mining engineering...

... strength propagation specimen metals & mining fracture toughness value upstream oil & gas failure load brisbane rock mechanics fracture toughness ccnbd specimen hydraulic fracturing sandstone specimen anisotropy sandstone reservoir characterization reservoir geomechanics...

... study revealed that the CCNBD geometry and the Brisbane Tuff rock have higher failure loads than the SCD geometry and concrete sample counterparts. Following the experiments, a series of numerical analyses were then performed using FRANC2D software to simulate the stress distributions and fracturing...

... on rock anisotropy via numerical simulation methods. Reservoir Characterization inclination angle particle Upstream Oil & Gas Mining Science numerical simulation reservoir geomechanics Brazilian test anisotropic rock failure load tensile strength international journal particle...

... crack inclination angles of 45? and 60?. A second series of diametral compression testing with increasing cyclic loading amplitude showed that the failure load decreased between 30% and 45% compared with that under static loading. Comparison of the load–CMOD (crack mouth opening displacement) plots...

... strength Reservoir Characterization Upstream Oil & Gas internal length scale failure load Wellbore Design sand production borehole wall initial failure diameter loading plastic shear strain reservoir geomechanics size effect borehole anisotropic loading cavity Continuum stability...

.... The usefulness of these models were compared and discussed. hydraulic fracturing cylinder experiment strength process zone physical test Reservoir Characterization notch tip notch length specimen notch fracture reservoir geomechanics Peak Load failure load sensor notch beam intrinsic...

... experiment Wellbore Design weakly consolidated sandstone failure load wellbore integrity Reservoir Characterization strength shear failure shear band Castlegate sandstone cylindrical cavity splitting failure cavity bifurcation theory artificial sandstone bifurcation point sandstone van den...

... Upstream Oil & Gas physical model shot density geometry debris borehole stability Engineering perforation stability diameter perforation Completion Installation and Operations perforation diameter failure load productivity fracture deformation numerical model interaction...

... have been used for this study. acoustic emission failure load acoustic emission analysis waveform Reservoir Characterization Imaging experiment corner frequency frequency source location tomographic velocity imaging tomographic imaging Upstream Oil & Gas mechanism acoustic...

...+) Tyi el d : 2C(tan+ - tans) (1 + tanstan+) (3) 1060 ISSUES IN ROCK MECHANICS For this case, the full in-situ stress field is transmitted across the wedge resulting in a value for T which may be taken as an upper bound to the failure load. For positive :, T/C is a maximum when Ks<<Kn 6 : C(tan+ - tanm...

... that have been varied to determine failure load Q (Figure 1). If a dimen- sional analysis is performed, the number of calcula- tions required to describe variations of each par- ameter is minimized. If penetration depth 6 and an arbitrary reference stress Z are used as reference length and stress...

... flow in porous media flow rate specimen permeability curve fracture Upstream Oil &amp; Gas failure load envelope loading Reservoir Characterization deformation MN sq hydrostatic loading fracture initiation investigation permeability change permeability Fluid Dynamics sandstone...

... reservoir geomechanics plasticity rock behavior Reservoir Characterization Soil mechanics coal Wellbore Design strength Rock mechanics Upstream Oil &amp; Gas circular punch envelope indentation failure load failure envelope lower bound solution sandstone rock failure uniaxial...