... Artificial Intelligence fracture mechanics stress intensity factor variation initiation Upstream Oil & Gas fracture toughness borehole crack tip mechanics propagate fracture initiation propagation hydraulic fracturing energy release rate crack length eurock 2012 linear...

... of a modified version of Arcan specimen with a crack subjected to mixed mode loading. The finite element analyses of bonded joints were also studied for different thickness and crack length. The mixed-mode fracture toughness tests were carried out by using rectangular specimens over a wide range of loading...

... Characterization Upstream Oil & Gas Lindqvist reservoir geomechanics stress intensity factor bit selection crack length Engineering indenter profile indentation fracture crack propagation interaction stress distribution indenter rock interaction lateral crack mechanical excavation machine Rock...

... of these specimens are shown in Table 1. gas monetization rock mountain andesite low temperature liquified natural gas strength crack length compression test granite LNG temperature distribution thermal hysteresis room temperature Deformation Characteristic Midstream Oil & Gas uniaxial...

... reservoir geomechanics elasticity specimen Wellbore Design crack length Reservoir Characterization hydraulic fracturing toughness fracture toughness value rod fracture toughness test result fracture toughness Upstream Oil & Gas Ankara andesite technical university DCB test...

... introduced in this paper includes both the prepeak and the post-peak behaviour. Wellbore Design crack density model parameter closure Upstream Oil & Gas Simulation low stress level Reservoir Characterization volumetric strain crack length aspect ratio open crack reservoir geomechanics...

... of the bending beam, which is expressed by g=ED/S, where E is Young's modulus, D the diameter of the specimen and S the slope of the load vs. displacement curve. The initial and the growing crack lengths are represented by the dimensionless terms αο and α, which are defined as the ratios of the crack...