... Artificial Intelligence Einstein hydraulic fracturing concentration laboratory Reservoir Characterization structural geology wing crack mechanism Coalescence reservoir geomechanics Upstream Oil & Gas shear specimen bridge area joint tip tensile stress loading tensile...

.... Tensile wing cracks are exclusively the only primary cracks that initiate from a single pre-existing opening or closed flaw. Secondary cracks mostly form through coalescence of tensile micro-cracks. The second part of the study investigates fracture propagation from a fluid pressurized pre-existing...

... notch crack hydraulic fracturing wing crack specimen notch crack loading diametral compressive cyclic loading static loading Understanding Rock Fatigue Part II: Possible Damage Mechanism N. Erarslan & D.J. Williams Geotechnical Engineering Centre, The University of Queensland, Brisbane...

... angle (bridge angle) are varied under fixed flaw angle and flaw length and the crack propagation and coalescence mechanism are studied. Two types of cracks initiate from the tips of the flaws: wing cracks and secondary cracks. Wing cracks, secondary cracks or combination of them produce the coalescence...

... of the joints, changed from 0° to 120° with an increment of 15°. The failure mechanism monitored by visual inspection and magnifier to detect cracks initiation. In all of the tested samples curvilinear cracks called wing cracks initiated at the joints tips due to high tensile stresses concentration this wing...