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Keywords: wing crackClose
Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-012
... numerical model in this paper uses Mohr-Coulomb shear strength criterion with parameters of cohesion, friction, and tensile strength as tested in the laboratory. Artificial rock samples with 75 bridge angle were tested in the laboratory under uniaxial loading until failure. Curvilinear cracks (wing crack...
Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-125
.... 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...
Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-114
... 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...
Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-054
... 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...
Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-076
... 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...
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