... ≠ σ 3 ) (Haimson BC, 1978; Brace WF et al., 1980; Vernik L et al., 1992). It is important to consider general states of stress to fully understand failure characteristics of sandstone. Reservoir Characterization hoek-brown strength criterion sandstone test data reservoir geomechanics...

...-Brown equation. When depicted in the principal stress space, the new failure surface circumscribes the Hoek-Brown surface with smooth contacts at six corners. Four sets of true triaxial test data collected from the published literature are simulated to demonstrate the performance of the proposed 3-D...

... specimen test data loading condition mode II ii crack growth asseessment marble pure mode ii loading configuration fracture ISRM International Symposium 2008 5th Asian Rock Mechanics Symposium (ARMS5), 24-26 November 2008 Tehran, Iran MIXED MODE I/II CRACK GROWTH ASSEESSMENT FOR DEHBID MARBLE...

... fracture behaviour of rocks. Among these techniques, the cracked Brazilian disc (BD) specimen and the maximum tangential stress (MTS) criterion are the most commonly used experimental and theoretical methods, respectively for mixed mode fracture study of rock materials. However, the reported test data...