Three-dimensional numerical evaluation of the progressive fracture mechanism of cracked chevron notched semi-circular bend rock specimens

An experimental and theoretical comparison of CCNBD and CCNSCB specimens for determining mode I fracture toughness of rocks

“…Chevron bending (CB) method 16,17 Three-point bending Chevron-notched short rod (SR) method 16,17 Direct tension Cracked chevron notched Brazilian disc (CCNBD) method [18][19][20][21][22][23][24][25] Brazilian-type compression Cracked straight-through Brazilian disc method [26][27][28][29][30][31] Brazilian-type compression Modified ring method 32 Brazilian-type compression Hollow centre cracked disc method 33 Brazilian-type compression Cracked chevron notched semicircular bending (CCNSCB) method [34][35][36] Three-point bending Straight-crack semicircular bending (SCB) method [37][38][39][40] Three-point bending Flattened Brazilian disc method 41 Brazilian-type compression Edge-cracked triangular method 42 Three-point bending Four point bend rectangular beam method 5…”

Microseismic monitoring and stability evaluation for the large scale underground caverns at the Houziyan hydropower station in Southwest China

“…The maximum tensile strain criterion and the modified Mohr-Coulomb criterion with a tension cutoff were used as two damage thresholds in the damage mechanics-based model (Jeager et al, 2007). Additional details regarding the application and description of the RFPA code can be found in Tang et al (1998) and in other literatures Xu et al, 2012bXu et al, , 2014bWang et al, 2013;Wei et al, 2014;Li et al, 2006).…”

Determination of mode III fracture toughness for different materials using a new designed test configuration

“…square plate containing a center crack and subjected to far field tensile pin loading [10], the chevron notched circular or cylindrical shape specimens [11,12], the superpave IDT sample [13], circular or rectangular shape compact-tension specimen [14,15] and etc. can be used for determining pure mode I fracture toughness (K Ic ) of different engineering materials such as metals, polymers, rocks, ceramics and concretes.…”