The rock strength in different tension conditions

Comparison of the accuracy of some conventional triaxial strength criteria for intact rock

“…But we also know that 3T B is the lowest compression stress in the fracture plane of Brazilian disk; the point (À T B , 3T B ) should be on the low side of the fitting curve. On the other hand, it is not a genuine plane stresses state in Brazilian disk, and the average of Brazilian strength may be higher than the uniaxial tensile strength, although both have huge scatters [58]. Overall, it is difficult, perhaps impossible to describe the strength property in the range of minimum principal stress from -T to s C using one equation for all rocks.…”

Loading Rate Effect of Rock Material with the Direct Tensile and Three Brazilian Disc Tests

“…In experimental research of rock materials, the direct tensile test is considered the most effective method for determining rock tensile strength [2][3][4][5]. However, due to the difficulty of specimen processing and pure one-dimensional direct tensile loading, the Brazilian disc test was introduced and used widely to determine the indirect tensile strength of rock or rock-like materials [3,4,6,7], which has been accepted by many researchers [8][9][10][11][12][13] or test standards [14][15][16] because of its simplicity and ease of operation. In Brazilian disc tests, three sets of loading methods, including the strip loading method, the circular arc loading method, and the plate loading method, were usually adopted to measure the indirect tensile strength of rock materials [17].…”

Strength criterion for rocks under compressive-tensile stresses and its application

“…In other hand, the Brazilian splitting test with rock disc is easy to carry out in laboratory and provides a reasonable estimation for the uniaxial tensile strength (UTS), although there are many issues argued all along (Fairhurst, 1964;Hudson et al, 1972;Efimov, 2009;Yu et al, 2009;You et al, 2011).…”