Table 1 Input parameters used in rock models with CSTBD and NSCB configurations.
From: The influence of friction on the determination of rock fracture toughness
Description | CSTBD configuration | NSCB configuration |
|---|---|---|
Specimen radius, R (mm) | 31.5 | 50 |
Notch length, a (mm) | 25.2 | 25 |
Half the span of roller support, S (mm) | – | 25 |
Friction coefficients between the rigid plate or Roller support and the specimen | 0,0.1,0.2,0.3,0.4 | Â 0,0.1,0.2,0.3,0.4 |
Element type | CPS4R, CPS3 | Â |
Elastic modulus, E (GPa) | 26.77 | 2.9 |
Poisson’s ratio | 0.2 | 0.38 |
Load, F (N) | 1000 | Â 1000 |
