Influence of end effect on rock strength in true triaxial compression test

The influence of the end effect on rock strength in true triaxial compression testing was studied using a numerical approach. The influence of the intermediate principal stress (σ 2 ) on rock strength was isolated by using the two-dimensional Mohr–Coulomb failure criterion that depends only on the major principal stress (σ 1 ) and minor principal stress (σ 3 ). Thus, any enhancement to the rock strength with the increase of σ 2 can be attributed...