Question
Geomechanics and Ground Control Question on Stress Measurement Techniques
Mohr-Coulomb envelop between shear stress, τ and normal stress, σn of a sandstone rock is given as
τ=7.5+0.84 on (unit of stresses is MPa)
A sandstone sample is tested in triaxial mode with confining pressure of 5.0 MPa. The value of the shear stress, τ in MPa at the failure, is____.(round off up to 2 decimals)
Answer
The correct answer is: 19.00 or 20.00 (approx)