Failure criteria (Mohr-Coulomb)

Input(s)

$\sigma_{a}$: Principle Stress (psi)

$\sigma_{b}$: Second Strongest Stress (psi)

B: Angle Between Fault and Direction of Principle Stress (degrees)

Output(s)

$\tau$: Shear Stress (psi)

$\sigma$: Normal Stress (psi)

Formula(s)

Reference(s)

Mark D. Zoback, Reservoir Geomechanics, Cambridge University Press, UK, Page: 89.