Shear critical elements experience the biaxial state of stress i.e. axial compression and transverse tension. Other than mohr-column theory, please suggest me some failure theories, which considers both states of stress.
Drucker-Prager is more effective than Mohr-Coulomb. A model named William-Warnke is very effective. Combined Drucker-Prager and William-Warnke can also be used.