A quantitative comparison of six rock failure criteria

The elastoplastic shear stability of an inclined borehole is explored in this study. Unlike other previously published elastoplastic wellbore stability solutions, this work considered the contributions of the anti-plane shear stresses. A new framework for estimating the critical elastoplastic collapse pressure and the extent of the plastic zone around the borehole is presented. In this approach an elastoplastic material model is coupled with a...