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What is 3D Rock Failure Criteria Modifications about?

This document discusses failure criteria for rocks based on smooth approximations to the Mohr-Coulomb and Hoek-Brown failure functions. It proposes modified 3D versions of these criteria that account for the influence of the intermediate principal stress and are smooth, convex functions. The criteria are formulated in terms of stress invariants, which allows for easy identification of strength parameters from polyaxial test data. Eight sets of polyaxial test data from literature are fitted using the propose

Author

Reza Osgoui

Language

EN