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A Generalized Mogi–Coulomb Failure Criterion for Rocks
https://orcid.org/0000-0002-2625-4303
A generalized failure criterion is proposed to describe the rock failure under polyaxial compression. The physical meaning of the new criterion is that rock failure will occur when the distortional strain energy of the material reaches some critical value that linearly increases with the effective mean stress σm,3 on the fracture plane striking in the σ2 direction. When w = 0.5, the new criterion reduced to the linear Mogi criterion. When w = 0 and 1, it reduced to two failure criteria corresponding to the upper bound and lower bound of the failure loci on the deviatoric plane, respectively. The linear Mogi criterion is an average of the upper and lower bounds. One new failure with w = 0 was convex on the deviatoric plane in contrast to the Mogi criterion with concave failure envelopes on the deviatoric plane. The new criterion was validated against polyaxial compression test data of eight different rock types at various stress states. The new criterion achieved a very good fit to the test data of each rock type and was better than the linear Mogi criterion.
A Generalized Mogi–Coulomb Failure Criterion for Rocks
https://orcid.org/0000-0002-2625-4303
A generalized failure criterion is proposed to describe the rock failure under polyaxial compression. The physical meaning of the new criterion is that rock failure will occur when the distortional strain energy of the material reaches some critical value that linearly increases with the effective mean stress σm,3 on the fracture plane striking in the σ2 direction. When w = 0.5, the new criterion reduced to the linear Mogi criterion. When w = 0 and 1, it reduced to two failure criteria corresponding to the upper bound and lower bound of the failure loci on the deviatoric plane, respectively. The linear Mogi criterion is an average of the upper and lower bounds. One new failure with w = 0 was convex on the deviatoric plane in contrast to the Mogi criterion with concave failure envelopes on the deviatoric plane. The new criterion was validated against polyaxial compression test data of eight different rock types at various stress states. The new criterion achieved a very good fit to the test data of each rock type and was better than the linear Mogi criterion.
A Generalized Mogi–Coulomb Failure Criterion for Rocks
https://orcid.org/0000-0002-2625-4303
A generalized failure criterion is proposed to describe the rock failure under polyaxial compression. The physical meaning of the new criterion is that rock failure will occur when the distortional strain energy of the material reaches some critical value that linearly increases with the effective mean stress σm,3 on the fracture plane striking in the σ2 direction. When w = 0.5, the new criterion reduced to the linear Mogi criterion. When w = 0 and 1, it reduced to two failure criteria corresponding to the upper bound and lower bound of the failure loci on the deviatoric plane, respectively. The linear Mogi criterion is an average of the upper and lower bounds. One new failure with w = 0 was convex on the deviatoric plane in contrast to the Mogi criterion with concave failure envelopes on the deviatoric plane. The new criterion was validated against polyaxial compression test data of eight different rock types at various stress states. The new criterion achieved a very good fit to the test data of each rock type and was better than the linear Mogi criterion.
A Generalized Mogi–Coulomb Failure Criterion for Rocks
Int. J. Geomech.
Jiang, Hua (Autor:in) / Yang, Yang (Autor:in) / Chorzepa, Mi G. (Autor:in)
01.04.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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