Elasto-plastic analysis of elliptical cavities in rock subject to non-hydrostatic loading

C. Carranza-Torres, C. Fairhurst

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The paper describes a (FLAC) numerical analysis of the response of cavities of elliptical shape in isotropic elastic perfectly-plastic materials when subjected to non-hydrostatic external stresses and uniform internal pressure. Cases in which the plastic zone completely surrounds the cavity are considered. The material is assumed to obey a Mohr-Coulomb yield condition and the associated flow rule. The extension and shape of the plastic region and the amount of convergence occurring at the wall have been determined using FLAC. Results are compared with those for an equivalent circular cavity under hydrostatic and non-hydrostatic loading. The comparison provides insight on the appropriate orientation of elliptical and similar non-circular cavities (with respect to the directions of the far-field stresses) to minimize the size of the plastic failure region and the resulting convergence.

Original languageEnglish (US)
Title of host publicationFLAC and numerical modeling in geomechanics. Proceedings of the international FLAC symposium, Minneapolis, September 1999.
EditorsC. Detournay, R. Hart, C. Detourney, R. Hart
Pages215-223
Number of pages9
StatePublished - Dec 1 1999
EventProceedings of the 1999 FLAC and numerical modeling in geomechanics symposium. - Minnesota, United States
Duration: Sep 1 1999Sep 3 1999

Publication series

NameFLAC and numerical modeling in geomechanics. Proceedings of the international FLAC symposium, Minneapolis, September 1999.

Other

OtherProceedings of the 1999 FLAC and numerical modeling in geomechanics symposium.
CountryUnited States
CityMinnesota
Period9/1/999/3/99

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