A coupled octahedral formulation of intact rock behavior
Abstract
An incremental octahedral formulation is proposed to model the response of intact rock to multiaxial loading assuming isotropic and non-linear behavior. The octahedral stress-strain relations involve three tangent moduli: a tangent bulk modulus, a tangent shear modulus and a coupling modulus. This formulation accounts for the experimentally observed coupling between hydrostatic and deviatoric responses and has certain features which can be extended into the thermodynamics concept of entropy.
Fields of Study & Subjects
Rock Mechanics and Modeling
Grouting
Rheology
and Soil Mechanics
Drilling and Well Engineering
Publication details
- Pages
- 85–94
- Publication date
- 13 February 2026
- Language
- EN
- Document type
- Book chapter