Hyperelastic nature of the Hoek–Brown criterion
Journal Article
·
· European Journal of Mechanics. A, Solids
- Univ. of Arizona, Tucson, AZ (United States)
- Électricité de France, Palaiseau (France)
- Univ. de Montpellier (France)
In this article, we propose a nonlinear elasto-plastic model, for which a specific class of hyperbolic elasticity arises as a straight consequence of the yield criterion invariance on the plasticity level. We superimpose this nonlinear elastic (or hyperelastic) behavior with plasticity obeying the associated flow rule. Interestingly, we find that a linear yield criterion on the thermodynamical force associated with plasticity results in a quadratic yield criterion in the stress space. This suggests a specific hyperelastic connection between Mohr–Coulomb and Hoek–Brown (or alternatively between Drucker–Prager and Pan–Hudson) yield criteria. We compare the elasto-plastic responses of standard tests for the Drucker–Prager yield criterion using either linear or the suggested hyperbolic elasticity. Notably, the nonlinear case stands out due to dilatancy saturation observed during cyclic loading in the triaxial compression test. We conclude this study with structural finite element simulations that clearly demonstrate the numerical applicability of the proposed model.
- Research Organization:
- Univ. of Arizona, Tucson, AZ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Computational Science Research & Partnerships (CSRP)
- Grant/Contract Number:
- SC0024246
- OSTI ID:
- 3025767
- Journal Information:
- European Journal of Mechanics. A, Solids, Journal Name: European Journal of Mechanics. A, Solids Vol. 115; ISSN 0997-7538
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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