Journal
INTERNATIONAL JOURNAL OF GEOMECHANICS
Volume 22, Issue 3, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)GM.1943-5622.0002272
Keywords
Hoek-Brown strength criterion; Multiyield-surface constitutive model; Cyclic behavior of rock and rockfill
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Funding
- FONDECYT-INICIACION research [11181252]
- Universidad de Chile, Project U-Inicia [UI 24/2018]
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This work presents the implementation of a simplified three-dimensional Hoek-Brown strength criterion using a multiyield-surface plasticity approach. The adopted three-dimensional simplification takes into account the influence of the intermediate principal stress and maintains simplicity in numerical implementation. The introduction of multiple yield surfaces allows for a smooth definition of the material's nonlinear stress-strain behavior, while a kinematic hardening rule enables a hysteretic and path-dependent stress-strain response.
This work presents the implementation of a simplified three-dimensional Hoek-Brown strength criterion using a multiyield-surface plasticity approach. The adopted three-dimensional simplification of the strength criterion accounts for the intermediate principal stress influence, maintaining the simplicity in the numerical implementation. This criterion corresponds to a paraboloid surface of circular cross section in the principal stress space. The introduction of multiple yield surfaces allows for a smooth definition of the nonlinear stress-strain behavior of the material. In addition, a kinematic hardening rule is adopted, allowing yield surfaces to translate with loading, enabling a hysteretic and path-dependent stress-strain response.
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