| Autor: |
Tereza Žalská, Michal Šejnoha |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Acta Polytechnica CTU Proceedings, Vol 40 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2336-5382 |
| DOI: |
10.14311/APP.2023.40.0117 |
| Popis: |
The present paper revisits a stress update procedure for the Hoek-Brown plasticity model enhanced by a Rankine type of tension cut-off failure criterion. Limiting tensile stresses not only supports the behavior of weak rock masses with a very low tensile strength but in combination with the original Hoek-Brown model improves robustness of the stress update procedure, i.e. the stress return mapping algorithm. Herein, the primary focus is on the stress return from a space of inadmissible trial stresses for which neither the Hoek-Brown yield surface nor its derivative can be evaluated. All potential scenarios are thoroughly discussed both in the framework of single- and multi-surface plasticity. The presented procedures were implemented and verified with the help of the Geo5 FEM software. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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