Integration of Transverse Isotropy in the Instantaneous Behaviour of Geomaterials with Application to Numerical Modelling of Underground Structures
| Autor: | Sam Cuvilliez, François Laigle, Simon Raude, Roméo Fernandes, Inès Djouadi, Richard Giot |
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| Rok vydání: | 2020 |
| Předmět: |
Hydrogeology
Basis (linear algebra) Computer science Plane (geometry) business.industry Isotropy Constitutive equation 0211 other engineering and technologies Soil Science Geology 02 engineering and technology Structural engineering 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Transverse isotropy Architecture Tensor Anisotropy business 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Geotechnical and Geological Engineering. 38:4917-4938 |
| ISSN: | 1573-1529 0960-3182 |
| Popis: | The paper deals with the integration of structural anisotropy in a pre-existing constitutive law for rocks, dedicated to the numerical modelling of underground structures. On the basis of bibliographic study, two approaches were selected and applied to a simple constitutive law to begin with, namely the Drucker–Prager model. The two appraoches considered are the fabric tensor approach and the weakness plane approach. Both approaches are described, the equations are provided and the resulting anisotropic models are implemented in the open source finite element software (Code_Aster in EDF R&D code general pour l’etude du comportement mecanique des structures diffuse sous licence GNU GPL, 2017). The models are then applied to the simplified numerical modelling of an underground facility and the main results are provided. The main advantages and drawbacks of both approaches are highlighted. The main findings of this work is that the fabric tensor approach is the most fitted for the material considered for the future prospects. The future prospects are the integration of anisotropy in a much more complex isotropic model being developed by EDF research team for application to geomaterials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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