Theoretical and computational investigation of the fracturing behavior of anisotropic geomaterials
The fracturing process in geomaterials is studied to characterize a potential host rock for radioactive waste, such as the kaolinite-rich Opalinus Clay formation. Because of its sedimentary genesis, this rock can be considered as a transversely isotropic geomaterial. A semi-circular bending test is...
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| Veröffentlicht in: | Continuum mechanics and thermodynamics 2023-07, Vol.35 (4), p.1417-1432 |
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| creator | Dimitri, Rossana Rinaldi, Martina Trullo, Marco Tornabene, Francesco |
| description | The fracturing process in geomaterials is studied to characterize a potential host rock for radioactive waste, such as the kaolinite-rich Opalinus Clay formation. Because of its sedimentary genesis, this rock can be considered as a transversely isotropic geomaterial. A semi-circular bending test is here modeled based on the eXtended Finite Element Method (XFEM), to check for the formation and propagation of cracks in the rock, with a particular focus on the effect of notch dimensions and scale effects on the fracturing response of the specimen in terms of peak load. Starting with the XFEM-based results, a novel analytical formulation is also proposed to approximate the response of the material in terms of load-crack mouth opening displacement. The proposed formulation is also capable to provide a reliable estimate of the peak value and time history response, compared to some experimental predictions from literature, starting from a predefined value of initial notch depth, which could represent a useful theoretical tool for design purposes. |
| doi_str_mv | 10.1007/s00161-022-01141-4 |
| format | Article |
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| subjects | Analysis Anisotropy Classical and Continuum Physics Crack propagation Engineering Thermodynamics Finite element analysis Finite element method Fracture mechanics Fracturing Geomaterials Heat and Mass Transfer Investigations Kaolinite Laboratories Load Original Article Peak load Physics Physics and Astronomy Propagation Radioactive wastes Rocks Structural Materials Theoretical and Applied Mechanics |
| title | Theoretical and computational investigation of the fracturing behavior of anisotropic geomaterials |
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