Homogenization of a ductile porous sandstone with account of matrix pressure sensitivity
| type de publication |
communication internationale avec actes publiés |
| date de publication |
2011 |
| auteur(s) |
Lin Jian; Shen Wan Qing; Shao Jian-Fu; Kondo Djimédo |
| | |
| conférence |
The Second International Symposium on Computational Geomechanics (ComGeo II) |
| dates |
de 27-04-2011 à 29-04-2011 |
| lieu |
Cavtat-Dubrovnik, Croatia |
| nom des actes |
The Second International Symposium on Computational Geomechanics (ComGeo II) |
| | |
| pages |
105 – 113 |
| ISBN / ISSN |
978-960-98750-1-1 |
| résumé |
The present study aims at formulating and assessing a micromechanical model of porous rocks on a sandstone. The model takes advantage of a recently available homogenization-based macroscopic yield function which couples Drucker-Prager type plasticity of the solid matrix and evolving porosity. We first describe its formulation and implementation and applied then it to a Vosges sandstone. It is shown that, except for very low confining pressures for which the mechanical behavior is quasi-brittle, the model predicts well the ductile behavior at moderate or high confining pressures (in these cases the pore collapse mechanism is expected to play a dominant role). |
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