Constitutive modeling and discontinuous bifurcation assessment in unsaturated soils
In this work an elastoplastic constitutive theory for unsaturated soils is presented. The proposed material model is formulated in the general framework of the thory of porous media and of the flow theory of plasticity. The model is based on an extension of the well-known MRS Lade model whereby the...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2006 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/87083 |
| Acceso en línea: | http://hdl.handle.net/11336/87083 |
| Access Level: | acceso abierto |
| Palabra clave: | MODELING ASSESSMENT UNSATURATED SOILS https://purl.org/becyt/ford/2.7 https://purl.org/becyt/ford/2 |
| Sumario: | In this work an elastoplastic constitutive theory for unsaturated soils is presented. The proposed material model is formulated in the general framework of the thory of porous media and of the flow theory of plasticity. The model is based on an extension of the well-known MRS Lade model whereby the suction and the effective stress tensor are introduced as additional independent and dependent stress components, respectively. Consequently the cap and cone yield conditions of the MRS Lade model both in hardening and softening as well as the internal evolution laws in these regimes are redefined to include the dependency on the suction. The paper illustrates the predictive capability of the extended MRS Lade model for partially saturated soils. Finally, the condition for discontinuous bifurcation in elastoplastic partially saturated porous media as well as the localized failure predictions of the proposed material formulation for diferent suctions and stress states are also analyzed and discussed. |
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