A viscoplastic constitutive model for unsaturated geomaterials
| Autor: | V. De Gennaro, Jean-Michel Pereira |
|---|---|
| Přispěvatelé: | Schlumberger, Pau, France, affiliation inconnue, Laboratoire Navier (navier umr 8205), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS), Géotechnique (cermes), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Suction Viscoplasticity Constitutive equation 0211 other engineering and technologies 02 engineering and technology Strain rate Strain hardening exponent 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences [SPI.MAT]Engineering Sciences [physics]/Materials Computer Science Applications Stress (mechanics) Creep Geotechnical engineering 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Computers and Geotechnics Computers and Geotechnics, Elsevier, 2013, 54 (-), pp.143-151. ⟨10.1016/j.compgeo.2013.06.005⟩ |
| ISSN: | 0266-352X 1873-7633 |
| DOI: | 10.1016/j.compgeo.2013.06.005 |
| Popis: | International audience; In this paper a viscoplastic constitutive model for unsaturated geomaterials is presented. The constitutive laws for the description of the time-dependent mechanical behaviour of saturated and unsaturated geomaterials generalise the isotach approach proposed by uklje [52] to the elastoplastic strain hardening based constitutive laws for unsaturated soils. The formulation encompasses strain rate effects and allows the description of the coupled effect of strain rate and suction on the viscoplastic behaviour of geomaterials. The model has been used to simulate tests involving variable stress and/or strain rate conditions, including creep phases and soaking tests. Numerical results demonstrate its reliability in reproducing the general features of the rate-dependent behaviour together with the dependency upon suction. Further tests are currently under consideration to extend model verification to others saturated and unsaturated geomaterials. © 2013 Elsevier Ltd. |
| Databáze: | OpenAIRE |
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