Numerical Modeling of Multiphysics Couplings and Strain Localization
| Autor: | Panagiotis Kotronis, Frédéric Collin, Benoît Pardoen |
|---|---|
| Přispěvatelé: | Université de Liège, Institut de Recherche en Génie Civil et Mécanique (GeM), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Université Laval [Québec] (ULaval), Ioannis Stefanou, Jean Sulem |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Strain (chemistry) [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Multiphysics [SPI.GCIV.GEOTECH]Engineering Sciences [physics]/Civil Engineering/Géotechnique 0211 other engineering and technologies Numerical modeling 02 engineering and technology Mechanics [SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph] 01 natural sciences Computational physics 010101 applied mathematics 0101 mathematics 021101 geological & geomatics engineering |
| Zdroj: | Instabilities Modeling in Geomechanics Ioannis Stefanou; Jean Sulem. Instabilities Modeling in Geomechanics, Wiley, pp.203-251, 2021, 9781789450002. ⟨10.1002/9781119755203.ch7⟩ |
| Popis: | International audience; This chapter summarizes the main observations on localized phenomena and proposes numerical tools to characterize localization processes. To deal with interactions occurring between the different phases of porous media, a regularization technique based on the second gradient model has been extended to multiphysic couplings. The chapter describes the regularization methods used to properly model the strain localization process. It presents the description of the coupled second gradient model in saturated conditions. A biaxial compression test is modeled in order to show the ability of the second gradient model to correctly represent the post‐peak behavior. The second gradient model is extended to unsaturated conditions. The coupled local second gradient model is developed for enriched continua including microstructure effects. The example of a gallery excavation is proposed to evidence the influence of hydromechanical couplings in saturated and unsaturated conditions on the strain localization process. |
| Databáze: | OpenAIRE |
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