Hydromechanical couplings in the clay matrix of argilite: some methodological aspects of the atomistic-to-continuum upscaling - École des Ponts ParisTech Access content directly
Conference Papers Year : 2015

Hydromechanical couplings in the clay matrix of argilite: some methodological aspects of the atomistic-to-continuum upscaling

Sébastien Brisard
Matthieu Vandamme
Benoît Carrier
  • Function : Author
  • PersonId : 919501
Linlin Wang
  • Function : Author
  • PersonId : 937406

Abstract

Clays are ubiquitous in civil engineering applications, from deep geological disposal of radioactive waste to petroleum engineering, all of which require a good knowledge of their mechanical properties. Swelling clays are highly sensitive to the relative humidity: increases of water content can induce significant volume increases, as well as variations of the elastic stiffness. A faithful description of the behavior of clayey materials must therefore account for the hydromechanical couplings within clays. Hydromechanical couplings within the clay matrix of argilite were investigated numerically following a multi-scale approach. At the smallest scale, the clay layers of Na-montmorillonite are characterized through Monte Carlo molecular simulations. The constitutive law of the particle (a stack of clay layers) is then derived through rheological models. Finally, the clay matrix is represented as a polycrystal made of clay particles and homogenized by means of numerical non-linear continuum mechanics methods. Throughout our investigations, it was realized that the atomistic-to-continuum scale transition raised non-trivial theoretical questions. In this poster, we propose to show how the output of molecular simulations can be rigorously fed into a continuum mechanics simulation. Although the issues raised in this poster are illustrated on the upscaling of Na-montmorillonite, they are of a methodological nature and have a much wider range of applications.
Fichier principal
Vignette du fichier
BRISARD_Sebastien-Euromech559.pdf (100.01 Ko) Télécharger le fichier
Origin Files produced by the author(s)
Loading...

Dates and versions

hal-01194708 , version 1 (07-09-2015)

Licence

Identifiers

  • HAL Id : hal-01194708 , version 1

Cite

Sébastien Brisard, Matthieu Vandamme, Benoît Carrier, Linlin Wang. Hydromechanical couplings in the clay matrix of argilite: some methodological aspects of the atomistic-to-continuum upscaling. Multi-scale computational methods for bridging scales in materials and structures (EuroMech Colloquium 559), EuroMech; Technische Universiteit Eindhoven; Université Paris-Est Marne-la-Vallée; University of Stuttgart, Feb 2015, Eindhoven, Netherlands. ⟨hal-01194708⟩
296 View
115 Download

Share

Gmail Mastodon Facebook X LinkedIn More