Loading...

Fully coupled hydromechanical multiscale model with microdynamic effects

Khoei, A. R ; Sharif University of Technology | 2018

694 Viewed
  1. Type of Document: Article
  2. DOI: 10.1002/nme.5805
  3. Publisher: John Wiley and Sons Ltd , 2018
  4. Abstract:
  5. In this paper, a multiscale finite element framework is developed based on the first-order homogenization method for fully coupled saturated porous media using an extension of the Hill-Mandel theory in the presence of microdynamic effects. The multiscale method is employed for the consolidation problem of a 2-dimensional saturated soil medium generated from the periodic arrangement of circular particles embedded in a square matrix, which is compared with the direct numerical simulation method. The effects of various issues, including the boundary conditions, size effects, particle arrangements, and the integral domain constraints for the microscale boundary value problem, are numerically investigated to illustrate the performance of a representative volume element in the proposed computational homogenization method of fully coupled saturated porous media. This study is aimed to clarify the effect of scale separation and size dependence, and to introduce characteristics of a proper representative volume element in multiscale modeling of saturated porous media. Copyright © 2018 John Wiley & Sons, Ltd
  6. Keywords:
  7. Multiscale model ; Boundary value problems ; Computation theory ; Homogenization method ; Numerical methods ; Porous materials ; Size separation ; Surface morphology ; Volume measurement ; Computational homogenization ; Microdynamic effects ; Multi-scale Modeling ; Multiscale finite element ; Multiscale method ; Particle arrangements ; Representative volume element (RVE) ; Saturated porous media ; Finite element method
  8. Source: International Journal for Numerical Methods in Engineering ; Volume 115, Issue 3 , 2018 , Pages 293-327 ; 00295981 (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/10.1002/nme.5805