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  4. Stabilized Mixed Finite Element Formulations for Materially Nonlinear Partially Saturated Media
 
conference paper

Stabilized Mixed Finite Element Formulations for Materially Nonlinear Partially Saturated Media

Truty, A.
•
Zimmermann, Th.  
2006
Computer methods in applied mechanics and engineering
Symposium organized to honour Prof. T.J.R. Hughes on his 60th Anniversary

Standard and enhanced (BBAR or EAS) low order finite elements applied to the problem of consolidation of two-phase nonlinear continua do not satisfy the LBB condition when the same interpolation functions are used for both displacement and pore pressure fields. Strong spatial pressure oscillations are the main consequence of the LBB condition violation. The class of direct stabilized methods, widely used in the field of fluid mechanics, is a powerful tool to circumvent violation of the aforementioned condition. Three stabilized formulations, designed for the problem of consolidation of fully or partially saturated media are presented: Galerkin/least-squares (GLS) with the least-squares term construction based on the residuum of the local fluid mass conservation equation; the pressure stabilized formulation (FPL) in which the rate of the pore pressure Laplacian (residual free in the incompressibility limit) is added to the fluid mass conservation equation; and, finally, a stabilized formulation in which the stabilization term is constructed based on the rate of the residuum of the local momentum equation. An h-convergence study and test problems for the three stabilized schemes are discussed.

  • Details
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Type
conference paper
DOI
10.1016/j.cma.2005.05.044
Author(s)
Truty, A.
Zimmermann, Th.  
Date Issued

2006

Published in
Computer methods in applied mechanics and engineering
Volume

195

Issue

13-16

Start page

1517

End page

1546

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSC  
Event nameEvent placeEvent date
Symposium organized to honour Prof. T.J.R. Hughes on his 60th Anniversary

Houston USA

April 2004

Available on Infoscience
April 23, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/5276
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