International Journal for Multiscale Computational Engineering

ISSN for PRINT: 1543-1649

For Online Access

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2004, Volume2

Issue 3

180 pages

DOI: 10.1615/IntJMultCompEng.v2.i3

Issue price - $178.00

Lingfu Zeng
AF Energy and Environment Ltd., SE-40515 Goteborg, Sweden

Nils-Erik Wiberg
Department of Structural Mechanics, Chalmers University of Technology, S-41296 Goteborg, Sweden

This article concerns finite element modeling of a coupled thermo-hydro-mechanical process in porous media. In the article, governing differential equations for such a coupled problem of multiphases are reviewed, and a fully coupled semi-discrete finite element formulation is derived in a three-dimensional setting. Based on the fully coupled formulation, sequential partitioned finite element analysis procedures are studied for situations when the coupling effects are relatively small and approximations can be made to decouple the phase interaction. Thereafter, material modeling of mechanical behavior is studied in the framework of viscoplasticity, and a heuristic approach to modeling the thermal effect in a viscoplastic solid is discussed in terms of pressure-sensitive (for instance, Ducker—Prager and Mohr—Coulomb) yield surfaces. The coupled finite modeling technique has currently been applied in two important areas: the geological disposal of nuclear wastes and highway engineering (or road mechanics), and in this article we demonstrate such an industrial application with a numerical example.

DOI: 10.1615/IntJMultCompEng.v2.i3.90 Download article, 18 pages

Article price - $35.00

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