Hybrid-Trefftz displacement element for poroelastic media

J. A.Teixeira de Freitas*, I. D. Moldovan, C. Cismaşiu

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)


    The elastodynamic response of saturated poroelastic media is modelled approximating independently the solid and seepage displacements in the domain and the force and pressure components on the boundary of the element. The domain and boundary approximation bases are used to enforce on average the dynamic equilibrium and the displacement continuity conditions, respectively. The resulting solving system is Hermitian, except for the damping term, and its coefficients are defined by boundary integral expressions as a Trefftz basis is used to set up the domain approximation. This basis is taken from the solution set of the governing differential equation and models the free-field elastodynamic response of the medium. This option justifies the relatively high levels of performance that are illustrated with the time domain analysis of unbounded domains.

    Original languageEnglish
    Pages (from-to)659-673
    Number of pages15
    JournalComputational Mechanics
    Issue number6
    Publication statusPublished - Dec 2011


    • Absorbing boundaries
    • Displacement elements
    • Hybrid-Trefftz elements
    • Poroelastic media


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