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Fakulteta za gradbeništvo in geodezijo, Ljubljana (FGGLJ)
  • Hybrid-mixed shell finite elements and implicit dynamic schemes for shell post-buckling
    Lavrenčič, Marko, 1992- ; Brank, Boštjan
    Two topics are addressed: (i) hybrid-mixed formulations for geometrically exact shell models, and (ii) post-buckling analysis of shells by implicit dynamics schemes. As for the hybrid-mixed elements, ... seven formulations are compared. The one with the assumed-natural-strain interpolation of membrane strains shows very little sensitivity to mesh distortion for curved shells. Another one, which is based on the Hu-Washizu three-field functional, allows for very large solution increments. Hence, a new element is proposed that combines positive features of both mentioned formulations. As for the post-buckling analysis of shells, we use implicit dynamics. In particular, five time-stepping schemes are tested for shell stability problems that include mode jumping. These are trapezoidal rule, schemes with numerical dissipation in the high-frequency range, and energy-momentum conserving method. Numerical examples show that the dissipative schemes are suitable for simulation of complex phenomena that appear in shell stability.
    Vir: Recent developments in the theory of shells (str. 383-412)
    Vrsta gradiva - članek, sestavni del
    Leto - 2019
    Jezik - angleški
    COBISS.SI-ID - 8908641
    DOI

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