RECOMMENDATIONS FOR FE MODELLING OF PLATE BUCKLING

Abstract For thin‐walled components loaded in the plane of the plate, verification of stability regarding plate buckling must be carried out. The verification procedure is governed by EN 1993‐1‐5. In this, buckling verification can occur using formulae or via an FE analysis. Currently, amongst other options, it is usual that the critical load amplifier, α cr , for stiffened buckling plates is determined using FE software. Alternatively, a complete structural safety analysis can be carried out by means of a geometrically and materially non‐linear analysis with consideration of imperfections (GMNIA). In EN 1993‐1‐5 Annex C and in prEN 1993‐1‐14, fundamental information for the modelling and verification process using FE software can be found. Here, it is indicated that the user must possess precise knowledge regarding material models, element definition, edge support, load application, calculation procedures and imperfections. In the standards, however, comprehensive information is provided on certain topics, while for others, only a few guidelines can be found. In these, the influence of individual modelling variants on the determination of ultimate load is not obvious. In this publication, clear operational recommendations are presented to the user along with additional guidelines for the modelling of plate buckling.