On the modeling of thin-walled member assemblies combining shell and gbt-based beam finite elements: The linear and bifurcation case

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Abstract

In this paper, a general and efficient approach to model thin-walled members and frames with complex geometries (including tapered segments and holes). The approach combines shell and GBT-based (beam) finite elements, using each of them where it is most efficient: (i) shell elements in the plastic and geometrically complex zones, and (ii) GBT elements in the prismatic and elastic zones. To illustrate the capabilities and potential of the proposed approach, a set of numerical examples are presented, concerning linear, bifurcation (linear stability) and first-order plastic zone analyses. The examples analysed involve (i) members with tapered segments, (ii) members with holes and (iii) tapered beam-column assemblies. For validation and comparison purposes, full shell finite element solutions are provided and it is demonstrated that the proposed approach yields very accurate solutions in all cases, while involving much less DOFs.

Original languageEnglish
JournalWorld Congress in Computational Mechanics and ECCOMAS Congress
Volume900
DOIs
Publication statusPublished - 11 Mar 2021
Event14th World Congress of Computational Mechanics and ECCOMAS Congress, WCCM-ECCOMAS 2020 - Virtual, Online
Duration: 11 Jan 202115 Jan 2021

Keywords

  • Cross-section deformation
  • Generalised Beam Theory (GBT)
  • Local-distortional-global buckling
  • Shell finite elements

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