Multi-scale nonlinear elastic analysis of thin-walled members including local effects

CRC press/Balkema
Publication Type:
Conference Proceeding
From materials to structures: Advancement through innovation, 2012, pp. 169 - 174
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Thin-walled members that have one dimension relatively large in comparison to the crosssectional dimensions are usually modelled by using beam-column type finite element formulations. Beamcolumn elements however, are based on the assumption of rigid cross-section, thus they cannot consider the cross-sectional deformations such as local buckling and only allows considerations of the beam axis behaviour such as flexural or lateral-torsional buckling. Shell-type finite elements can be used to model the structure in order to consider these local deformation effects. Based on the Bridging multi-scale approach, this study proposes a numerical technique that is able to split the global analysis, which is performed by using simple beam-type elements, from the local analysis which is based on more sophisticated shell-type elements. As a result, the proposed multi-scale method allows the usage of shell elements in a local region to incorporate the local deformation effects on the overall behaviour of thin-walled members without necessitating a shell-type model for the whole member.
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