Iterative global-local methods to consider the local deformation effects in the analysis of thin-walled beams

Publication Type:
Thesis
Issue Date:
2016
Full metadata record
Files in This Item:
Filename Description Size
01front.pdf126.27 kB
Adobe PDF
02whole.pdf5.8 MB
Adobe PDF
Thin walled members are one of the most widely used structural elements in modern structures. Beam-type finite elements, which are conventionally used to model these members, cannot capture cross-sectional deformation. On the other hand, the use of two-dimensional shell-type elements leads to computationally uneconomical models that cannot be adopted for common engineering practice. The aim of this study is to develop a numerical method to incorporate the effect of local deformation on the global response of a thin-walled beam. For this purpose, the Iterative Global-local Method is developed in which beam elements are used as the global model while two-dimensional shell elements are placed at critical regions to constitute the local model. The two models are synchronised within each computational iteration via a kinematically appropriate mathematical link. The Iterative Global-local Method is developed for elastic and elasto-plastic material response, for fibre-reinforced composite laminates, for pipes and curved thin-walled members. The accuracy and efficiency verification of the method is verified through comparisons with detailed finite element modelling and test data from the literature.
Please use this identifier to cite or link to this item: