Virtual testing of post-buckling behaviour of metallic stiffened panel

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dc.contributor.advisor Campbell, James Wang, Yang 2012-06-27T11:14:24Z 2012-06-27T11:14:24Z 2011-12
dc.description.abstract The aim of the project presented in this thesis is to demonstrate a modelling method for predicting the variability in the ultimate load of stiffened panel under axial compression due to manufacturing variability. Bulking is sensitive to imperfections. In the case of a post-buckled panel, manu-facturing variability produces a scatter in the ultimate load. Thus, reasonable leeway for imperfections and inherent variability must be allowed in their design. Firstly, a finite element model of a particular stiffened panel was developed, and all nonlinearities within the material, boundary condition and geometry were considered. Verification and validation were performed to examine the accuracy of the buckling behaviour prediction, especially ultimate load. Experiments on 5 identical panels in design were performed to determine the level of panel-panel variation in geometry and collapse load. A data reduction programme based on the practical geometry scanning was developed, in addi-tion to which, the procedure of importing measured imperfection into Finite Ele-ment model was introduced. To identify and apply representative imperfections to the panel model, a double Fourier series representation of the random geometric distributions is attempt-ed, and was used thereby to derive a series of shapes representing random ge-ometry scatters. With these newly generated geometric imperfections, the variation in collapse load was determined, using the validated FE analysis. And also, the probability of these predicted loads was generalized. en_UK
dc.language.iso en en_UK
dc.publisher Cranfield University en_UK
dc.rights © Cranfield University 2011. All rights reserved. No part of this pub-lication may be reproduced without the written permission of the copyright owner en_UK
dc.subject Buckling and Postbuckling en_UK
dc.subject Stiffened panel en_UK
dc.subject Geometric Imperfection en_UK
dc.subject FE method en_UK
dc.subject ABAQUS en_UK
dc.subject FE modelling en_UK
dc.subject Compression en_UK
dc.title Virtual testing of post-buckling behaviour of metallic stiffened panel en_UK
dc.type Thesis or dissertation en_UK
dc.type.qualificationlevel Masters en_UK
dc.type.qualificationname MSc by Research en_UK

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