V. De Groof, M. Oberguggenberger, H. Haller, R. Degenhardt, A. Kling

Large scatter characterizes the collapse load of thin-walled structures due to their imperfection sensitivity. Random fields can be used to include imperfections in a finite element model. Principal component analysis and analytical covariance functions are matched to available correlation information of geometrical imperfection measurements. The results of the different covariance models are compared with the deterministic collapse loads of the measured imperfections in the FE-model. This approach isolates the effect of the different covariance models from other inaccuracies such as boundary conditions, loading imperfections, etc. and thus admits a realistic assessment of their usability and accuracy.

Deutscher Luft- und Raumfahrtkongress 2012, Berlin

Conference Paper

englisch

imperfection sensitivity, random field models, finite element models, comparative simulations

J. Eberhardsteiner, H.J. Böhm, F.G. Rammerstorfer (Eds.), CD-ROM Proceedings of the 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012), Vienna University of Technology, Wien 2012

Vienna University of Technology, Wien, 2012

978-3-9502481-9-7

externe Resource

14.11.2012