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Uncertainty analysis based on sensitivity applied to angle-ply composite structures

Title
Uncertainty analysis based on sensitivity applied to angle-ply composite structures
Type
Article in International Scientific Journal
Year
2007
Authors
Luísa N. Hoffbauer
(Author)
Other
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Journal
Vol. 92 No. 10
Pages: 1353-1362
ISSN: 0951-8320
Publisher: Elsevier
Other information
Authenticus ID: P-004-7BT
Abstract (EN): This article describes a finite element-based formulation for the statistical analysis of the response of stochastic structural composite systems whose material properties are described by random fields. A first-order technique is used to obtain the second-order statistics for the structural response considering means and variances of the displacement and stress fields of plate or shell composite structures. Propagation of uncertainties depends on sensitivities taken as measurement of variation effects. The adjoint variable method is used to obtain the sensitivity matrix. This method is appropriated for composite structures due to the large number of random input parameters. Dominant effects on the stochastic characteristics are studied analyzing the influence of different random parameters. In particular, a study of the anisotropy influence on uncertainties propagation of angle-ply composites is carried out based on the proposed approach.
Language: English
Type (Professor's evaluation): Scientific
Contact: cantonio@fe.up.pt; lnh@isep.ipp.pt
No. of pages: 10
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