From local to global importance measures of uncertainty propagation in composite structures

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Carlos Conceicão António (Author) FEUP; Luísa N. Hoffbauer (Author) Other

Journal

Title: Composite Structures

Vol. 85 No. 3

Pages: 213-225

ISSN: 0263-8223

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 43 Citations

Scopus - 51 Citations

INSPEC

Other information

Authenticus ID: P-003-VPJ

DOI: 10.1016/j.compstruct.2007.10.012

Abstract (EN): The influence of uncertainties of input parameters on output response of composite structures is investigated in this paper. In particular, the effects of deviations in mechanical properties, ply angles, ply thickness and on applied loads are studied. The uncertainty propagation and the importance measure of input parameters are analysed using three different approaches: a first-order local method, a Global Sensitivity Analysis (GSA) supported by a variance-based method and an extension of local variance to estimate the global variance over the domain of inputs. Sample results are shown for a shell composite laminated structure built with different composite systems including multi-materials. The importance measures of input parameters on structural response based oil numerical results are established and discussed as a function of the anisotropy of composite materials. Needs for global variance methods are discussed by comparing the results obtained from different proposed methodologies. The objective of this paper is to contribute for the use of GSA techniques together with low expensive local importance measures.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13