Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3857
Título: From local to global importance measures of uncertainty propagation in composite structures
Autor: António, Carlos Conceição
Hoffbauer, Luisa N.
Palavras-chave: Uncertainty
Composite structures
Local importance measure
Global variance-based
Global approach
Data: 2008
Editora: Elsevier
Relatório da Série N.º: Composite Structures; Vol.85, Issue 3
Resumo: 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 on 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.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3857
ISSN: 0263-8223
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0263822307002553
Aparece nas colecções:ISEP – DMA – Artigos

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