Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3855
Título: Uncertainty analysis based on sensitivity applied to angle-ply composite structures
Autor: António, Carlos Conceição
Hoffbauer, Luísa N.
Palavras-chave: Uncertainty propagation
Sensitivity analysis
First-order analysis
Angle-ply composites
Data: 2007
Editora: Elsevier
Relatório da Série N.º: Reliability Engineering and System Safety; Vol. 92, Issue 10
Resumo: 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.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3855
ISSN: 0951-8320
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0951832006001967
Aparece nas colecções:ISEP – DMA – Artigos

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