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Advisor(s)
Abstract(s)
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.
Description
Keywords
Uncertainty Composite structures Local importance measure Global variance-based Global approach
Citation
Publisher
Elsevier