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J. Compos. Sci. 2018, 2(1), 6; https://doi.org/10.3390/jcs2010006

Assessing Static and Dynamic Response Variability due to Parametric Uncertainty on Fibre-Reinforced Composites

1
Grupo de Investigação em Modelação e Optimização de Sistemas Multifuncionais (GI-MOSM), Instituto Superior de Engenharia de Lisboa, CEMAPRE, ISEG, Universidade de Lisboa, 1200-781 Lisboa, Portugal
2
Grupo de Investigação em Modelação e Optimização de Sistemas Multifuncionais (GI-MOSM), NOVA UNIDEMI, Faculdade de Ciência e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
3
Grupo de Investigação em Modelação e Optimização de Sistemas Multifuncionais (GI-MOSM), IDMEC-Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Received: 31 December 2017 / Revised: 25 January 2018 / Accepted: 26 January 2018 / Published: 1 February 2018
(This article belongs to the Special Issue Advanced Composite Materials Applied to Structural Mechanics)
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Abstract

Composite structures are known for their ability to be tailored according to specific operating requisites. Therefore, when modelling these types of structures or components, it is important to account for their response variability, which is mainly due to significant parametric uncertainty compared to traditional materials. The possibility of manufacturing a material according to certain needs provides greater flexibility in design but it also introduces additional sources of uncertainty. Regardless of the origin of the material and/or geometrical variabilities, they will influence the structural responses. Therefore, it is important to anticipate and quantify these uncertainties as much as possible. With the present work, we intend to assess the influence of uncertain material and geometrical parameters on the responses of composite structures. Behind this characterization, linear static and free vibration analyses are performed considering that several material properties, the thickness of each layer and the fibre orientation angles are deemed to be uncertain. In this study, multivariable linear regression models are used to model the maximum transverse deflection and fundamental frequency for a given set of plates, aiming at characterizing the contribution of each modelling parameter to the explanation of the response variability. A set of simulations and numerical results are presented and discussed. View Full-Text
Keywords: response variability of composites; parametric uncertainty characterization; multivariable linear regression models; composite laminates; static and free vibration analysis response variability of composites; parametric uncertainty characterization; multivariable linear regression models; composite laminates; static and free vibration analysis
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Carvalho, A.; Silva, T.A.; Loja, M.A. Assessing Static and Dynamic Response Variability due to Parametric Uncertainty on Fibre-Reinforced Composites. J. Compos. Sci. 2018, 2, 6.

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