Identification of material properties of composite sandwich panels under geometric uncertainty

Samy Missoum, Sylvain Lacaze, Marco Amabili, Farbod Alijani

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

This study deals with the influence of manufacturing-induced geometric variability on the identification of material properties of composite sandwich panels. The objective of this article is twofold. First, this work aims to demonstrate the marked influence of geometric uncertainties on a foam core sandwich panel whose skin material properties need to be identified. Several identification cases are studied based on experimentally obtained natural frequencies and mode shapes. The second objective is to propose a numerical method for the identification process in the case where uncertainties can be treated as a random field (e.g., thickness distribution). The identification method is built around a classification-based technique referred to as “fidelity maps”, which has the ability to simultaneously treat several responses to match without any assumption on their correlation. The approach uses a proper orthogonal decomposition for the extraction and the selection of the features of the random field considered as important for the identification. The identification method is demonstrated on a foam core sandwich panel whose thickness distribution is modeled as a random field.

Original languageEnglish (US)
Pages (from-to)695-704
Number of pages10
JournalComposite Structures
Volume179
DOIs
StatePublished - Nov 1 2017

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Foams
Materials properties
Composite materials
Natural frequencies
Numerical methods
Skin
Decomposition
Uncertainty

Keywords

  • Composite sandwich panels
  • Identification
  • Random fields
  • Uncertainty

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

Cite this

Identification of material properties of composite sandwich panels under geometric uncertainty. / Missoum, Samy; Lacaze, Sylvain; Amabili, Marco; Alijani, Farbod.

In: Composite Structures, Vol. 179, 01.11.2017, p. 695-704.

Research output: Contribution to journalArticle

Missoum, Samy ; Lacaze, Sylvain ; Amabili, Marco ; Alijani, Farbod. / Identification of material properties of composite sandwich panels under geometric uncertainty. In: Composite Structures. 2017 ; Vol. 179. pp. 695-704.
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