Identification under uncertainty of material properties of composite sandwich panels

S. Lacaze, Samy Missoum, F. Alijani, M. Amabili

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents an approach for the identification of material properties and the model calibration of composite sandwich panels. More specifically, this study focuses on the influence of spatial variability of the thickness due to the manufacturing process. The calibration is performed using a classification-based technique referred to as "fidelity maps", which has the ability to treat a large number of correlated responses to match. The material properties of the skin layers of a foam core sandwich panel are to be identified using modal data. In order to check the influence of geometric uncertainty, the thickness is first treated as spatially constant and added to the parameters to estimate. In a second stage a fixed thickness distribution is obtained from measurements. Finally, the thickness is treated as a random field whose features are characterized through proper orthogonal decomposition (POD). The results demonstrate that calibration results might be highly sensitive to uncertainty in the thickness distribution.

Original languageEnglish (US)
Title of host publicationProceedings of the American Society for Composites - 29th Technical Conference, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting
PublisherDEStech Publications
ISBN (Print)9781605951249
StatePublished - 2014
Event29th Annual Technical Conference of the American Society for Composites, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting - La Jolla, San Diego, United States
Duration: Sep 8 2014Sep 10 2014

Other

Other29th Annual Technical Conference of the American Society for Composites, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting
CountryUnited States
CityLa Jolla, San Diego
Period9/8/149/10/14

ASJC Scopus subject areas

  • Ceramics and Composites

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    Lacaze, S., Missoum, S., Alijani, F., & Amabili, M. (2014). Identification under uncertainty of material properties of composite sandwich panels. In Proceedings of the American Society for Composites - 29th Technical Conference, ASC 2014; 16th US-Japan Conference on Composite Materials; ASTM-D30 Meeting DEStech Publications.