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International Journal of Aerospace Engineering
Volume 2016, Article ID 7971435, 9 pages
Research Article

Flutter Characteristic Study of Composite Sandwich Panel with Functionally Graded Foam Core

1School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China
2School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China

Received 3 May 2016; Accepted 10 October 2016

Academic Editor: Hikmat Asadov

Copyright © 2016 Peng Jin and Xiaoping Zhong. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper attempts to investigate the flutter characteristic of sandwich panel composed of laminated facesheets and a functionally graded foam core. The macroscopic properties of the foam core change continuously along this direction parallel to the facesheet lamina. The model used in the study is a simple sandwich panel-wing clamped at the root, with three simple types of grading strategies for FGM core: linear grading strategy in the chord-wise direction, linear grading strategy in the span-wise direction, and bilinear grading of properties of foam core across the panel. The results show that use of FGM core has the potential to increase the flutter speed of the sandwich panel. Finally, a minimum weight design of composite sandwich panel with lamination parameters of facesheet and density distribution of foam core as design variables is conducted using particle swarm optimization (PSO).