Mechanical behaviour of cellular core for structural sandwich panels |
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| Affiliation: | 1. School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Department of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033, China;3. School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;1. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China;2. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia;1. Institute of Applied Mechanics of Russian Academy of Science, Leningradsky prt 7, Moscow 125040, Russia;2. Dorodnicyn Computing Center of Russian Academy of Science, Russia;3. Moscow Aviational Institute, Russia;4. All-Russian Research Institute of Aviation Materials, Russia;5. Novgorod State Technical Univercity Named After R. E. Alekseev, Russia;1. College of Mechanics and Materials, Hohai University, Nanjing 210098, China;2. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | This paper deals with the analysis of the mechanical properties of the core materials for sandwich panels. In this work, the core is firstly a honeycomb and secondly tubular structure. This kind of core materials are extensively used, notably in automotive construction (structural components, load floors...). For this study, three approaches are developed: a finite element analysis, an analytical study and experimental tests. Structural members made up of two stiffs, strong skins separated by a lightweight core (foam, honeycomb, tube...) are known as sandwich panels. The separation of the skins by the core increases the inertia of the sandwich panel, the flexure and shear stiffness. This increase is obtained with a little increase in weight, producing an efficient structure to resist bending and buckling loads. A new analytical method to analyse sandwich panels core will be presented. These approaches (theoretical and experimental) are used to determine elastic properties and ultimate stress. A parameter study is carried out to determine elastic properties as a function of geometrical and mechanical characteristics of basic material. Both theoretical and experimental results are discussed and a good correlation between them is obtained. |
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