Dynamic instability of three-layered cylindrical shells containing an FGM interlayer |
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Affiliation: | 1. Department of Mechanical Engineering, University of Tabriz, 29 Bahman Blvd., PO Box 5166616471, Tabriz, Iran;2. Department of Mathematics & Computer Science, Amirkabir University of Technology, 424 Hafez Ave., PO Box 158754413, Tehran, Iran;1. Methodist University of Piracicaba, R. Luis Ometto, Km 24, Sta. Bárbara d''Oeste, SP, Brazil;2. Oriente University, Santiago de Cuba, Cuba;3. Federal University of Uberlândia, MG, Brazil |
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Abstract: | In this study, the dynamic instability of three-layered cylindrical shells containing a functionally graded (FG) interlayer subjected to static and time dependent periodic axial compressive loads are investigated. The governing relations, modified Donnell type dynamic stability and deformation compatibility equations are derived. The governing equations are reduced Mathieu–Hill equation by using Galerkin?s method and the expressions for boundaries of unstable regions of three-layered cylindrical shell with an FG interlayer are found. Finally, the effects of variations of volume fractions of FG interlayer and shell characteristics on the magnitudes of boundaries of unstable regions are studied numerically. |
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Keywords: | FGM interlayer Three-layered cylindrical shells Dynamic instability Unstable region Time dependent periodic axial load |
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