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Mechanical vibration and critical speeds of rotating composite laminate disks

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Abstract

Since fiber-reinforced composite materials have high-specific strength and stiffness values, their application to rotating disks can enhance machinery performance by increasing the dynamic stability and reducing driving energy. There have been few works on the vibration characteristics of rotating multidirectional laminated disks made of fiber-reinforced composite materials. Most of the previous studies have been confined to single lamina disks. When a disk rotates, the centrifugal force causes the in-plane loads to affect the vibration characteristics of the rotating disks. In this paper, the exact expressions for the in-plane loads acting on rotating cross-ply laminate disks are presented. The vibration equation of rotating cross-ply laminate disks was solved by using Galerkin’s method. Using numerical examples, the natural frequencies and critical speeds of the rotating disks are discussed for various cross-ply ratios.

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Acknowledgments

The author acknowledges that this work was supported by the University of Ulsan Research Fund of 2006.

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Authors and Affiliations

  1. Department of Aerospace Engineering, University of Ulsan, San 29, Mugeo-dong, Nam-gu, Ulsan, 680-749, South Korea

    Kyo-Nam Koo

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  1. Kyo-Nam Koo
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Correspondence to Kyo-Nam Koo.

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Koo, KN. Mechanical vibration and critical speeds of rotating composite laminate disks. Microsyst Technol 14, 799–807 (2008). https://doi.org/10.1007/s00542-007-0555-2

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  • DOI: https://doi.org/10.1007/s00542-007-0555-2

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