STP546

    A Correlation Study of Finite-Element Modeling for Vibrations of Composite Material Panels

    Published: Jan 1974


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    Abstract

    A correlation study has been made to evaluate the effectiveness of finite-element modeling for vibrations of composite material panels. The three types of composite material panels studied were: (1) Symmetrically laminated cross-ply panels, (2) unsymmetrically laminated cross-ply panels, and (3) a 1/6-scale sandwich wing model. Correlations of finite-element predictions for frequencies and vibration modes were made with Rayleigh-Ritz analyses and experimental data.

    For the symmetrically laminated panels the finite-element representation predicted vibration modes very accurately. For the unsymmetrically laminated panels it was found that predictions using uncoupled finite-element plate bending elements did not give good agreement with experimental data. The constant-chord, swept-wing model was effectively analyzed by finite-element presentations using either sandwich elements or ribs and spars.

    Keywords:

    composite materials, laminates, orthotropism, vibration, resonant frequency, vibration, mode (statistics), nodes (standing waves), finite elements


    Author Information:

    Thornton, EA
    Associate professor, Old Dominion University, Norfolk, Va.

    Clary, RR
    Aerospace engineer, NASA Langley Research Center, Hampton, Va.


    Paper ID: STP35485S

    Committee/Subcommittee: D30.04

    DOI: 10.1520/STP35485S


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