To investigate the large amplitude free flexural vibration of doubly curved shallow shells in the presence of cutouts.

    Design/methodology/approach

    Finite element model using an eight-noded C0 continuity, isoparametric quadrilateral element is employed. Nonlinear strains of von Karman type are incorporated into the first-order shear deformation theory.

    Findings

    Cylindrical shell shows mostly hard spring behavior whereas spherical shell shows both hard spring and soft spring behavior with the increase of amplitude ratios for different cutout sizes, radii of curvature and thickness parameters. At a particular value of the amplitude ratio, the frequency ratio of shells is governed by the interactive effects of stiffness and mass.

    Practical implications

    Aircraft, spacecraft and many other structures where shell panels are used, undergo large amplitude nonlinear vibrations.

    Originality/value

    The paper will assist researchers of vibration behavior of elastic systems.


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    Title :

    Large amplitude free vibration of laminated composite shells with cutout


    Contributors:

    Published in:

    Publication date :

    2008-03-21


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






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