Hail impaction may cause multiple-site damage to sandwich panels used as a part of control surfaces and is therefore a major maintenance and repair concern for the airlines. A strength analysis of the damaged sandwich panels is essential to predict the influence of the multi-site damage, which is necessary for establishing allowable damage limits. The location of the damage sites in relation to each other and their size influence the stress field significantly. This study presents an analytical method to determine the stress distribution in sandwich panels with arbitrary located damage, that is elliptical or circular shape. The validity of this method is established by comparison against the three-dimensional finite element models of sandwich panels with multiple damage zones. The comparison proves that the present technique captures the stress concentration in inter-indentation zones with acceptable accuracy for distances between the indentations as small as 15.0 % of the indentation diameter.


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    Title :

    Analysis of sandwich panels with multiple-site damage


    Additional title:

    Analyse von Sandwich-Verkleidungen mit örtlich verteilter Schädigung


    Contributors:
    Razi, H. (author) / Sergeev, B. (author) / Shkarayev, S. (author) / Madenci, E. (author)

    Published in:

    Publication date :

    1999


    Size :

    14 Seiten, 9 Bilder, 5 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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