The bond strength of SPS (Sandwich) panels was investigated under combined shear and normal load. Tests show that the shear capacity decreases with increasing tension load and increases with compressive load. The failure criterion derived from the test series can be used for the design of safe SPS structures capable to withstand normal operating loads. The paper discussses different techniques fpr the finite-element modeling of the debonding process. Specimen preparation, test set-up and test results are discussed in detail. Further finite-element simulation of the bond tests are described including material model and load cases. The mesh dependency of peel process, the delamination criterion, the finite-element modeling of debonding and nodal release techniques are explained. The finite-element model took the elastic-plyastic behaviour of core material in account. The debonding process was simulated by means of cohesive zone elements.


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    Title :

    Bond strength of SPS panels - Failure criterion and finite-element modelling


    Additional title:

    Bindungsfestigkeit von Sandwichplattenfeldern - Ausfallkriterium und Finite-Elemente-Modellierung


    Contributors:

    Published in:

    Publication date :

    2008


    Size :

    17 Seiten, 21 Bilder, 4 Tabellen, 14 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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