Abstract The problem of honeycomb sandwich structures with moisture ingression can be avoided by replacing the honeycombs through chevron-folded cores. The application to real aircraft components often requires wedge-shaped sandwich. With folded cores, this kind of geometric shape can be obtained only by special folding schemes which have a significant influence on the mechanical performance. A comprehensive experimental investigation of the relation between folding geometry and structural properties of wedge-shaped folded cores (WSFC) is very time consuming and expensive. Therefore, a procedure based on numerical methods has been developed to predict the structural response of this kind of cores under compressive and shear loading. The approach is based on a numerical tool that provides finite element models of arbitrary WSFC as well as the explicit finite element solver LS-DYNA for simulation. These tools were applied to investigate the influence of the inner core geometry and different materials on the mechanical properties of WSFC structures. To verify these results, a test programme was conducted. Test samples were manufactured using a newly developed folding process. Also special test devices to determine the compression and shear properties of the WSFC specimens were developed. The achieved test results show a good agreement with the behaviour predicted by simulation.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Wedge-shaped folded sandwich cores for aircraft applications: from design and manufacturing process to experimental structure validation


    Beteiligte:
    Hähnel, Falk (Autor:in) / Wolf, Klaus (Autor:in) / Hauffe, Andreas (Autor:in) / Alekseev, Kirill A. (Autor:in) / Zakirov, Il’dus M. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2011




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch



    Klassifikation :

    BKL:    50.03 Methoden und Techniken der Ingenieurwissenschaften / 50.03 Methoden und Techniken der Ingenieurwissenschaften, Methoden und Techniken der Ingenieurwissenschaften / 55.50 Luftfahrzeugtechnik / 55.50 Luftfahrzeugtechnik, Luftfahrzeugtechnik
    DDC:    629.105




    Geometrical model of creasing roll for manufacturing line of the wedge-shaped folded cores production

    Alekseev, K. A. / Zakirov, I. M. / Karimova, G. G. | Springer Verlag | 2011


    Geometrical model of creasing roll for manufacturing line of the wedge-shaped folded cores production

    Alekseev, K. A. / Zakirov, I. M. / Karimova, G. G. | Online Contents | 2011


    Modelling the impact behaviour of sandwich structures with folded composite cores

    Kilchert, S. / Johnson, A.F. / Voggenreiter, H. | Tema Archiv | 2014