For the BK 117 helicopter a composite fuselage was designed, manufactured, and will be flight tested at MBB. Within the development program evidence was given to the crashworthy design of the fuselage which was accomplished by a joint activity between MBB and DFLVR Stuttgart. The crash investigations were focused on the lower airframe section under vertical crash loads. The task was performed by design support tests on the specimen level and by subcomponent crush testing. Sandwich panel specimens were statically and dynamically crushed to study various crush initiators at the panel-skin intersections, and to investigate the energy absorption capability. Subcomponent crush tests under quasi-static loading were concentrated on structural node points (intersections of keel beams and bulkheads) and on bulkheads located in the rear of the fuselage. The component's crush characteristics and the energy absorption performance were determined. Various designs with notched corners at the intersections of beams and bulkheads were considered with the aim to reduce the initial peak failure loads. Structural elements supporting the parallel panels of the landing skid frames were used to avoid global buckling and to initiate and stabilize efficient energy absorption crush modes. The generated load-deflection characteristics of the subcomponents are intended to be used as inputs for crash simulation calculations.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Crash Investigations with Sub-Components of a Composite Helicopter Lower Airplane Section


    Beteiligte:
    C. Kindervater (Autor:in) / A. Gietl (Autor:in) / R. Mueller (Autor:in)

    Erscheinungsdatum :

    1988


    Format / Umfang :

    18 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch





    Crash Analysis and Correlation with Experiment of Composite Helicopter Components

    Anghileri, M. | British Library Conference Proceedings | 1995


    Surviving an Airplane Crash

    Guice-Williams, P. / Southern California Safety Institute Inc / United States; Federal Aviation Administration et al. | British Library Conference Proceedings | 1994


    Crash Impact Characteristics of Helicopter Composite Structures

    Cronkhite, James D. | SAE Technical Papers | 1983


    Helicopter Crash Frequency

    M. D. Brandyberry | NTIS | 1990