The airframe of a large helicopter generally requires additional stiffening for dynamic tuning to prevent resonance with the rotor vibratory forces. Investigations showed that aluminum stringers reinforced with boron/epoxy offered substantial weight saving for the CH54B Skycrane helicopter to achieve the required airframe stiffness. As a result, a program has been conducted under a NASA contract to design, test, and evaluate the static and fatigue strength characteristics of the composite reinforcement. The results of this phase of the effort will be reported in this paper.


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    Title :

    Design, analysis, and test of a boron/epoxy reinforced airframe.


    Contributors:
    Rich, M. J. (author) / Welge, R. T. (author)

    Conference:

    Structures, Structural Dynamics, and Materials Conference ; 1972 ; San Antonio, TX


    Publication date :

    1972-04-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :



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