To overcome current limitations of satellite operation timelines, ORS (operationally responsive space) satellites are being developed for rapid configuration and assembly. Time spent on flight qualification tests aimed at assembly verification and launch vehicle integration must be reduced to less than a week. SHM (structural health monitoring) is seen as a possible avenue for real-time assessment of satellite integrity and qualification before launch. Embedded ultrasonics and MMI (magneto-mechanical impedance) were considered as potential candidates for diagnostics of critical system elements. Piezoelectric wafer active sensors in conjunction with an acousto-elastic SHM were used for assessment of aerospace structures with bolted joints. In the presented analysis, the acousto-elastic behavior of the joint was used as an indicator of structural integrity. Experimental results show changes in the nonlinear response of joints as a result of differing bolt torque. Localization potential of the acousto-elastic technique was demonstrated in a complex structure analogous to a typical satellite panel. The MMI method has shown utility in assessing condition of bolted joints in thin plates and a satellite structure. Experimental data reveal changes in magnitude and position of impedance peaks induced by the difference in structural loads applied to the joint. It is suggested that both the acousto-elastic and MMI methods have indicated possibilities for detecting and characterizing damage in satellite bolted joints.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Damage detection in satellite bolted joints


    Additional title:

    Schadensaufdeckung bei Satellitenbolzenverbindungen


    Contributors:


    Publication date :

    2009


    Size :

    10 Seiten, 16 Bilder, 15 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Damage detection in bolted joints by fibre optics distributed sensing

    Güemes, Alfredo / Fernandez-Lopez, Antonio | Tema Archive | 2010



    Bonded-bolted composite joints

    HART-SMITH, L. | AIAA | 1984


    Bolted joints in wood

    Engineering Index Backfile | 1935


    Bolted Joints in Wood

    Emerald Group Publishing | 1935