The new Swedish fighter JAS39 Gripen has a large number of primary structures made of composites. On those structures a large number of bolted joints are used which during the aircraft's service life will be subjected to spectrum fatigue loading. Consequently it is important to study the spectrum fatigue life of bolted joints. Specimens with a double-lap configuration and six bolts have been fatigue loaded at the load ratios R=-0.2 and R=-5. Specimens were also fatigue loaded with a vertical fin spectrum which had different amounts of elimination of load cycles. A linear damage rule, Miner's rule, was used to predict the spectrum fatigue life. The experimental results show that the shortest fatigue life occurs for specimens loaded at R=-1 followed by specimens loaded at R=-0.2. The longest fatigue life occurred for specimens loaded at R=-5. It was found that 50% elimination of load cycles in the spectrum can be used without affecting the fatigue life. The Miner's rule predictions appeared to overestimate the spectrum fatigue life. From bolt failure it was found that the first bolt row transfers the largest amount of load in the specimens.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Spectrum fatigue of composite bolted joints


    Contributors:
    Schon, J. (author) / Nyman, T. (author)

    Published in:

    Publication date :

    2002


    Size :

    7 Seiten, 18 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Bonded-bolted composite joints

    HART-SMITH, L. | AIAA | 1984


    Bonded-bolted composite joints

    HART-SMITH, L. J. | AIAA | 1985


    STRUCTURAL JOINTS AND REPAIRS: BEARING FATIGUE RESPONSE IN BOLTED HYBRID COMPOSITE JOINTS

    Brewer, John S. / Palazotto, Anthony N. / Holycross, Casey et al. | TIBKAT | 2021


    Structural Joints and Repairs: Bearing Fatigue Response in Bolted Hybrid Composite Joints

    Brewer, John S. / Palazotto, Anthony N. / Holycross, Casey et al. | AIAA | 2021


    Composite bolted joints analysis program

    SNYDER, B. / BURNS, J. / VENKAYYA, V. | AIAA | 1988