The high load intensities and elevated temperature in the wing and fuselage of a supersonic transport aircraft will result in bolted joints stack-up thickness much greater than the current subsonic transport aircraft. Bolt bearing-bypass tests were conducted to develop a database and a bearing-bypass stress interaction for the design community. All test coupons are IM7/PETI-5 quasi-isotropic laminates (64 plies) with a bolt-hole for a 0.95 cm diameter fastener. Static tests were conducted at room temperature as well as at 177 degree C. Thermo-mechanical fatigue tests were conducted using a typical, supersonic transport flight spectrum loading. Short-term creep tests, of 250 h, indicated that IM7/PETI-5 quasi-isotropic (64 plies) laminates has improved properties over IM7/K3B. Long-term creep tests, of 10,000 h, demonstrate that IM7/PETI-5 is highly creep resistant for long periods. Test results also show that these composites experience very little hole elongation before failing in a bearing mode.


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    Title :

    Evaluation of bolt bearing behavior of highly loaded composite joints at elevated temperature


    Contributors:
    Ahmad, H. (author) / Johnson, W.S. (author) / Counts, W.A. (author)

    Published in:

    Publication date :

    2003


    Size :

    13 Seiten, 5 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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