In this paper, data on time dependent behavior of bolted joints made from 64 ply IM7 carbon fiber/K3B thermoplastic polyimide quasi-isotropic lay-up tested in pure bolt bearing and in bearing bypass is presented. Composite panels were aged attemperatures of 177°C(350°F) and 204°C(400°F) for 5000 and 10,000 hours to simulate cumulative effects of supersonic flight conditions on a bolted composite joint. Change in joint bearing capacity and determination of time dependent behavior have beencovered in this study. For testing, coupons sized and drilled to correspond to the ratios found in actual joints were loaded to a wide range of loads both with and without clamp-up forces. Testing was done at a temperature of 177°C(350°F), to simulatesupersonic cruise temperature. Bearing creep testing revealed time dependent behavior only in a very narrow loading region, above which bearing failure occurred almost instantaneously, and below which no damage occurred. Testing of aged material has shown degradation in material aged at 177 °C(350°F) for 5000 hours, however, material aged at 177°C (350°F) for 10,000 hours demonstrated a recovery in bearing capacity while comparison with material aged at 204°C (400°F) for 5000 and 10000 hours showedneither equivalent nor increased performance degradation.
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