Fatigue Behavior of Graphite Composites
Final rept. 9 Feb 1971-8 Feb 1972
IIT RESEARCH INST CHICAGO IL
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The objective of this report is to improve the material performance of a graphiteepoxy prepreg composite with particular relevence to its fatigue performance. Fatigue strength and resistance to fatigue damage of Modmor II Narmco 5206 composite were improved by interleaving the composite prepreg laminate with glass scrim cloth. Cantilever beam specimens of two fiber orientations were tested under uniform stress fatigue and sequential block loading. Flexural strength studies and the effects of ambient aging of composites on their elevated temperature properties are reported. Besides ambient aging the investigation also included accelerated aging tests on laminates of two different fiber orientations with and without interleaving of scrim cloth. Improvement in the mechanical behavior of graphiteepoxy prepreg composite was obtained with the addition of glass scrim cloth.
- Laminates and Composite Materials