Fatigue Properties of Graphite/Glass/Epoxy Composites.
Final rept. 9 Feb 72-9 Feb 73,
IIT RESEARCH INST CHICAGO ILL
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Two ternary composite material systems, PR 286Modmor IIGraphiteS-Glass and PR 286 HMS GraphiteS-Glass, involving two types of lamination fabrications, namely uniformly distributed interply hybrids and core-shell hybrids, were investigated. The test program included static tests, tensile fatigue tests, shear fatigue tests, modulus degradation studies and microscopic examination. The study shows that hybrid composites perform generally satisfactorily in fatigue and will survive rigorous stress cycling. Distributed interply hybrids show a better mechanical performance than core- shell hybrids. The mechanical behavior of hybrid composites generally follows the rule of mixtures and the rule of mixtures can be used to predict elastic moduli of hybrids. The performance as a percentage of the fatigue strength at any given life of 11 graphiteglassepoxy relative to pure HMS GRAPHITE IS BETTER THAN THAT OF 11 HTS Graphiteglassepoxy relative to pure HTS GRAPHITEEPOXY. Author, modified-PL
- Laminates and Composite Materials