Development of Composite Constructions with Improved Rain Erosion Resistance
Final summary rept. 1 Dec 1971-31 Dec 1972
HUGHES AIRCRAFT CO CULVER CITY CA AEROSPACE GROUPS
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This report describes the continued investigation of composite constructions with improved rain erosion resistance. The studies included the effect on the rain erosion resistance as determined by whirling arm tests of such variables as matrix, reinforcement, reinforcement configuration, fiber loading, impact angle and fiber angle. Matrices evaluated included rigid epoxies, flexibilized epoxies, polyurethanes, polyphenylene oxide, polybutadiene and polyimide. Reinforcements included ECG GLASS, SCG glass, Nomex and Dacron. Most of the work involved the evaluation of reinforcements in unidirectionally reinforced, end-oriented composites. A LIMITED EFFORT WAS ALSO EXPENDED IN EVALUATING MULTIDIMENSIONAL FABRICS. The test results show that, with respect to rain erosion resistance, polymeric fibers are superior to glass fibers and high fiber loadings are superior to low fiber loadings. One polymeric multidimensional construction was shown to be far superior to several others tested.
- Laminates and Composite Materials