Abstract
In rent years, the development of wind turbine is rapid in Taiwan. The design of blade directly impact power effectiveness. In this study, the effect of manufacturing parameters and environmental factors on mechanical properties of carbon fiber/epoxy composites was discussed. The different manufacturing parameters in manufacturing process affect the mechanical properties. Carbon composites made by different layer number and Placement angle do mechanical properties test, and the effect of the manufacturing parameters was understood by the variation of mechanical strength. Carbon composites placed in high humidity environment do mechanical properties test, and the effect of the high humidity was understood by the reduction of mechanical strength. In different placement angle test, 90° is better than 0° in mechanical properties, so carbon fiber woven still has difference in 0° and 90°. In different layer number test, different layer number makes Permeability changes. layer number less than 5 layers makes bad impregnation and thin monolayer thickness. Composites made by 10 layers carbon fiber woven have better maximum stress, Young’s modulus. In high humidity test, the composite absorbs a little moisture and the mechanical strength slightly rises. The reason of increased mechanical strength is that epoxy expands and voids and defects are filled. When composite absorbs more moisture, the mechanical strength significantly decrease. The possible reason is that the epoxy plasticize and binding force between layers decreases. Maximum stress decreased by about 27%