Properties Variation of Carbon Fiber Reinforced Composite for Marine Current Turbine in Seawater
1 Harbin Research Institute of Large Electrical Machinery, Harbin, 150040, China
2 State Key Laboratory of Hydro-power Equipment, Harbin, 150040, China
3 National Engineering Research Center-Hydropower Equipment, Harbin, 150040, China
Turbine blade which are generally made of composite is a core device among components of tidal current power generator that converts the flow of tidal current into a turning force. Recent years, damages of composite turbine blades have been reported due to reasons like seawater degradation, lake of strength, manufacture etc. In this paper, water absorption, tensile, bending, longitudinal transverse shearing properties of carbon fiber reinforced plastic (CRP) composite which would be applied to fabricate the marine current turbine blade has been investigated. Furthermore, the variations of properties with seawater immersion period were studied. The results indicated that the water absorption increased almost linearly at the beginning of immersion and then became stable. Tensile strength of specimen tended to decrease firstly and then recovered slightly. However, the longitudinal transverse shearing strength showed reverse variation trend comparing to tensile strength. And the bending property of specimens was depressed significantly. The properties variations in seawater shall be referenced to design and fabrication of composite marine current turbine blade.
Key words: Carbon fiber reinforced plastic composite / water absorption / tensile property
© The Authors, published by EDP Sciences, 2016
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