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적층 방법에 따른 복합재의 저온 영역 하에서 정적 강도 변화
엄수현(S.H. Eum),P.K. Dutta,권순철(S.C. Kwon),김국진(K.J. Kim),김윤해(Y.H. Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
When the wind turbine is used in cold regions, the mechanical properties and dimension stability of<br/> the blade will be changed. The proposal of this paper is to test the durability of the blade for wind<br/> turbine. It is necessary to select the most comfortable materials and fabrication processes for more<br/> stable wind turbine blade in cold regions. To select the most comfortable materials and processes, the<br/> static strength has to know through the tensile static tests at the severe condition as cold regions. First,<br/> the tensile static specimens made by RIM (Resin injection molding) process & vacuum bagging process<br/> with reinforcement materials and resin. Tensile static tests were carried out on three laminate lay-ups<br/> (carbon prepreg, carbon fiber dry fabric and glass fiber dry fabric) at different test temperature(24 ,<br/> -30 ), determining properties such as the mechanical strength, stiffness and strain to failure. At<br/> different test temperature, in order to test the tensile strengths of these specimens used the low<br/> temperature chamber. Next, the results of this test were compared with each other. Finally, the most<br/> comfortable materials and fabrication processes can select based on these results. The results show the<br/> changes in the static behavior of three laminate lay-ups at different test temperatures. At low<br/> temperatures, the static strengths are higher than the ones at room temperature.