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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Considering the wind power system and the rotor blades which are composed of much technology, the wind power blade would be the most dangerous part because it revolves at high speed and weighs about dozens of tons, if the accident happens. Therefore, the light weight composite materials have been replacing as substitutional materials. The object of this study is to examine the delamination and damage for CFRP/GFRP hybrid composite that is used for strength improvement of a wind power blade. The influence of the initial crack length and fiber orientation for the interlaminar delamination was exposed for the blade safety. Plain woven CFRP instead of GFRP was inserted into the layer of the box spar for improving the strength and blade life. DCB(Double Cantilever Beam) specimen was used for evaluating fracture toughness and damage evaluation of interlaminar delamination. The material used in the experiment is a commercial material known as CF 3327 EPC in plain woven carbon prepreg(Hankuk Carbon Co.) and UD glass fiber prepreg(Hyundai Fiber Co.). From the results, crack growth rate is not so different according to the variation of the initial crack length. Mode I interlamainar fracture toughness of fiber direction $0^{\circ}$ is higher than that of $45^{\circ}$. Interlaminar fracture has an effect on fiber direction and K decreased with lower value according to increasing initial crack length. Also energy release rate fracture toughness was evaluated because CFRP/GFRP hybrid composite with a different thickness is under the mixed mode loading condition. The interlaminar fracture was almost governed by mode I fracture even though the mixed mode.
목차
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참고문헌 (11)
참고문헌 신청
David Craig / 2005 / Caithness Wind Farms Information Forum / Wind Turbine Accident Data
Gunjit S. Bir / 2004 / Computerized Method for Preliminary Structural Design of Composite for Two-and Three-Blade Rotors
윤유성 / 2005 / DCB 시험편의 평직 CFRP 복합재 층간파괴인성 및 AE 특성 평가 / 한국안전학회지 20(1):49~54
F. Ozdil / 1999 / Beam Analysis of Angle-ply La minate DCB Specimen / Composites Science and Technology 59(2):305~315
S. Bennati / 2009 / An Enhanced Beam Theory Model of the Asymmetric Double Cantilever Beam Test for Composite Laminates / Composite Science and Technology 69:1735~1745
Gunjit S. Bir / 2004 / Computerized Method for Preliminary Structural Design of Composite for Two-and Three-Blade Rotors
윤유성 / 2005 / DCB 시험편의 평직 CFRP 복합재 층간파괴인성 및 AE 특성 평가 / 한국안전학회지 20(1):49~54
F. Ozdil / 1999 / Beam Analysis of Angle-ply La minate DCB Specimen / Composites Science and Technology 59(2):305~315
S. Bennati / 2009 / An Enhanced Beam Theory Model of the Asymmetric Double Cantilever Beam Test for Composite Laminates / Composite Science and Technology 69:1735~1745
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