지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Blades of horizontal axis are nowadays made of composite materials. Generally, composite materials satisfy design provides lower weight and good stiffness, while laminate composites have often damages as like the delamination and cracks at the interface of laminates. The box spar and tail parts of a blade are composed of the CFRP/GFRP hybrid laminate composites. However, delamination and the interfacial crack often occur in the interface of CFRP/GFRP hybrid laminate composites under the mixed mode fracture condition, especially mode I and mode II. Therefore, there is a need for the evaluation of the mixed mode fracture behavior during the delamination of CFRP/GFRP hybrid laminates. This study shows the experimental results for the delamination fracture toughness in CFRP/GFRP hybrid laminate composites. Fracture toughness experiments and estimation are performed by using DMMB(Dissimilar mixed mode bending) specimen. The materials used in the test are a commercial woven type CFRP(Carbon fiber reinforced plastic) prepreg(CF3327) and UD type GFRP(Glass fiber reinforced plastic) prepreg(HD224A). A CFRP/GFRP hybrid laminate composite is composed by the 10 plies CFRP and GFRP prepreg for DMMB. A thickness of CFRP and GFRP layer is 2.5mm and 3.0mm, respectively. Also the fulcrum location which is a loading parameter is changed from 80 to 100mm on the specimen of length 120mm because it defines the ratio of mode I to mode II. In this study, the effects of the fulcrum location are evaluated in the viewpoint of energy release rate in mode I and mode II contribution. The results show that the delamination crack initiates at higher displacement and lower load according to the increase of the fulcrum location ratio. And the variation of the energy release rate for mode I and II contributions for the mode mixity are shown.
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참고문헌 (14)
참고문헌 신청
D. Craig / 2005 / Wind Farms Information Forum / Wind Turbine Accident Data
L. Banks-Sills / 2000 / Interface Fracture Properties of a Bimaterial Ceramic Composite / Mechanical Materials 32:711~722
A. Kuhl / 2000 / A Technique to Measure Interfacial Toughness Over a Range of Phase Angles / Journal of Electron Package 122:147~151
J. A. Wang / 2006 / A New Approach for Evaluating Thin Film Interface Fracture Toughness / Material Science Engineering A 426:332~345
A. Jyoti / 2005 / Experimental Studies of Mode I Energy Release Rate in Adhesively Bonded Width Tapered Composite DCB Specimens / Composites Science and Technology 65:9~18
L. Banks-Sills / 2000 / Interface Fracture Properties of a Bimaterial Ceramic Composite / Mechanical Materials 32:711~722
A. Kuhl / 2000 / A Technique to Measure Interfacial Toughness Over a Range of Phase Angles / Journal of Electron Package 122:147~151
J. A. Wang / 2006 / A New Approach for Evaluating Thin Film Interface Fracture Toughness / Material Science Engineering A 426:332~345
A. Jyoti / 2005 / Experimental Studies of Mode I Energy Release Rate in Adhesively Bonded Width Tapered Composite DCB Specimens / Composites Science and Technology 65:9~18
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