Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Evaluation of Material Properties about CFRP Composite Adapted for Wind Power Blade by using DIC Method

풍력발전기 블레이드 적용 CFRP 복합재료의 DIC 방법에 의한 재료특성치 평가

  • Received : 2010.05.11
  • Accepted : 2010.08.16
  • Published : 2010.10.31
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Abstract

In recent, the capacity of a commercial wind power has reached the range of 6 MW, with large plants being built world-wide on land and offshore. The rotor blades and the nacelle are exposed to external loads. Wind power system concepts are reviewed, and loadings by wind and gravity as important factors for the mechanical performance of the materials are considered. So, the mechanical properties of fiber composite materials are discussed. Plain woven fabrics Carbon Fiber Reinforced Plastics (CFRP) are advanced materials which combine the characteristics of the light weight, high stiffness, strength and chemical stability. However, Plain woven CFRP composite have a lot of problems, especially delamination, compared with common materials. Therefore, the aim of this work is to estimate the mechanical properties using the tensile specimen and to evaluate strain using the CNF specimen on plain woven CFRP composites. For the strain, we tried to apply to plain woven CFRP using Digital Image Correlation (DIC) method and strain gauge. DIC method can evaluate a strain change so it can predict a location of fracture.

Keywords

References

  1. Dayton A. Griffin, 2001, "WindPACT Turbine Design Scaling Studies Technical Area 1-Composite Blades for 80-to 120-Meter Rotor", NREL/SR-500-29492.
  2. Gunjit S. Bir, P.Migliore, 2004, "Computerized Method for Preliminary Structural design of Composite for Two-and Three-Blade Rotors", NREL/TP-500-31486.
  3. J. Selwin Rajadurai et al., 2008, "Finite element analysiswith an improved failure criterion for composite wind turbine blades", Forsch Ingenieurwes, Vol. 72, pp. 193-207. https://doi.org/10.1007/s10010-008-0078-8
  4. M. Arai et al., 2007, "Mode I and Mode II interlaminar fracture toughness of CFRP laminates toughened by carbon nano fiber", JSME Annual Meeting, pp.667-668.
  5. Standard test method for "Tensile Properties of Polymer Matrix Composite Materials.", ASTM D 3039, 2000.
  6. D. Lecompte, A. Smits and S. Bossuyt, 2006, "Quilty assessment of speckle patterns for digital image correlation", Optics and lasers engineering, Vol. 44, pp. 1132-1145. https://doi.org/10.1016/j.optlaseng.2005.10.004
  7. S.R.Mcneil, W. Peters and M. A. Sutton, 1987, "Estimation of stress intensity factor by digital image correlation", Engineering fracture mechanics, Vol. 28, pp. 101-112. https://doi.org/10.1016/0013-7944(87)90124-X
  8. G.Quinn, 1990, "Flexure strength of advanced structural ceramics", Journal of American Ceramic Society, Vol. 74, pp. 2037-2066.
  9. H. Maikuma, J. W. Gillespie and J. M. Whitney, 1989, "Analysis and experimental characterization of the center notch flexural test specimen for mode II interlaminar fracture", Journal of composite materials, Vol. 23, pp. 756-786. https://doi.org/10.1177/002199838902300801
  10. Yu-Sung Yun and Oh-Heon Kwon, 2006, "The evaluation of interlaminar fracture toughness and AE characteristics in plain woven CFRP composite with ENF specimen", Journal of the Korea Society for Power System Engineering, Vol. 10, No. 2, pp. 117-123.