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Application of self-healing technique to fibre reinforced polymer wind turbine blade

  • Fifo, Omosola (Department of Civil, Structural & Environmental Engineering, Trinity College Dublin) ;
  • Ryan, Kevin (Department of Civil, Structural & Environmental Engineering, Trinity College Dublin) ;
  • Basu, Biswajit (Department of Civil, Structural & Environmental Engineering, Trinity College Dublin)
  • Received : 2014.08.14
  • Accepted : 2015.01.24
  • Published : 2015.10.25
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Abstract

This paper presents a novel concept of healing some of the damages in wind turbine blades (WTBs) such as cracks and delamination. This is achieved through an inherent functioning autonomous repairing system. Such wind turbine blades have the benefit of reduced maintenance cost and increased operational period. Previous techniques of developing autonomous healing systems uses hollow glass fibres (HGFs) to deliver repairing fluids to damaged sites. HGFs have been reported with some limitations like, failure to fracture, which undermines their further usage. The self-healing technique described in this paper represents an advancement in the engineering of the delivery mechanism of a self-healing system. It is analogous to the HGF system but without the HGFs, which are replaced by multiple hollow channels created within the composite, inherently in the FRP matrix at fabrication. An in-house fabricated NACA 4412 WTB incorporating this array of network hollow channels was damaged in flexure and then autonomously repaired using the vascular channels. The blade was re-tested under flexure to ascertain the efficiency of the recovered mechanical properties.

Keywords

References

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