Investigation of waviness in wind turbine blades: Structural health monitoring | Zendy

Sunil Kishore Chakrapani | Zendy; Vinay Dayal | Zendy; Daniel J. Barnard | Zendy

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Investigation of waviness in wind turbine blades: Structural health monitoring

Author(s) -

Sunil Kishore Chakrapani,

Vinay Dayal,

Daniel J. Barnard

Publication year - 2013

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.4789063

Subject(s) - waviness , turbine blade , structural health monitoring , structural engineering , turbine , materials science , instrumentation (computer programming) , fatigue testing , marine engineering , mechanical engineering , composite material , engineering , computer science , operating system

Waviness in composite wind turbine blades was detected and characterized with the help of air coupled ultrasonics. Based on the aspect ratio, the detected marcels are either accepted or rejected. A passive structural health monitoring approach has been presented here to monitor the accepted marcels above a threshold. The fatigue life of specimen is most affected in the presence of a marcel. Hence this study focused on the damage evaluation after fatigue testing. Wavy laminate was subjected to fatigue load to investigate the fracture mechanisms near the marcel. Different types of defects were identified from this study and were used to develop appropriate instrumentation for health monitoring of a wavy laminate using PVDF patches.

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