UNIAXIAL AND BIAXIAL TEST AND FULL-FIELD 3D DEFORMATION ANALYSIS FOR A WIND TURBINE BLADE

Abstract

Abstract: A wind turbine blade was tested for the full-field 3D deformations under uniaxial and biaxial static loads by making use of digital image correlation technique. The results showed that the 3D displacements of the wind turbine blade are well distributed while the strains are not. Among the three displacements, the out-of-plane displacement is much larger than the in-plane displacement. The 3D displacements of the wind turbine blade induced by the biaxial loads differ significantly from their counterparts induced by uniaxial loads, and the differences increase as the load increases. In the full field of the wind turbine blade, the flapwise displacements under biaxial loading are greater than that under uniaxial loading of the same level. From the root up to 74% of the blade length (100cm), the edgewise displacements under dual-axis loading are larger than those under single-axis loading, while it is contrary in the rest part of the blade. The spanwise displacements generated by uniaxial and biaxial loading are almost 0 in the region of 0~41% of the blade length. In the rest region of the blade, the spanwise displacements under biaxial loading are greater than that under uniaxial loading of the same level.

Key words: wind turbine blade, digital image correlation, static load, full-field, 3D deformation

CLC Number:

TB332
TK83

HU Xue-bing, ZHOU Hua-fei, WANG Xiao-ping, QIN Liang-zhong. UNIAXIAL AND BIAXIAL TEST AND FULL-FIELD 3D DEFORMATION ANALYSIS FOR A WIND TURBINE BLADE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(9): 39-46.

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