Hashin Failure Theory Based Damage Assessment Methodology of Composite Tidal Turbine Blades and Implications for the Blade Design |
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| Authors: | YU Guo-qing REN Yi-ru ZHANG Tian-tian XIAO Wan-shen JIANG Hong-yong |
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| Affiliation: | State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China,State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China,Strategic Development Department, China Three Gorges Corporations, Beijing 100038, China,State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China and State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | A damage assessment methodology based on the Hashin failure theory for glass fiber reinforced polymer (GFRP) composite blade is proposed. The typical failure mechanisms including the fiber tension/compression and matrix tension/compression are considered to describe the damage behaviors. To give the flapwise and edgewise loading along the blade span, the Blade Element Momentum Theory (BEMT) is adopted. In conjunction with the hydrodynamic analysis, the structural analysis of the composite blade is cooperatively performed with the Hashin damage model. The damage characteristics of the composite blade, under normal and extreme operational conditions, are comparatively analyzed. Numerical results demonstrate that the matrix tension damage is the most significant failure mode which occurs in the mid-span of the blade. The blade internal configurations including the box-beam, I-beam, left-C beam and right-C beam are compared and analyzed. The GFRP and carbon fiber reinforced polymer (CFRP) are considered and combined. Numerical results show that the I-beam is the best structural type. The structural performance of composite tidal turbine blades could be improved by combining the GFRP and CFRP structure considering the damage and cost-effectiveness synthetically. |
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| Keywords: | composites tidal current turbine blade damage assessment tidal energy Hashin failure theory blade design |
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