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风机叶片断裂原因分析
韩露, 于翔天, 王影, 谢国君, 逄锦程
航天材料及工艺研究所, 北京 100076
摘要:
叶片在安装试运行过程中发生断裂,断裂位置位于叶根附近,通过对故障件的观察、测试与分析,确定了叶片发生低周疲劳断裂的原因是由于生产过程中工艺控制不良,叶片根部局部区域树脂固化不完全,导致该区域的强度、刚度极低,当受到疲劳载荷作用时在结构应力集中区域首先发生分层开裂、扩展直至最终失稳断裂。同时指出固化不完全的原因。
关键词:  叶片  疲劳断裂  树脂  纤维  固化
DOI:10.12044/j.issn.1007-2330.2017.01.014
分类号:TG178
基金项目:
Fracture Reason Analysis of Wind Turbine Blade
HAN Lu, YU Xiangtian, WANG Ying, XIE Guojun, PANG Jincheng
Aerospace Research Institute of Materials & Processing Technonlogy, Beijing 100076
Abstract:
The blade in the installation of test failed in the operating process,fault location is located in the root of blade.Through observation,testing and analysis of fault component,the reason blade produced by low cycle fatigue fracture is identified due to improper control of production process.The blade root curing is incomplete in local area,which causes the strength and stiffness of very low. Fiber beam between curing not completely of resin cannot will load effective of passed to near of fiber beam, so dang by fatigue load role in structure stress concentrated regional first occurred layered cracking, and extended until eventually lost stability fracture.The direction for improvement is pointed out.
Key words:  Blade  Fatigue fracture  Resin  Fiber  Curing