Failure Analysis on Tail Rotor Teeter Pivot Bolt on a Helicopter

2017 2nd International Conference on Mechatronics and Electrical Systems

机械制造;无线电电子学

Qiang, Wang^1 ; Zi-Long, Dong^1

Civil Aviation Flight University of China, Xinjin Branch, Qiaojin Up-street No.320, Xinjin County, China^1

关键词: Band characteristics;    Chemical component;    Fatigue fracture;    Fracture face;    Fracture mode;    Fracture surfaces;    Metallurgical structures;    Tail rotors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/339/1/012033/pdf
DOI  :  10.1088/1757-899X/339/1/012033

来源: IOP

【 摘 要 】

Tail rotor teeter pivot bolt of a helicopter fractured when in one flight. Failure analysis on the bolt was finished in laboratory. Macroscopic observation of the tailor rotor teeter pivot bolt, macro and microscopic inspection on the fracture surface of the bolt was carried out. Chemical components and metallurgical structure was also carried out. Experiment results showed that fracture mode of the tail rotor teeter pivot bolt is fatigue fracture. Fatigue area is over 80% of the total fracture surface, obvious fatigue band characteristics can be found at the fracture face. According to the results were analyzed from the macroscopic and microcosmic aspects, fracture reasons of the tail rotor teeter pivot bolt were analyzed in detail.