Failure analysis of rod end top of the tracking link assembly of a helicopter

Venkataswamy, MA and Parameswara, MA and Sujata, M and Madan, M and Suresh Kumar, M and Bhaumik, SK (2005) Failure analysis of rod end top of the tracking link assembly of a helicopter. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

Evidences suggest that the mechanical damage that got created on the bore inner surface during fatigue test due to preferential metal-to-metal contact at the bearing interface was responsible for the early fatigue crack initiation and premature failure of the rod end tops. The most probable reason for non-uniform contact at the bearing interface appears to be due to improper staking of the bearing into the rod end top bore. It is recommended that the alignment and pressure calibration of the press, and geometry and dimensions of the staking tools be checked and corrective measures incorporated to avoid improper assembly. The material of construction and the microstructure conform to specification and hence not responsible for the premature failure.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Helicopter;rod end top;fatigue;improper assembly
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 05 Dec 2011 16:50
Last Modified: 05 Dec 2011 16:50
URI: http://nal-ir.nal.res.in/id/eprint/10116

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