Failure analysis of MGB housing of a helicopter

Suresh Kumar, M and Madan, M and Venkataswamy, MA and Parameswara, MA and Sujata, M and Bhaumik, SK (2005) Failure analysis of MGB housing of a helicopter. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

The mounting lug of the MGB housing of a helicopter has failed by fatigue. With the available evidences, it was not possible to establish the exact cause of the failure. Analysis shows that the fatigue crack initiation was due to one or more of the following reasons: (a) ovality in the lug bore and/or bush, (b) excessive rotational torque on the MGB housing, and (c) improper fitment. No metallurgical abnormalities were responsible for the failure. The microstructure and chemical composition of the housing material were found to conform to RZ-5 specification.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Helicopter;MGB housing;fatigue
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: 23 Aug 2011 10:40
Last Modified: 23 Aug 2011 10:40
URI: http://nal-ir.nal.res.in/id/eprint/9912

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