Failure analysis of Main wheel hub of a crashed aircraft

Venkataswamy, MA and Sujata, M and Parameswara, MA and Madan, M and Suresh Kumar, M and Bhaumik, SK (2005) Failure analysis of Main wheel hub of a crashed aircraft. Project Report. National Aerospace Laboratories, Bangalore.

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The wheel hub in question has failed by fatigue. Three fatigue cracks were identified and all of them were found to have initiated at the fillet of the outer rim region close to the boltholes. After initiation, the cracks have propagated to a depth of about 15 mm. The crack lengths were measured to be in the range 45 to 60 mm. The microstructure of the wheel hub material was found satisfactory and there were no metallurgical abnormalities at the fatigue crack origins. The fatigue is stress related. From the pattern of failure, assembly stresses appear to be the most probable reason for fatigue crack initiation. However, the information provided is not adequate enough to ascertain this unambiguously.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: Aircraft, wheel hub, fatigue
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Mrs Manoranjitha M D
Date Deposited: 21 Jul 2011 05:28
Last Modified: 21 Jul 2011 05:28

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