Analysis of failed retainer ring of wheel hub of an aircraft

Venkataswamy, MA and Sujata, M and Madan, M and Suresh Kumar, M and Bhaumik, SK (2006) Analysis of failed retainer ring of wheel hub of an aircraft. Project Report. National Aerospace Laboratories, Bangalore, India.

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Abstract

A fractured retainer ring of wheel hub of an aircraft was analyzed. Analysis showed that there was multiple fatigue crack initiation all along the circumference of the ring at the fillet of change in the cross section. The cracks propagated to about 30 % of the cross section before culminating in final overload failure by shear. There were no metallurgical abnormalities associated with fatigue crack initiation and fatigue appears to be stress related. Due to post fracture damage in the crack initiation regions, the reason for fatigue crack initiation could not be determined unambiguously. However, analysis suggests that the most probable reason for fatigue crack initiation could be heavy landing (s) of the aircraft sometime in the past.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aircraft;Retainer ring;Wheel hub;Low cycle – high stress fatigue;Heavy landing
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
Depositing User: Ms. Alphones Mary
Date Deposited: 29 Jul 2011 11:03
Last Modified: 29 Jul 2011 11:03
URI: http://nal-ir.nal.res.in/id/eprint/9714

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