Analysis of fractured eyering shaft of ramp side attachment fitting of cargo door assembly belonging to an aircraft

Madan, M and Bhuvana, R and Sujata, M and Venkataswamy, MA and Bhaumik, SK (2009) Analysis of fractured eyering shaft of ramp side attachment fitting of cargo door assembly belonging to an aircraft. Project Report. National Aerospace Laboratories, Bangalore, India.

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Abstract

A fractured eyering shaft (port) of the cargo door assembly of an aircraft was sent to the laboratory for analysis. Examination revealed that the shaft had fractured at the locking position resulting in dislodgement of the roller sub-assembly meant for moving the ramp on the track. The fracture surface was found to be extensively damaged and as a result, fractographic features on majority of the fracture surface were obliterated. However, in isolated places, the fracture surface was relatively preserved and examination of these regions showed presence of ductile dimple rupture, typical of overload failure. Because of post fracture damage, fractographic study alone was not adequate for establishing the failure mode. However, the fractographic study along with evidences available on the side track (port) suggests that the fracturing of the eyering shaft occurred most probably due to excessive load. A detailed analysis of the failure is presented in this report.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aircraft;Eyering shaft;Overload failure
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: 18 Jul 2011 11:04
Last Modified: 18 Jul 2011 11:04
URI: http://nal-ir.nal.res.in/id/eprint/9409

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