Failure analysis of Plunger

Madan, M and Venkataswamy, MA and Sujata, M and Bhaumik, SK (2007) Failure analysis of Plunger. Project Report. National Aerospace Laboratories, Bangalore, India.

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Abstract

A fractured plunger of brake parachute release mechanism of an aircraft was analyzed. Fractographic study suggests that the failure had taken place by bending overload. There were no evidences of progressive failure such as fatigue. The material of the plunger was found to conform to the specification. Analysis shows that bending load on the free end of the plunger is probably unavoidable in the assembly. It is suggested that this be taken into account and the wall thickness be increased accordingly to avoid recurrence of similar failure. Alternatively, the free end may be made solid, if weight penalty is permissible.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aircraft;Plunger of brake parachute release mechanism; 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
Depositing User: Ms. Alphones Mary
Date Deposited: 25 Jul 2011 10:42
Last Modified: 25 Jul 2011 10:42
URI: http://nal-ir.nal.res.in/id/eprint/9552

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