Investigation of structural failure of an aircraft

Venkataswamy, MA and Parameswara, MA and Sujata, M and Bhaumik, SK (2004) Investigation of structural failure of an aircraft. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

Fracture surface analysis revealed that the structural failure of an aircraft had taken place by sudden overload and there were no evidences of progressive failure like fatigue. Detachment of the dome from the booster appears to be the first in the chain of events. There were no noticeable deformation and/or shearing of threads either in the cylinder or in the dome of the booster and hence generation of excess overall pressure leading to the detachment of dome appears to be unlikely. Since no remnant of the O-ring was found on the booster and also, the O-ring could not be traced at the incident site, O-ring not being present in the assembly is a possibility. In the event of O-ring not being present, whether or not the threaded region of the cylinder can expand leading to detachment of the dome needs to be established either through stress analysis or simulated experiment. A detailed analysis of the failure is presented in this report.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Pilot less target aircraft;booster failure;launch 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: Mrs Manoranjitha M D
Date Deposited: 27 Jul 2011 11:35
Last Modified: 27 Jul 2011 11:35
URI: http://nal-ir.nal.res.in/id/eprint/9623

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