Analysis of failed booster of an aircraft

Bhaumik, SK (2003) Analysis of failed booster of an aircraft. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

A failed booster of an aircraft along with a recovered booster and an unused booster were sent to the laboratory to analyse the cause of failure. Examination revealed that the booster has failed at the knuckle region. The failure took place away from the weld in the parent material. Extensive deformation of the sheet metal was observed at the failed region, which resulted in necking leading to fracture. Microstructural study indicated higher temperature in the failed booster than those in the recovered booster. From the analysis, it appears most probable that the failed booster has experienced pressure and/or temperature beyond the limit. The reasons for the rise in pressure and/or temperature could be the variations in the propellant combustion rate or variations in the profile and dimension of the convergent-divergent graphite nozzle or both. These aspects need to be examined to arrive at the exact cause of the booster failure. There were no abnormalities in the material of construction and it was found to conform to 15CDV6 steel specifications.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aircraft;booster;overload failure at high temperatures
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 07 Jul 2011 14:54
Last Modified: 07 Jul 2011 14:54
URI: http://nal-ir.nal.res.in/id/eprint/9289

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