Fractographic examination of failed part of a cluster of body structure of a crashed helicopter

Venkataswamy, MA and Parameswara, MA and Sujata, M and Keshab, Barai and Bhaumik, SK (2003) Fractographic examination of failed part of a cluster of body structure of a crashed helicopter. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

A sample pertaining to the mounting lug of ‘A’ frame at cluster 8D of body structure of accident helicopter was sent to the laboratory for fractographic analysis. It was requested not to carry out any destructive tests on the sample. Fractographic analysis suggests that the lug in question has failed by sudden overload. There were no evidences of delayed failure like stress corrosion cracking or fatigue. The weld quality at the failed lug was found to be poor. Insufficient fusion and lack of weld penetration were observed. However, these imperfections do not appear to have any role to play in the present failure.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Helicopter;body structure;cluster 8D;overload fracture
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: Mrs Manoranjitha M D
Date Deposited: 29 Jul 2011 11:45
Last Modified: 29 Jul 2011 11:45
URI: http://nal-ir.nal.res.in/id/eprint/9729

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