Analysis of failed bolt of horizontal stabilizer support (RH) of a helicopter

Sujata, M and Madan, M and Bhaumik, SK (2008) Analysis of failed bolt of horizontal stabilizer support (RH) of a helicopter. Project Report. National Aerospace Laboratories, Bangalore, India.

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Abstract

A failed bolt of horizontal stabilizer support (RH) of a helicopter was analyzed. Analysis showed that the bolt has failed by fatigue; crack being initiated at the thread root. Evidences suggest that the premature fatigue crack initiation was promoted due to (a) excessive clearance between the bolt and the assembly, and (b) excessive tightening of the bolt. The material of construction and the strength parameter were found to conform to the specifications. No metallurgical abnormalities were responsible for the fatigue crack initiation.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Helicopter;Attachment bolt;Fretting;Fatigue
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Ms. Alphones Mary
Date Deposited: 25 Jul 2011 10:16
Last Modified: 25 Jul 2011 10:16
URI: http://nal-ir.nal.res.in/id/eprint/9521

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