Failure of Dowel Bolts of MIG-21 Aircraft

Raghuram, AC and Radhakrishnan, S and Krishnan, RV and Ramachandran, V (1988) Failure of Dowel Bolts of MIG-21 Aircraft. Project Report. National Aerospace Laboratories, Bangalore.

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The spur and bevel gears of R-11 engine fitted on MIG-21 aircraft are fastened together by a set of six dowel bolts . A series of accidents caused by the failure of the dowel bolts had been reported . Bolts from five engines were examined in detail . The tell-tale marks on the gear assembly and on the fracture surface clearly indicate that there existed a gap between the gears leading to relative motion between the bolts and the bevel gear, resulting in fatigue failure.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: R-11 engine, spur gear, bevel gear, dowel bolts, interference fit, fretting fatigue .
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Ms Indrani V
Date Deposited: 10 Aug 2012 04:37
Last Modified: 10 Aug 2012 04:37

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