Failure analysis of LPT rotor blades of an aeroengine

Rangaraju, R and Bhaumik, SK and Bhaskaran, TA and Venkataswamy, MA and Parameswara, MA and Sujata, M (2003) Failure analysis of LPT rotor blades of an aeroengine. Project Report. National Aerospace Laboratories, Bangalore.

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One fractured LPT rotor blade (XRXA 113) along with few cracked blades (XRXA 112, XRXA 139 and XRXA 101) of an aeroengine were forwarded to the laboratory for analysis. Investigation revealed that blade Nos. XRXA 112 and XRXA 113 failed by fatigue. Crack in other two blades were shallow and confined to the coating layer, and the nature of these cracks could not be determined. They appeared to be secondary in nature and subsequent to the primary failure. The fatigue in blade Nos. XRXA 112 and XRXA 113 is of high cycle – low stress type. Vibration appears to be the most probable reason for fatigue crack initiation. There were no defects either in the coating or in the blade material. Also, there was no overheating of the blade.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: Aeroengine;LPTR blade;fatigue
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Mrs Manoranjitha M D
Date Deposited: 14 Jul 2011 11:00
Last Modified: 14 Jul 2011 11:00

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