Vibration Fatigue Life Analysis of Compressor Blade under Corrosion Conditions

In order to study the vibration fatigue failure mechanism of a compressor blade under corrosion conditions, the effects of the pre-corrosion on the vibration fatigue behavior of a compressor blade was studied based on the characteristics of the working conditions. In this study, an expression (C-T curve) describing the vibration fatigue life was build based on the corrosion influence coefficient curve. The results show that the C-T curves have good suitability and accuracy for describing the variations of the vibration fatigue life after the pre-corrosion. The computation results of the C-T curve using the power function have relatively higher precision, which predicted that the vibration fatigue life of compressor blade would decrease by 28% after 15 calendar years.