Low cycle fatigue prediction of the aluminium alloy compresor wheel

This paper is devoted to give a brief review of the mechanism proceeding cracks initiation in the fatigue process in the compressor wheel. Finite element analysis has been used to calculate triaxial stresses. Alternating and mean stresses of each sub cycle where calculated in each direction and Sines’ methodology was used to convert triaxial stress to an equivalent uniaxial stress. Damage caused by each sub cycle found using test bar S-N curve. Total life was found using Miner’s rule.