Abstract
This paper aims to accurately predict the stress evolution and stress distribution during shrink fitting process. The hoop stress on rotor-can after shrink fitting process was calculated using Lame’s equation. Then finite element (FE) method was used to calculate the stress evolution on rotor-can during shrink fitting process. The effects of manufacture defects on stress distribution on rotor-can after shrink fitting process was analyzed. Finally, a shrink fitting experiment was carried out, and the residual stress on rotor-can after shrink fitting was measured by hole-drilling strain-gauge method. The results show that during shrink fitting process, thermal stress would occur on rotor-can along axial direction and hoop direction. After shrink fitting process, the fitting stress was along hoop direction. When there were ring-shaped defects on rotor-can, there would be axial stress in the defective area. The theoretical calculation results, simulation results and experimental results are in good agreement with each other.
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