Impellers and blades are the key components of turbomachines, and fatigue is the main failure
mode of impellers and blades. The status and progress of fatigue research on impellers and
blades were systematically introduced through reviewing fatigue failures, numerical simulations
of fatigue, and fatigue tests of impellers and blades in several typical turbomachines.
High cycle fatigue caused by vibration was the main failure mechanism, and fatigue cracks
usually initiated from the location of stress concentration. The resonance caused by the aerodynamic
load was the main cause of fatigue failure of impellers and blades in a steady operating
condition. The coupling of the meshless method and the finite element method and the combined
fatigue test of actual impellers and blades are the developmental direction and research
focus of the future.