METHOD FOR DIAGNOSING SERVICE LIFE OF BEARING COMPONENT, DEVICE FOR DIAGNOSING SERVICE LIFE OF BEARING COMPONENT, AND PROGRAM FOR DIAGNOSING SERVICE LIFE OF BEARING COMPONENT

摘要

For each of a plurality of test bearing components, a combined-stress calculation unit (34) finds a combined stress of the test bearing components, which is the sum of a micro-stress and a residual stress of the test bearing components at the time that failure breakage occurs when a rolling fatigue test is performed a plurality of times until failure breakage, and finds the combined stress of a diagnostic bearing component, which is the sum of the micro-stress and the residual stress of the diagnostic bearing component. An S-N curve calculation unit (35) finds an S-N curve for the plurality of test bearing components on the basis of a relationship between the total number of loadings in the plurality of rolling fatigue tests and the combined stress of the test bearing components. A diagnostic unit (37) finds the service life of the diagnostic bearing component on the basis of the S-N curve and the combined stress of the diagnostic bearing component.