N.R. Lee, S.Y. Hwang, N. Kim
Sogang University, Korea
pp. 21 - 24
Keywords: bearing life, run-out, wear depth, spalling, archard wear model, Cockroft-Latham damage model, accelerated life test
Wear is one of the most important factors affecting roller bearing performance and in determining bearing life-time. Bearing life has traditionally been defined by the onset of spalling (ISO 281), but this definition does not always reflect operational conditions as bearing wear can also represent a failure criterion such as run-out. Therefore, bearing life is predicted according to the bearing run-out amount. Bearing wear was modeled based on Archard wear model and Cockroft-Latham damage model which were incorporated as part of an FE wear and run-out simulation. The wear models were modified in order to increased reliability of the bearing life prediction. Also, accelerated life testing was used for testing in a short time, and the amount of bearing run-out was measured in the testing. Experimental testing was also performed to confirm the integrity of the methodology and validate the simulation results and showed good correlation with the simulation results. The simulation model was also used to predict the bearing life under spalling and was compared to test data obtained using ISO 281 and was also found to provide good agreement.