Application of a New Physically Based Model to Determine the Influence of Inclusion Population and Loading Conditions on the Distribution of Bearing Lives

摘要: The principal cause of failure in bearings under E.H.D. conditions is deep spalling initiated beneath the surface. corresponding damage mechanisms have been clearly identified (fatigue “butterflies”, crack nucleation and propagation to surface). In this context, a statistical model, based on mixed approach combining micromechanics physical metallurgy, has developed for predicting distribution bearing lives from inclusion population steel. model validated by comparing its predictions with experimental probability curves determined flat washer fatigue tests performed steel whose had accurately established. existence non zero survival rates very long indicates that Weibull [1] not suitable represent complete life modern bearings. predictive capabilities used study influence parameters, such as applied load, specimen size, etc.