Mathematical model and algorithm of interface singular stress field of oil-film bearing

To explore the bonding performance of oil-film bearing, the mathematical model and algorithm on interface singular stress field of oil-film bearing bush was established. The oil-film pressure and oil-film temperature were calculated using finite difference method. The interface singular stress fields at the end of bearing under different conditions were calculated and analyzed: Babbitt alloy layer bonding to steel base with and without Tin as interlayer, and Babbitt alloy layer bonding to different steel base materials. The calculation results show that the interface with Tin generated higher stress singularity, which undermines the interface bonding performance. Among normal base materials, 40 steel could reduce the stress singularity effectively, therefore, it is relatively more suitable to be chosen as base material. Moreover, the mechanical model on bonding interface feature of test specimen was built according to GBT 12948-1991 Journal Bearing bi-metallic bonding strength destructive test method; the results validated the influence of temperature on singular stress field on interface end. •Establish the mathematical model and algorithm on interface singular stress field.•Calculate the oil-film pressure and temperature using finite difference method.•Calculate and analyze the interface singular stress fields under two cases.•The interface with Tin as interlayer generates higher stress singularity.•40 steel can reduce the stress singularity at the interface end effectively.