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M. N. A. Amri(암리 무하마드 나빌 아이눌),V. C. Tong(통반칸),S. W. Hong(홍성욱) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
Angular contact ball bearings (ACBB) are widely used in high-speed rotating systems. Geometric errors or defects such as cracks, spalls, surface roughness, and surface waviness may occur in balls or raceways during manufacturing or operating ACBBs. A lot of studies have been devoted to investigating the vibrations or diagnosis of ACBBs subjected to such errors or defects. However, few studies have been reported on the fatigue life change due to those errors or defects. This paper deals with the fatigue life due to the presence of waviness error in inner and outer raceways as a typical geometric error in ACBBs. To this end, this paper presented a computational procedure for the fatigue life of ACBBs subject to waviness errors. The proposed fatigue life formula accounts for the time-varying characteristics of contact forces between the balls and raceways of an ACBB by using the Palmgren-Minor linear cumulative damage theory. Extensive simulations were carried out to analyze the effects of the spatial frequency of waviness, and waviness amplitude on the fatigue life of ACBBs. The results demonstrated that the fatigue life is significantly affected by the waviness error.