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1 Applied Mechanics and Engineering

1 1999

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Analysis of a surface crack in rolling bearings

100%

Bassani R. , Ciulli E. , Di Puccio F.

tom Vol. 4, no spec.

305-310

Surface cracks may be detrimental in rolling bearings life. The paper present a linear elastic fracture mechanics approach, based in the weight function method for evaluating the stress intensity factors history during a load cycle. The real contact problem is simplified to a half-plane with an angled crack, and a load travelling over it, due to ehd or hertzian pressure distribution. Moreover the effect of a tractive force is also considered, with a friction coefficient equal to -0.05. The method is rather simple requiring only nominal stresses in the body, easily achievable also in an analytical form, e.g. Applying kolosov-muskhelishvili complex variable approach. Results show that hertzian and ehd pressure distribution causes similar stress intensity factors cycles, even if the first case crack propagation seems to be favoured.