A fracture mechanical life prediction method for rolling contact fatigue based on the asperity point load mechanism
2012 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 83, 62-74 p.Article in journal (Refereed) Published
The purpose was to develop a fracture mechanics based method for determining the life of surface initiated rolling contact fatigue or spalling. The life simulations were based on the asperity point load mechanism, a mode I crack growth assumption and LEFM. The life prediction was verified against the spalling life in some gear teeth, which had been measured for the simulation data. The computational tool required an equivalent mixed-mode life parameter. Such are suggested in the literature and some of these were evaluated. Also, the work required material properties for crack growth at stress cycles with highly compressive minimum loads. An experimental series was performed for crack growth at R < 0. Negative crack closure limits K-I,K-cl were suggested by the compliance but not the crack growth rate. Simulations with small negative closure limits (K-I,K-cl = -0.1 MPa root m) predicted the spalling life in the gears. It was however noted that the life predictions depended more on K-I,K-cl than the equivalent mixed-mode life parameter.
Place, publisher, year, edition, pages
2012. Vol. 83, 62-74 p.
Rolling contact fatigue, Spalling, Asperity, Crack closure, Fatigue life, Plane mixed-mode
IdentifiersURN: urn:nbn:se:kth:diva-95123DOI: 10.1016/j.engfracmech.2011.12.012ISI: 000302515000006ScopusID: 2-s2.0-84857916030OAI: oai:DiVA.org:kth-95123DiVA: diva2:526782
FunderSwedish Research Council
QC 201205152012-05-152012-05-142014-02-10Bibliographically approved