Rolling contact fatigue crack path prediction by the asperity point load mechanism
2011 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 78, no 17, 2848-2869 p.Article in journal (Refereed) Published
The crack path of surface initiated rolling contact fatigue was investigated numerically based on the asperity point load mechanism. Data for the simulation was captured from a gear contact with surface initiated rolling contact fatigue. The evolvement of contact parameters was derived from an FE contact model where the gear contact had been transferred to an equivalent contact of a cylinder against a plane with an asperity. Five crack propagation criteria were evaluated with practically identical crack path predictions. It was noted that the trajectory of largest principal stress in the uncracked material could be used for the path prediction. Different load types were investigated. The simplified versions added some understanding but the full description with cylinder and asperity pressures was required for accurate results. The mode I fracture mechanism was applicable to the investigated rolling contact fatigue cracks. The simulated path agreed with the spall profile both in the entry details as in the overall shape, which suggested that the point load mechanism was valid not only for initiation but also for rolling contact fatigue crack growth.
Place, publisher, year, edition, pages
2011. Vol. 78, no 17, 2848-2869 p.
Rolling contact fatigue, Spalling, Asperity, Fatigue crack path, Mode I, Plane mixed-mode
IdentifiersURN: urn:nbn:se:kth:diva-47655DOI: 10.1016/j.engfracmech.2011.07.012ISI: 000301734000002ScopusID: 2-s2.0-80054855001OAI: oai:DiVA.org:kth-47655DiVA: diva2:455909
FunderSwedish Research Council
QC 201111142011-11-112011-11-112014-02-10Bibliographically approved