The Mechanism of Bearing Surface Fatigue–-Experiments and Theories
作者:
Y.P. Chiu,
期刊:
Tribology Transactions
(Taylor Available online 1997)
卷期:
Volume 40,
issue 4
页码: 658-666
ISSN:1040-2004
年代: 1997
DOI:10.1080/10402009708983706
出版商: Taylor & Francis Group
关键词: Rolling-Element Bearings;Rolling-Contact Fatigue;Stress Analysis
数据来源: Taylor
摘要:
This paper begins, with a discussion on the limitations of the bearing lubrication parameter, i.e., the Lambda ratio, as well as the variables which influence surface fatigue of rolling bearings, based on close examination of results of bearing tests and peeling tests. Since most rolling bearings in service operate in the “low Lambda” regime, the maximum stress in the microcontact of asperities can be much higher than that in the macrocontacts of rolling members. A localized residual stress field is generated as a result of plastic deformation in microcontact. This residual stress contains a tensile component, which is believed to be more detrimental than compressive stress. A new unified bearing surface (micropitting) failure theory is proposed based on the tensile (residual and applied) stress in the material. This theory can be used to quantify the effect of asperity contact maximum pressure, residual compressive stress, tensile hoop stress and hardness on pitting fatigue life.Presented at the 52nd Annual Meeting in Kansas City, Missouri May 18–22, 1997
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