Journal ArticleDOI
Fatigue Life Reduction in Mixed Lubricated Elliptical Contacts
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TLDR
In this paper, the effects of mixed lubrication and surface roughness on machine components performance were investigated and the stress-based Ioannides and Harris model incorporating the fatigue limit was used to evaluate the fatigue life variation.Abstract:
Highly loaded ball and rolling element bearings are often required to operate in the mixed elastohydrodynamic lubrication regime in which surface asperity contact occurs simultaneously during the lubrication process. Predicting performance of components operating in this regime is important as the high asperity contact pressures can significantly reduce the fatigue life of the interacting components. Rolling contact fatigue is one of the most dominant causes of failure of components operating in mixed lubrication regime. Contact fatigue begins with the initiation of microscopic fatigue cracks in the rolling contact surfaces or within the sub-surface regions due to cyclic shear stresses. Investigation of mixed lubrication effects on performance of machine components is of significant importance in order to understand and enhance their load carrying capacity. This article investigates the effects of mixed lubrication and surface roughness on machine components performance. Results from a mixed lubrication model are utilized to investigate the effects of different operating conditions on fatigue life of the components. Simple rough surfaces consisting of single hemispherical bump as well as complex rough surfaces consisting of a numerically generated 3D rough surface operating under mixed lubrication conditions are studied and results presented. The stress-based Ioannides and Harris model incorporating the fatigue limit is used to evaluate the fatigue life variation. Fast Fourier Transform (FFT) technique is used to significantly reduce the time required for the computation of internal stresses.read more
Citations
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Journal ArticleDOI
Surface Texturing in Machine Elements − A Critical Discussion for Rolling and Sliding Contacts
Journal ArticleDOI
Effect of surface texturing on rolling contact fatigue within mixed lubricated non-conformal rolling/sliding contacts
TL;DR: In this paper, the effects of surface texturing on rolling contact fatigue (RCF) within non-conformal rolling/sliding contacts operated under mixed lubrication conditions were investigated.
Peer ReviewDOI
Numerical micro-texture optimization for lubricated contacts—A critical discussion
Journal ArticleDOI
Relative fatigue life prediction of high-speed and heavy-load ball bearing based on surface texture
TL;DR: In this paper, a new calculation method of relative fatigue life considering surface texture on high-speed and heavy-load ball bearing is presented, which shows transverse texture perpendicular to entrainment direction is helpful to form film because of the increasing hydrodynamic effect, and decrease the pressure and shear stress, but longitudinal texture has an opposite effect.
Journal ArticleDOI
A continuum damage mechanics finite element model for investigating effects of surface roughness on rolling contact fatigue
Steven J. Lorenz,Farshid Sadeghi,Hitesh K. Trivedi,Lewis Rosado,Mathew S. Kirsch,Chinpei Wang +5 more
TL;DR: In this article, a continuum damage mechanics (CDM) finite element (FE) model was developed to investigate the effects of surface roughness on rolling contact fatigue (RCF) life of non-conformal contacts.
References
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A Full Numerical Solution to the Mixed Lubrication in Point Contacts full numerical solution for the mixed elastohydrodynamic lubrication (EHL) in point
Yuan-Zhong Hu,Dong Zhu +1 more
TL;DR: In this article, a new numerical approach that is simple and robust, capable of handling three-dimensional measured engineering rough surfaces moving at different rolling and sliding velocities is presented.
Journal ArticleDOI
A Full Numerical Solution to the Mixed Lubrication in Point Contacts
Yuan-Zhong Hu,Dong Zhu +1 more
TL;DR: In this paper, a full numerical solution for the mixed elastohydrodynamic lubrication (EHL) in point contacts is presented, using a new numerical approach that is simple and robust, capable of handling three-dimensional measured engineering rough surfaces moving at different rolling and sliding velocities.