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RISEffects of Asperities in Elastohydrodynamic Lubrication
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Optical interferometry was used to study rough surfaces under lubricated point contact. Three dimensional “asperities” of chromium were sputtered onto a steel ball which was run against a smooth ...
Effects of Thermal Conductivity of Contacting Surfaces on Point EHL Contacts
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: With actual and virtual materials, the effects of the thermal conductivity of contacting surfaces on EHL are investigated through experimental analyses using the optical interferometry technique ...
Formation Mechanism of Steady Multi-Dimples in Thermal EHL Point Contacts
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: With optical interferometry technique, an interesting multi-dimple phenomenon has been discovered under pure-sliding conditions in the point contact between a glass disk and a 3-inch diameter steel ...
Pumping Action of Aligned Smooth Face Seals Due to Axial Vibrations-Experiment
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The mechanism of pumping action caused by axially vibrating one of the seal faces with continuous parallel film thickness is clarified experimentally. The results obtained in the experiment ...
Local Reduction in Thickness of Point Contact EHL Films Caused by a Transversely Oriented Moving Groove and Its Recovery
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Transient behavior of elastohydrodynamic (EHL) films caused by a transversely oriented groove passing through the EHL conjunction is directly observed using the optical interferometry technique. A ...
Propagation of Semi-Elliptical Surface Cracks in Lubricated Rolling/Sliding Elliptical Contacts
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this paper the three-dimensional mixed mode stress intensity factors for semi-elliptical inclined cracks formed on elliptical Hertzian contact surfaces are calculated. This analysis accounts for ...
Optical Interferometric Observations of the Effects of a Bump on Point Contact EHL
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effects of surface kinematic conditions on micro-elastohydrodynamic lubrication (micro-EHL) are investigated under rolling and/or sliding point contact conditions using the optical interferometry ...
Thermal and Non-Newtonian Numerical Analyses for Starved EHL Line Contacts
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper focuses on the mechanism of starvation and the thermal and non-Newtonian behavior of starved elastohydrodynamic lubrication (EHL) in line contacts. It has been found that for a starved ...
Growth Mechanism of Subsurface Crack Due to Hertzian Contact
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The variations of three-dimensional mixed mode stress intensity factors for a circular crack under a Hertzian contact pressure moving over the surface are calculated by taking into account both ...
Impact Micro-Elastohydrodynamics in Point Contacts
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The influences of a single bump (dent) or regularly arranged bumps (dents) on the film thickness in impact circular elasthydrodynamic lubrication (EHL) contacts lubricated with a Newtonian lubricant ...