Surface Roughness Effects for Newtonian and Non-Newtonian Lubricants
Journal Title: Tribology in Industry - Year 2019, Vol 41, Issue 1
Abstract
In the present study, a numerical solution is presented to investigate the combined effects of lubricant rheology and surface roughness parameters on the characteristic of elastohydrodynamic lubrication problem for point contact. Sinusoidal waviness for surface roughness is considered to show the effect of changing amplitude and wavelength on the film thickness and pressure profile. The results show that, surface waviness leads to random fluctuations of pressure and film thickness for both modes of lubricant of Newtonian and non-Newtonian. As the amplitude of the waviness increase, the more fluctuations of pressure profile and film profile occur. Changing the wavelength of wavy surface shows that the amplitude of the pressure fluctuation becomes a little more remarkable as wavelength increase. The difference between Newtonian and non-Newtonian lubricant is that the non-parallel film shape in the contact region occurs for non-Newtonian model in addition to the reduction in film thickness compared to the Newtonian model.
Authors and Affiliations
M. F. Abd Al-Samieh
Keywords
Related Articles
- EP ID EP574751
- DOI 10.24874/ti.2019.41.01.07
- Views 53
- Downloads 0
Tribology Database as Platform for Mobile Database and use of Mobile Technologies
In the last few years changes in information technologies, are numerous and dynam. One of those changes is the massive use of mobile devices. They have not only been used for communication, but also for access to applica...
Development of Zn50 Brazing Alloy for Joining Mild Steel to Mild Steel (SAE1018)
This work has developed new brazing alloys for joining mild steel to mild steel (SAE1018) at a lower temperature. The alloys blends and error analysis were done by experimental design software (Design Expert 8.0.7.1). De...
Investigation of Mixture of Vegetable Oil and Synthetic Esters as Environmentally Friendly Base Stock for Low-temperature Lubrication Applications
Environmental issues are of great importance in all the areas of industry and transport. Usage of environmentally friendly, easily biodegradable lubricants has a benefit, when the oil can get into environment by using to...
Development of Entada Mannii Fiber Polypropylene Matrix Composites for Light Weight Applications
This study investigates the use of Entada mannii fiber as potential reinforcement of thermoplastic composites suitable for light weight applications. Composites of 5 wt.%, 10 wt.% and 15 wt.% were produced by compression...
ANN & ANFIS Models for Prediction of Abrasive Wear of 3105 Aluminium Alloy with Polyurethane Coating
The quest for safety and reliability has increased significantly after Industrial revolution, so is the case for coating industries. In this paper 3105 Aluminium alloy sheet is coated with organic polyurethane coating. A...