Detail publikace

Optimized Mapping of Pressure in Lubricated Point Contacts Based on Measured Film Thickness

POLIŠČUK, R. VAVERKA, M. VRBKA, M. KŘUPKA, I. HARTL, M.

Originální název

Optimized Mapping of Pressure in Lubricated Point Contacts Based on Measured Film Thickness

Anglický název

Optimized Mapping of Pressure in Lubricated Point Contacts Based on Measured Film Thickness

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

čeština

Originální abstrakt

The surface topography plays significant role in lifetime of highly loaded machine parts with lubricated contacts. Many elements like gears, rolling bearings, cams and traction drives operate in mixed lubrication conditions, where the lubricant film behavior closely implies the main practical performance parameters such as friction wear, contact fatigue and scuffing. For prediction of wear and especially contact fatigue, the values and distribution of the pressure in rolling contact are often required. The usual theoretical approach based on numerical solution of physical-mathematical models built around the Reynolds equation can be extremely time consuming, especially when lubricant films are very thin, and contact load and required resolution very high. This study presents a further refined approach to our previously published experimental method, based on on inverse elasticity theory and fast convolution transformation between the lubricant film thickness map and the pressure distribution within the point contact. The experimental film thickness maps of EHD lubricated contacts with smooth and dented surfaces were processed using colorimetric interferometry and validated using numerical solution, in order to calibrate numerical parameters and to find limits of the new approach.

Anglický abstrakt

The surface topography plays significant role in lifetime of highly loaded machine parts with lubricated contacts. Many elements like gears, rolling bearings, cams and traction drives operate in mixed lubrication conditions, where the lubricant film behavior closely implies the main practical performance parameters such as friction wear, contact fatigue and scuffing. For prediction of wear and especially contact fatigue, the values and distribution of the pressure in rolling contact are often required. The usual theoretical approach based on numerical solution of physical-mathematical models built around the Reynolds equation can be extremely time consuming, especially when lubricant films are very thin, and contact load and required resolution very high. This study presents a further refined approach to our previously published experimental method, based on on inverse elasticity theory and fast convolution transformation between the lubricant film thickness map and the pressure distribution within the point contact. The experimental film thickness maps of EHD lubricated contacts with smooth and dented surfaces were processed using colorimetric interferometry and validated using numerical solution, in order to calibrate numerical parameters and to find limits of the new approach.

Klíčová slova

Tribology;Interferometry;Thin Films;Pressure mapping

Klíčová slova v angličtině

Tribology;Interferometry;Thin Films;Pressure mapping

Autoři

POLIŠČUK, R.; VAVERKA, M.; VRBKA, M.; KŘUPKA, I.; HARTL, M.

Rok RIV

2007

Vydáno

12. 11. 2007

Nakladatel

ASME

Místo

Seattle

ISBN

0-7918-3812-9

Kniha

Proceedings of the 2007 International Mechanical Engineering Congress & Exposition

Strany od

DVD

Strany počet

6