Search for dissertations about: "ehl"

Showing result 1 - 5 of 28 swedish dissertations containing the word ehl.

2. 1. EHL investigations using a hybrid technique : an experimental and numerical approach

   Author : Alexei Jolkin; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

   Abstract : This licentiate thesis deals with a hybrid experimental and numerical method, the so-called Hybrid Technique, to study film thickness and pressure distribution and to investigate the behaviour and properties of lubricants in highly loaded EHL conjunctions. The Hybrid Technique combines experimental studies and advanced numerical calculations. READ MORE

4. 2. Prediction of traction in EHL contacts operating in the linear isothermal region

   Author : Yuko Higashitani; Andreas Almqvist; Marcus Björling; Sanemasa Kawabata; Alessandro Ruggiero; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elastohydrodynamic lubrication EHL ; Friction; Traction; Modelling; Simulation; FEM; Rolling sliding; Elliptical; Machine Elements; Maskinelement;

   Abstract : The vehicle industry plays an important role in moving people and goods all over the world. Unfortunately, the vehicular transportation has a huge (negative) impact on the climate. Improved fuel-efficient vehicle technologies are therefore required to reduce emissions and address environmental concerns. READ MORE

5. 3. Film thickness measurements for the characterization of EHL contacts

   Author : John Lord; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

   Abstract : This licentiate thesis describes experimental techniques related to the investigation of elastohydrodynamic lubrication of point contacts as well as measurements and evaluation of results from laboratory tests. Elastohydrodynamic lubrication is one of the most severe forms of lubrication when a medium (often a liquid) is expected to separate two surfaces in a mechanical device under extremely high pressures and shear strain rates as well as with very thin lubricant films. READ MORE

6. 4. A hybrid technique for investigation of elastohydrodynamic lubrication

   Author : Alexei Jolkin; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

   Abstract : This doctoral thesis deals with a hybrid experimental and numerical method, the so-called Hybrid Technique, to study film thickness and pressure distribution and to investigate the behaviour and properties of lubricants in highly loaded elastohydrodynamically lubricated (EHL) conjunctions. The Hybrid Technique combines experimental studies and advanced numerical calculations. READ MORE

7. 5. Transient elastohydrodynamic lubrication : Effects of geometry, surface roughness, temperature, and plastic deformation

   Author : Tobias Hultqvist; Roland Larsson; Pär Marklund; Wassim Habchi; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

   Abstract : The urgent need to reduce greenhouse gas emissions in combination with an increased use of sustainable energy resources have led to immense efforts on improving energy efficiency of mechanical systems. Consequently, modern machine elements are typically lubricated with low viscosity oils and designed to endure an increasingly high power density. READ MORE