Sökning: "Coefficient of Friction"
Visar resultat 16 - 20 av 169 avhandlingar innehållade orden Coefficient of Friction.
16. Friction in elasto hydrodynamically lubricated contacts : the influence of speed and slide to roll ratio
Sammanfattning : Reducing losses in transmissions has become a high priority in the automotive market during recent years, mainly due to environmental concerns leading to regulations placed on the automotive industry to drive the development of vehicles with lower fuel consumption and CO2 emissions. Rising fuel prices and increasing environmental concerns have also made customers more prone to purchase more fuel efficient vehicles. LÄS MER
17. Snow contamination of cars: Collisions of ice particles with surfaces
Sammanfattning : Seasonal snow cover on roads causes car accidents that lead to human suffering and economic loss. Snow cover decreases visibility and road-tire friction. Advanced active safety systems have been developed to cope with sudden changes in driving conditions and have been engineered to act as quickly as possible. LÄS MER
18. Aspects of Sorption Processes in Thermosiphon and in Falling Film Arrangements
Sammanfattning : A study concerning closure relations pertinent to the design of sorption equipment of absorption heat pumps has been undertaken. Specifically, thermosiphon and vertical falling film arrangements were studied. LÄS MER
19. Prediction of traction in EHL contacts operating in the linear isothermal region
Sammanfattning : 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. LÄS MER
20. Self Lubrication on the Atomic Scale : Design, Synthesis and Evaluation of Coatings
Sammanfattning : In this thesis a new design concept of tribologically active coatings aimed for low friction applications, have been explored. Materials modeled by ab initio DFT calculations were realized through deposition of carbide and nanocomposite coatings by DC-magnetron sputtering. LÄS MER