Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Friction in Lubricated Contacts: from Macro- to Microscale Effects
Abstract The friction in hydrodynamically lubricated contacts, with the solid surfaces completely separated by an interposed lubricant, typically depends on load, speed and viscosity. By varying these quantities, different regimes of lubrication are usually considered, ranging from full hydrodynamic to boundary. Starting with hydrodynamic conditions, the value of the friction coefficient decreases by reducing velocity or viscosity or by increasing load till reaching certain limiting values. In this regime, a full fluid film occurs defined as the “fluid film lubrication”. An opposite effect occurs when the before mentioned quantities are varied in the so-called “mixed lubrication” regime, where load is shared between the contacting asperities and the lubricant film. Finally, the term “boundary lubrication” is used to describe the regime in which the film is reduced to absorbed molecular layers of lubricant on the surfaces of the solids.
Friction in Lubricated Contacts: from Macro- to Microscale Effects
Abstract The friction in hydrodynamically lubricated contacts, with the solid surfaces completely separated by an interposed lubricant, typically depends on load, speed and viscosity. By varying these quantities, different regimes of lubrication are usually considered, ranging from full hydrodynamic to boundary. Starting with hydrodynamic conditions, the value of the friction coefficient decreases by reducing velocity or viscosity or by increasing load till reaching certain limiting values. In this regime, a full fluid film occurs defined as the “fluid film lubrication”. An opposite effect occurs when the before mentioned quantities are varied in the so-called “mixed lubrication” regime, where load is shared between the contacting asperities and the lubricant film. Finally, the term “boundary lubrication” is used to describe the regime in which the film is reduced to absorbed molecular layers of lubricant on the surfaces of the solids.
Friction in Lubricated Contacts: from Macro- to Microscale Effects
Ciulli, E. (Autor:in)
01.01.2001
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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