Stribeck Curve
Stribeck curve is a fundamental and one of the most widely known concepts in tribology and lubrication fields. The concept represents the friction behavior in lubricated contacts as a function of viscosity of the lubricant, […]
Tribology Wiki
Tribology Wikipedia has the same goal as the well-known Wikipedia: share knowledge from around the globe and create an encyclopedia accessible to anyone. Of course, Tribology Wiki has an emphasis in Tribology! Everyone is invited to read, write, edit and share Wikis. Please contact us via email if you would like to contribute an article or if you have any suggestions! You can create an article by going to Create New tab in any of the existing articles (you must be logged-in)
What is EHD film thickness?
Surprisingly, when two lubricated solids are heavily loaded against one another and when a motion is applied to the solids surfaces, these two solids may not be touching one another (see Figure 1, left)! This […]
Bio-Inspired Surface Replication
Replicating the complex surface topographies of nature Approximately more than 400 million years of land plants evolution led to a vast diversity of structures on plant surfaces [1]. The surfaces of plant leaves are rarely […]
Tribochemistry
Boundary Lubrication Boundary lubrication is the lubrication regime where the interface behaviour is dominated by chemical reactions that happen at the surfaces, tribofilm formation occurs, and the load is carried by the asperities. In the boundary lubrication regime the […]
Environmentally Acceptable Lubricants
Since the early 1970s, the usage of Environmentally Acceptable Lubricants (EALs) in the industry started to grow and different sectors started investing in the development of EALs, e.g. development of EAL hydraulic fluids for forestry […]
Plastic Deformation at Microscale
What is plastic deformation? Plastic deformation, in general, can be defined as a permanent deformation, a non-reversible change in the geometry of a body under applied stresses (forces). For example, if hit sufficiently hard by […]
Boundary Lubrication
What is Boundary Lubrication? Boundary lubrication describes situations where the applied load is primarily supported by contacting solid asperities, rather than a liquid lubricant. The boundary lubrication regime acts when the lambda ratio (the ratio […]
Pressure-Viscosity Coefficient and Characteristics of Lubricants
Primary purpose of any industrial lubricant is to maintain a satisfactory lubricating film in between contacting surfaces; and importance of viscosity to achieve this is univocally known in industrial maintenance practices. However, what is often […]
Oil Viscosity Index and Viscosity Temperature Relation
Temperature – Viscosity Relation Viscosity is a measure of a lubricating oil’s resistant to flow. It is well-known from Hydrodynamic Lubrication Theory that viscosity plays a central role in the lubrication regime encountered in the […]
Surface Fatigue
What is surface fatigue? Surface fatigue is the failure on the top layer of a body due to repeated loading. It can be differentiated from other types as it only occurs on the surface. It […]