Tribology Wiki

Tribo Wiki 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, add, edit and share Wikis.
Hydrodynamic Lubrication

Hydrodynamic Lubrication

16.02.2017 tribonet 226 Views 0
Definition Hydrodynamic lubrication theory is a theory used to reduce friction and/or wear of rubbing solids with the aid of liquid lubricant. The lubricant penetrates into the contact zone between rubbing solids and creates a […]
Elastic Deformation

Elastic Deformation

16.02.2017 tribonet 180 Views 0
Definition Elastic deformation is a change of the shape of the body as a reaction to applied stress. This deformation is only temporary and once the stress is released, the undeformed shape of the body […]


14.02.2017 tribonet 81 Views 0
Tribometers are the devices used to analyze and characterize tribological systems. The most common direct measurement is the measurement of friction coefficient (and shear strength). During the post processing stage other quantities can be measured, […]

Friction Coefficients

09.02.2017 tribonet 185 Views 0
Friction Coefficients of Solid Lubricants, Metals and Antifriction Materials Table of friction coefficients of various materials in atmosphere and vacuum (see the definition of friction coefficient). The data was collected from various sources [1,2]. Material […]
Friction Coefficient

Coefficient of Friction

06.02.2017 tribonet 201 Views 0
Friction is a force resisting relative motion and may occur at the interface between the bodies, but may also occur within the bodies. The concept of friction coefficient was first formulated by Leonardo da Vinci […]
EHL film meniscus

Elastohydrodynamic Lubrication (EHL)

05.02.2017 tribonet 354 Views 0
Definition of EHL Elastohydrodynamic Lubrication – or EHL – is a type of lubrication under conditions of significant elastic deformation of the surfaces due to developed pressure which considerably affects the separating lubricant film. The […]
Fatigue Surface Crack

Rolling Contact Fatigue

25.01.2017 Aydar Akchurin 256 Views 0
Rolling-contact fatigue (RCF) is defined as a failure or material removal driven by crack propagation caused by the near-surface alternating stress field.  It is typically considered that if a bearing is properly mounted, aligned, lubricated, […]
Osborne Reynolds

Generalized Reynolds Equation: Derivation

14.01.2017 tribonet 290 Views 0
Reynolds equation is one of the fundamental equations of lubrication theory and tribology. In the simplest case, it considers incompressible and Newtonian lubricant. This model is sufficient to describe lubricant friction in some cases (relatively […]
Fatigue Wear

Fatigue Wear

08.01.2017 tribonet 233 Views 0
Fatigue wear is a type of wear where a number of cycles is needed to generate debris. The fatigue process in metals may induce the generation of surface and subsurface cracks, which after a critical […]