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Hertz contact of two spheres

Hertzian contact theory

29.10.2017 tribonet

Hertzian contact stress Hertzian contact theory is a classical theory of contact mechanics and is a very useful tool for engineers and researchers. Even though the derivation of the theory is relatively difficult, the final […]

Grease

Grease

22.05.2017 tribonet

The ASTM definition of lubricating grease is: “A solid or semi-solid lubricant consisting of a thickener agent in a liquid lubricant. Other ingredients imparting special properties may be included” A commercial lubricating grease usually consists […]

Industrial Lubrication

What Are Lubricants?

17.04.2017 tribonet

Definition Lubricant is a substance which is used to control (more often to reduce) friction and wear of the surfaces in a contact of the bodies in relative motion. Depending on its nature, lubricants are […]

Worn Steel Disk

Archard Wear Equation

04.04.2017 tribonet

The importance of wear losses leads to considerable effort in establishing theories and predictive models of wear. Meng and Ludema  [1] have identified 182 equations for different types of wear. Among them were empirical relations, […]

Elastic Deformation

Elastic Deformation

16.02.2017 tribonet

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 […]