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The science and engineering of interacting surfaces in relative motion.

Methods used to reduce friction and wear between moving parts.

A foundational component of tribology studies.

First lecture on lubrication.

Focus on mechanisms and applications for lubrication.

The science of interacting surfaces in relative motion, encompassing friction, lubrication, and wear.

Resistance to relative motion between contacting surfaces.

The process of reducing friction between surfaces in relative motion.

Deterioration of a material due to interaction with another material owing to friction and/or impacts.

The motion of one object with respect to another object.

The study of friction, wear, and lubrication in interacting surfaces.

A force that opposes motion between two surfaces in contact.

The gradual loss of material from a surface due to friction.

The process of reducing friction and wear between surfaces by introducing a substance (lubricant).

Different ways lubricants reduce friction and wear, like fluid film lubrication.

Bearings with rolling elements (like balls or rollers) for low friction and high load capacity.

Lubrication where the lubricant film is squeezed and deformed by the interacting surfaces.

Bearings that use a layer of lubricant to separate moving parts, reducing friction.

Methods to keep rolling element bearings properly lubricated for smooth operation.

Mathematical formulas describing elastohydrodynamic lubrication.

Contact surfaces with a large area of contact, like journal bearings.

Contact surfaces with a small area of contact, like rolling element bearings and gears.

A type of thick film lubrication where positive pressure is generated by relative motion, bearing surface convergence, and lubricant viscosity.

A type of hydrodynamic bearing where the pressure is generated by the relative motion of surfaces.

A type of hydrodynamic lubrication where positive pressure arises from surfaces coming together.

A type of thick film lubrication where lubricant is forced into the clearance space with high pressure from an external source.

The smallest distance between the surfaces in a bearing.

Lubrication with a noticeable film thickness, unlike boundary.

Elasto-hydrodynamic lubrication with non-conformal surfaces, high pressure (approx. 1 GPa), where elastic and viscous effects are important, and high elastic modulus materials are used.

Elasto-hydrodynamic lubrication with non-conformal surfaces, low pressure (approx. 1 MPa), with elastic properties dominating, and low elastic modulus materials.

Thin film lubrication where the lubricant film is very thin (1-10 nm). The frictional characteristics depend upon the solids and the thin surface lubricant film.

The smallest distance between moving surfaces in lubrication, affected by load, velocity, viscosity, pressure viscosity coefficient and elastic modulus of materials.

A lubrication mechanism where both elastic deformation and viscous effects of the lubricant film are crucial

A lubrication mechanism where portions of the surfaces are in both fluid film lubrication and boundary lubrication.

Type of lubrication mechanism with a thin layer of lubricant between surfaces, thickness is approximately 0.001 to 0.01 μm.

A parameter used to describe the lubricating film's condition during different lubrication mechanisms (e.g soft and hard EHL).