Alpay Teoman Yıldız 030050014 - 8th week

Hydro-dynamic bearings:

In hydrodynamic bearings, its generation relies only on the geometry and motion of the surface (hence the term dynamic) together with the viscous nature of fluid. The second role of the lubricant may be to generate an additional thin, protective coating on one or both of the solid surfaces, preventing, or at least limiting, the formation of strong, adhesive and so potentially damaging friction juctions between the underlying solids at locations of particularly acute loading.

Williams J.A., Engineering Tribology, p.232

Kudinov's Expression:

It is a well-known fact that, in general, the cutting force consists of forces acting on the tool face and on the tool flank. Kudinov derives his dynamic cutting force expressions for two cases:
1- The cutting force is determined only by forces acting on the tool face; this occurs, for instance, during machining of nonhardened steels with a sharp cutting tool
2- The cutting force is determmined by forces acting on the tool face as well as the tool flank.This obviously is a more general case which one may often come across while machining with a worn tool.

Mehta, Machine Tool Design and Numerical Control, p.307

Electromagnetic Cluthes:

The rear axle differential, center differential, and transfer case on some vehicles are equipped with electromagnetic clothes for lockup the differential. The clutch may be controlled by a switch or by a traction control computer. When one wheel or axle loses traction and speeds up, the computer energizees the clutch, which locks up the differential and provides equal power to both wheels or axles. The electromagnetic clutch of an  actuator coil, an armature, and a stack of steel clutch plates. When the clutch is energized, a magnetic field is produced to compress the cluthes, thereby locking the differential.

Erjavec J., Manuel Transmissions & Transaxles, p.471

Abrasive Wear:

Abrasive wear is defined as wear due to hard particles or hard protuberances forced against and moving along a solid surface. This form of wear in metals is most frequently caused by non-metallic materials, but metallic particles can also cause abrasion. Generally, a material is seriously abraded or scrached only by a particle harder than itself.

Davis R.J., Surface Engineering for Corrosion and Wear Resistance, p.56