Abstract

The chapter includes laws of friction, friction coefficients, negative friction coefficient, friction in polymers and their composites, polymers, fillers (micro- and nanominerals, ceramic fillers, fibers, etc.), friction mechanism, recent experimental and theoretical research work on friction, friction coefficient, and wear rate under vertical and horizontal vibrations, the mathematical and empirical friction models, “Zaman number,” molecular–mechanical theory of friction, wet surface friction, friction between wet floors and shoe soles, friction on wet roads, the interaction between the road surface and rubber tires, the estimation of the surface roughness of tiles and the road surface. Road surface characteristics and friction mechanism, the friction coefficient between moving vehicles and road surfaces, friction coefficient by MICHELIN Technology are also discussed. A discussion on the Stribeck curve, scratch resistance in polymers/composites/coatings/films, models and mechanisms of scratch damage, and scratch hardness is also included. In addition, wear definition and its types, like adhesive, abrasive galling, fatigue, and fretting, general methods of polymer wear reduction, dimensional-analysis-based wear model, the “Asad number,” and mitigation of fretting wear and lubrication are also discussed.

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