Tribology is the tribology in machine design pdf and engineering of interacting surfaces in relative motion. It includes the study and application of the principles of friction, lubrication and wear.
Tribology is highly interdisciplinary in nature and draws upon several academic areas including: physics, chemistry, materials science and engineering. It was coined by Peter Jost in 1966, who produced an eponymous report which highlighted the cost of friction, wear and corrosion to the UK economy. According to da Vinci, the frictional resistance was the same for two different objects of the same weight but making contacts over different widths and lengths.
He also observed that the force needed to overcome friction doubles when the weight doubles. However, da Vinci’s findings remained unpublished in his notebooks. Although not universally applicable, these simple statements hold for a surprisingly wide range of systems.