Tribology (Dept Elec - III) (2181926)  


Sr. Topics Teaching Hours Module Weightage
Introduction to Tribology:
Introduction to tribology and Factors influencing Tribological phenomena, Properties of materials relevant to friction and wear,
5 %
Surfaces, Friction and Wear:
Engineering surfaces - Surface characterization, Contact of engineering surfaces: Hertzian and nonhertzian contact, Contact pressure and deformation in non-conformal contacts. Causes of friction, Stick-slip friction behaviour and friction instability, sliding and rolling friction, frictional heating and temperature rise, Friction measurement techniques. Wear and wear types, Mechanisms of wear, Wear of metals and non-metals. Wear models - asperity contact, constant and variable wear rate, geometrical influence in wear models, wear damage. Wear in various mechanical components, wear measurement and controlling techniques.
30 %
Lubricants and their physical properties, types of additives, extreme pressure lubricants, recycling of used oils and oil conservation, oil emulsion, Selection of Lubricants, Hydrodynamic lubrication: Reynolds Equation, Infinite bearing, short bearing Elastohydrodynamic Lubrication: Principle and application, pressure - viscosity term in Reynold„s equation, Hertz theory, Ertel-Grubin Equation. Gas lubrication: Introduction, merits and demerits, applications. Lubrication in metal working: Rolling, forging, drawing and extrusion. Bearing materials, bearing constructions, oil seals, shields and gaskets
30 %
Design of Tribological Elements:
Tribological consideration in design, Mechanisms of tribological failures in machines, Design Hydrodynamic bearings, and Performance analysis of gears, seals, piston rings, machine tool slide ways, cams and follower. Surface Engineering for Wear and Corrosion resistance: Diffusion, coating, electro and electro-less plating, hot deep coating, metal spraying, cladded coating, crystallizing coating, selection of coating for wear and corrosion resistance, potential properties and parameters of coating
35 %