Credits: 4 (3-0-2)
Description
Introduction: surface topography and its 2-D and 3-D characterizations, interactions of surfaces, friction, wear, lubrication; Regimes of lubrication: hydrodynamic, elastohydrodynamic, mixed, boundary, Stribeck curve; Lubricant: mineral oil, synthetic oil, grease, emulsions, gases, properties of lubricants, various rheology models; Derivation of governing equations: conservations of mass, momentum, energy, establishing 3-D Reynolds equation and energy equation for lubrication simulations; Cavitation and turbulence models; Contact mechanics: 2-D and 3-D contacts, surface and subsurface stresses, asperity contact models, elastic deformation at contacts; Applications of governing equations in design and performance analysis of journal bearings, thrust bearings, squeeze film bearings, hydrostatic bearings, rolling bearings, gear sets, seals, and piston rings; Lubrication in metal forming; Dynamic coefficients: stiffness and damping calculations, rotor vibrations, oil-whirl instability, and friction instabilities; Failure analysis of lubricated contacts/interfaces, Immerging technology: surface textures and bionic surfaces.