Tribology UNIT - I Historical background - Viscosity - Viscometry - Effect of temperature on viscosity - Effect of pressure in viscosity - Other physical properties of mineral oils - The generalized Reynolds equation - Flow and shear stress - The energy equation - The equation of state - Mechanism of pressure development. UNIT - II Circumferential Flow - Oil flow through a bearing having a circumferential oil groove - Heat generation and lubricant temperature - Heat balance and effective temperature - Bearing design: Practical considerations - Design of journal bearings - Parallel surface bearing - Step bearing - Some situations under squeeze film lubrication - The mechanism of hydrodynamic instability - Stiffness and damping coefficients - Stability. UNIT - III ELASTOHYDRODYNAMIC LUBRICATION: Theoretical consideration - Grubin type solution - Accurate solution - Point contact - Dimensionless parameters - Film thickness equations - Different regimes in EHL contact - Deep-groove radial bearings - Angular contact bearings - Thrust ball bearings - Geometry - Kinematics - Stress and deformations - Load capacity. UNIT - IV Surface Topography - Surface characterization - Apparent and real area of contact - Derivation of average Reynolds equation for partially lubricated surface - Effect of surface roughness on journal bearings UNIT - V Laws of friction - Friction theories - Surface contaminants - Frictional heating - Effect of sliding speed on friction - Classification of wear - Mechanisms of wear - Quantitative laws of wear - Wear resistance materials. REFERENCES: 1. Introduction to Tribology of Bearings / Majumdar, B.C. 2. Friction. Wear, Lubrication : A Text book in Tribology/Kenneth C Ludema /CRC Press /1 st Edition 3. Engineering Tribology / John Williams / Cambridge University Press / 2005 4. Introduction to Tribology / Bharat Bhushan / Wiley / 2 nd Edition 5. Engineering Tribology / Prasanta Sahoo / PHI Learning 6. Engineering Tribology / Stachowiak & Batchelor / Butterworth – Heinimann / 2005
TribologyUNIT - IHistorical background - Viscosity - Viscometry
- Effect of temperature on viscosity - Effect of pressure in
viscosity - Other physical properties of mineral oils - The
generalized Reynolds equation - Flow and shear stress - The energy
equation - The equation of state - Mechanism of pressure
development.UNIT - IICircumferential Flow - Oil flow through a
bearing having a circumferential oil groove - Heat generation and
lubricant temperature - Heat balance and effective temperature -
Bearing design: Practical considerations - Design of journal
bearings - Parallel surface bearing - Step bearing - Some
situations under squeeze film lubrication - The mechanism of
hydrodynamic instability - Stiffness and damping coefficients -
Stability.UNIT - IIIELASTOHYDRODYNAMIC LUBRICATION: Theoretical
consideration - Grubin type solution - Accurate solution - Point
contact - Dimensionless parameters - Film thickness equations -
Different regimes in EHL contact - Deep-groove radial bearings -
Angular contact bearings - Thrust ball bearings - Geometry -
Kinematics - Stress and deformations - Load capacity.UNIT -
IVSurface Topography - Surface characterization - Apparent and real
area of contact - Derivation of average Reynolds equation for
partially lubricated surface - Effect of surface roughness on
journal bearingsUNIT - VLaws of friction - Friction theories -
Surface contaminants - Frictional heating - Effect of sliding speed
on friction - Classification of wear - Mechanisms of wear -
Quantitative laws of wear - Wear resistance materials.REFERENCES:1.
Introduction to Tribology of Bearings / Majumdar, B.C.2. Friction.
Wear, Lubrication : A Text book in Tribology/Kenneth C Ludema /CRC
Press /1st Edition3. Engineering Tribology / John Williams /
Cambridge University Press / 20054. Introduction to Tribology /
Bharat Bhushan / Wiley / 2nd Edition5. Engineering Tribology /
Prasanta Sahoo / PHI Learning6. Engineering Tribology / Stachowiak
& Batchelor / Butterworth Heinimann / 2005
