Engineering Tribology.

Format:

Book

Author/Creator:

Stachowiak, Gwidon.

Contributor:

Batchelor, A. W. (Andrew W.)

Language:

English

Physical Description:

1 online resource (903 pages)

Edition:

5th ed.

Place of Publication:

Chantilly : Elsevier Science & Technology, 2025.

Summary:

Engineering Tribology, Fifth Edition takes an interdisciplinary approach to key concepts and engineering implications of tribology, bringing together the relevant knowledge needed from different fields to achieve effective analysis and control of friction and wear.

Contents:

Cover

ENGINEERING TRIBOLOGY

Copyright

Dedication

Contents

Preface

Acknowledgements

1 INTRODUCTION

1.1 Background

1.2 Meaning of tribology

Lubrication

Wear

1.3 Cost of friction and wear

1.4 Summary

Revision questions

References

2 PHYSICAL PROPERTIES OF LUBRICANTS

2.1 Introduction

2.2 Oil viscosity

Dynamic viscosity

Kinematic viscosity

2.3 Viscosity temperature relationship

Viscosity-temperature equations

Viscosity-temperature chart

2.4 Viscosity index

2.5 Viscosity pressure relationship

2.6 Viscosity-shear rate relationship

Pseudoplastic behavior

Thixotropic behavior

2.7 Viscosity measurements

Capillary viscometers

Rotational viscometers

Rotating cylinder viscometer

Cone on plate viscometer

Other viscometers

2.8 Viscosity of mixtures

2.9 Oil viscosity classification

SAE viscosity classification

ISO viscosity classification

2.10 Lubricant density and specific gravity

2.11 Thermal properties of lubricants

Specific heat

Thermal conductivity

Thermal diffusivity

2.12 Temperature characteristics of lubricants

Pour point and cloud point

Flash point and fire point

Volatility and evaporation

Oxidation stability

Thermal stability

2.13 Other lubricant characteristics

Surface tension

Neutralization number

Carbon residue

2.14 Optical properties of lubricants

Refractive index

2.15 Additive compatibility and solubility

Additive compatibility

Additive solubility

2.16 Electrical properties of lubricants

2.17 Lubricant impurities and contaminants

Water content

Sulphur content

Ash content

Chlorine content

2.18 Solubility of gases in oils

2.19 Summary

3 LUBRICANTS AND THEIR COMPOSITION

3.1 Introduction

3.2 Mineral oils.

Sources of mineral oilsSources of mineral oils

Manufacture of mineral oils

Types of mineral oils

Chemical forms

Viscosity

3.3 Synthetic oils

Manufacturing of synthetic oils

Hydrocarbon synthetic lubricants

Polyalphaolefins

Polyphenyl ethers

Esters

Cycloaliphatics

Polyglycols

Silicon analogues of hydrocarbons

Silicones

Silahydrocarbons

Organohalogens

Perfluoropolyethers

Chlorofluorocarbons

Chlorotrifluoroethylenes

Perfluoropolyalkylethers

Cyclophosphazenes

3.4 New developments in synthetic lubricants

Ionic liquid lubricants

Mesogenic lubricants

3.5 Emulsions and aqueous lubricants

Manufacturing of emulsions

Characteristics

Applications

Polyelectrolyte lubricants

3.6 Greases

Manufacturing of greases

Composition

Base oils

Thickener

Additives

Fillers

Lubrication mechanism of greases

Grease characteristics

Consistency of greases

Mechanical stability

Drop point

Evaporation loss

Grease viscosity characteristics

Classification of greases

Grease compatibility

Degradation of greases

3.7 Lubricant additives

Wear and friction improvers

Adsorption or boundary additives

Antiwear additives

Extreme-pressure additives

Nanoparticle additives

Anti-oxidants

Oil oxidation

Oxidation inhibitors

Corrosion control additives

Contamination control additives

Viscosity improvers

Pour point depressants

Foam inhibitors

Interference between additives

3.8 Summary

4 HYDRODYNAMIC LUBRICATION

4.1 Introduction

4.2 Reynolds equation

Simplifying assumptions

Equilibrium of an element

Continuity of flow in a column

Simplifications to the Reynolds equation.

Unidirectional velocity approximation

Steady film thickness approximation

Isoviscous approximation

Infinitely long bearing approximation

Narrow bearing approximation

Bearing parameters predicted from Reynolds equation

Pressure distribution

Load capacity

Friction force

Coefficient of friction

Lubricant flow

Summary

4.3 Pad bearings

Infinite linear pad bearing

Bearing geometry

Lubricant flow rate

Infinite Rayleigh step bearing

Other wedge geometries of infinite pad bearings

Tapered land wedge

Parabolic wedge

Parallel surface bearings

Spiral groove bearing

Bearings with surface textures

Finite pad bearings

Pivoted pad bearing

Inlet boundary conditions in pad bearing analysis

4.4 Converging-diverging wedges

Full-Sommerfeld boundary condition

Half-Sommerfeld boundary condition

Reynolds boundary condition

4.5 Journal bearings

Evaluation of the main parameters

Practical and operational aspects of journal bearings

Lubricant supply

Cavitation

Journal bearings with movable pads

Journal bearings incorporating a Rayleigh step

Oil whirl or lubricant caused vibration

Rotating load

Tilted shafts

Partial bearings

Elastic deformation of the bearing

Infinitely long approximation in journal bearings

4.6 Thermal effects in bearings

Heat transfer mechanisms in bearings

Conduction

Convection

Conducted/convected heat ratio

Isoviscous thermal analysis of bearings

Iterative method

Constant flow method.

Non-isoviscous thermal analysis of bearings with locally varying viscosity

Multiple regression in bearing analysis

Bearing inlet temperature and thermal interaction between pads of a Michell bearing

4.7 Limits of hydrodynamic lubrication

4.8 Hydrodynamic lubrication with non-Newtonian fluids

Turbulence and hydrodynamic lubrication

Hydrodynamic lubrication with non-Newtonian lubricants

Inertia effects in hydrodynamics

Compressible fluids

Compressible hydrodynamic lubrication in gas bearings

4.9 Reynolds equation for squeeze films

Squeeze time

Cavitation and squeeze films

Microscopic squeeze film effects between rough sliding surfaces

4.10 Porous bearings

4.11 Summary

5 COMPUTATIONAL HYDRODYNAMICS

5.1 Introduction

5.2 Non-dimensionalization of the Reynolds equation

5.3 The Vogelpohl parameter

5.4 Finite difference equivalent of the Reynolds equation

Definition of solution domain and boundary conditions

Calculation of pressure field

Calculation of dimensionless friction force and friction coefficient

Numerical solution technique for Vogelpohl equation

5.5 Numerical analysis of hydrodynamic lubrication in idealized journal and partial arc bearings

Example of data from numerical analysis, the effect of shaft misalignment

5.6 Numerical analysis of hydrodynamic lubrication in a real bearing

5.6.1 Thermohydrodynamic lubrication

Governing equations and boundary conditions in thermohydrodynamic lubrication

Governing equations in thermohydrodynamic lubrication for a one-dimensional bearing

Thermohydrodynamic equations for the finite pad bearing

Boundary conditions

Finite difference equations for thermohydrodynamic lubrication.

Treatment of boundary conditions in thermohydrodynamic lubrication

Computer program for the analysis of an infinitely long pad bearing in the case of thermohydrodynamic lubrication

Example of the analysis of an infinitely long pad bearing in the case of thermohydrodynamic lubrication

5.6.2 Elastic deformations in a pad bearing

Computer program for the analysis of an elastically deforming onedimensional pivoted Michell pad bearing

Effect of elastic deformation of the pad on load capacity and film thickness

5.6.3 Cavitation and film reformation in grooved journal bearings

Computer program for the analysis of grooved 360° journal bearings

Example of the analysis of a grooved 360° journal bearing

5.6.4 Vibrational stability in journal bearings

Determination of stiffness and damping coefficients

Computer program for the analysis of vibrational stability in a partial arc journal bearing

Example of the analysis of vibrational stability in a partial arc journal bearing

5.7 Computational evaluation of cavitation effects in hydrodynamic bearings

5.8 Summary

6 HYDROSTATIC LUBRICATION

6.1 Introduction

6.2 Hydrostatic bearing analysis

Flat circular hydrostatic pad bearing

Friction torque

Friction power loss

Non-flat circular hydrostatic pad bearings

6.3 Generalized approach to hydrostatic bearing analysis

Flat circular pad bearings

Flat square pad bearings

6.4 Optimization of hydrostatic bearing design

Minimization of power

Low-speed recessed bearings

High-speed recessed bearings

Control of lubricant film thickness and bearing stiffness

Stiffness with constant flow method.

Stiffness with capillary restrictors.

Notes:

Description based on publisher supplied metadata and other sources.

ISBN:

9780443341502

0443341508

OCLC:

1511104586