Machine Design / Edition 5

Machine Design / Edition 5

by Robert L. Norton
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Machine Design / Edition 5

For courses in Machine Design or anyone interested in understanding the theory behind Machine Design.

An integrated, case-based approach to Machine Design

Machine Design, 5e presents the subject matter in an up-to-date and thorough manner with a strong design emphasis. This book emphasizes failure theory and analysis as well as the synthesis and design aspects of machine elements. The book points out the commonality of the analytical approaches needed to design a wide variety of elements and emphasizes the use of computer-aided engineering as an approach to the design and analysis of these classes of problems.

Product Details

ISBN-13: 9780133356717
Publisher: Pearson
Publication date: 09/20/2013
Edition description: New Edition
Pages: 1104
Sales rank: 83,657
Product dimensions: 8.40(w) x 10.00(h) x 1.70(d)

Table of Contents


Part I Fundamentals

Chapter 1 Introduction to Design

1.1 Design

Machine Design



1.2 A Design Process

1.3 Problem Formulation and Calculation

Definition Stage

Preliminary Design Stage

Detailed Design Stage

Documentation Stage

1.4 The Engineering Model

Estimation and First-Order Analysis

The Engineering Sketch

1.5 C omputer-Aided Design and Engineering

Computer-Aided Design (CAD)

Computer-Aided Engineering (CAE)

Computational Accuracy

1.6 The Engineering Report

1.7 Factors of Safety and Design Codes

Factor of Safety

Choosing a Safety Factor

Design and Safety Codes

1.8 Statistical Considerations

1.9 Units

1.10 Summary

1.11 References

1.12 Web References

1.13 Bibliography

1.14 Problems

Chapter 2 Materials and Processes

2.0 Introduction

2.1 Material-Property Definitions

The Tensile Test

Ductility and Brittleness

The Compression Test

The Bending Test

The Torsion Test

Fatigue Strength and Endurance Limit

Impact Resistance

Fracture Toughness

Creep and Temperature Effects

2.2 The Statistical Nature of Material Properties

2.3 Homogeneity and Isotropy

2.4 Hardness

Heat Treatment

Surface (Case) Hardening

Heat Treating Nonferrous Materials

Mechanical Forming and Hardening

2.5 Coatings and Surface Treatments

Galvanic Action


Electroless Plating


Plasma-Sprayed Coatings

Chemical Coatings

2.6 General Properties of Metals

Cast Iron

Cast Steels

Wrought Steels

Steel Numbering Systems




Copper Alloys

2.7 General Properties of Nonmetals




2.8 Selecting Materials

2.9 Summary

2.10 References

2.11 Web References

2.12 Bibliography

2.13 Problems

Chapter 3 Kinematics and Load Determination

3.0 Introduction

3.1 Degree of Freedom

3.2 Mechanisms

3.3 Calculating Degree of Freedom (Mobility)

3.4 Common 1-DOF Mechanisms

Fourbar Linkage and the Grashof Condition

Sixbar Linkage

Cam and Follower

3.5 Analyzing Linkage Motion

Types of Motion

Complex Numbers as Vectors

The Vector Loop Equation

3.6 Analyzing the Fourbar Linkage

Solving for Position in the Fourbar Linkage

Solving for Velocity in the Fourbar Linkage

Solving for Acceleration in the Fourbar Linkage

3.7 Analyzing the Fourbar Crank-Slider

Solving for Position in the Fourbar Crank-Slider

Solving for Velocity in the Fourbar Crank-Slider

Solving for Acceleration in the Fourbar Crank-Slider

Other Linkages

3.8 Cam Design and Analysis

The Timing Diagram

The svaj Diagram

Polynomials for the Double-Dwell Case

Polynomials for the Single-Dwell Case

Pressure Angle

Radius of Curvature

3.9 Loading Classes For Force Analysis

3.10 Free-body Diagrams

3.11 Load Analysis

Three-Dimensional Analysis

Two-Dimensional Analysis

Static Load Analysis

3.12 Two-Dimensional, Static Loading Case Studies

3.13 Three-Dimensional, Static Loading Case Study

3.14 Dynamic Loading Case Study

3.15 Vibration Loading

Natural Frequency

Dynamic Forces

3.16 Impact Loading

Energy Method

3.17 Beam Loading

Shear and Moment

Singularity Functions


3.18 Summary

3.19 References

3.20 Web References

3.21 Bibliography

3.22 Problems

Chapter 4 Stress, Strain, and Deflection

4.0 Introduction

4.1 Stress

4.2 Strain

4.3 Principal Stresses

4.4 Plane Stress and Plane Strain

Plane Stress

Plane Strain

4.5 Mohr’s Circles

4.6 Applied Versus Principal Stresses

4.7 Axial Tension

4.8 Direct Shear Stress, Bearing Stress, and Tearout

Direct Shear

Direct Bearing

Tearout Failure

4.9 Beams and Bending Stresses

Beams in Pure Bending

Shear Due to Transverse Loading

4.10 Deflection in Beams

Deflection by Singularity Functions

Statically Indeterminate Beams

4.11 Castigliano’s Method

Deflection by Castigliano’s Method

Finding Redundant Reactions with Castigliano’s Method

4.12 Torsion

4.13 Combined Stresses

4.14 Spring Rates

4.15 Stress Concentration Stress Concentration Under Static Loading

Stress Concentration Under Dynamic Loading

Determining Geometric Stress-Concentration Factors

Designing to Avoid Stress Concentrations

4.16 Axial Compression - Columns

Slenderness Ratio

Short Columns

Long Columns

End Conditions

Intermediate Columns

4.17 S tresses in Cylinders

Thick-Walled Cylinders

Thin-Walled Cylinders

4.18 Case Studies in Static Stress and Deflection Analysis

4.19 Summary

4.20 References

4.21 Bibliography

4.22 Problems

Chapter 5 Static Failure Theories

5.0 Introduction

5.1 Failure of Ductile Materials Under Static Loading

The von Mises-Hencky or Distortion-Energy Theory

The Maximum Shear-Stress Theory

The Maximum Normal-Stress Theory

Comparison of Experimental Data with Failure Theories

5.2 Failure of Brittle Materials Under Static Loading

Even and Uneven Materials

The Coulomb-Mohr Theory

The Modified-Mohr Theory

5.3 Fracture Mechanics

Fracture-Mechanics Theory

Fracture Toughness Kc

5.4 Using The Static Loading Failure Theories

5.5 Case Studies in Static Failure Analysis

5.6 Summary

5.7 References

5.8 Bibliography

5.9 Problems

Chapter 6 Fatigue Failure Theories

6.0 Introduction

History of Fatigue Failure

6.1 Mechanism of Fatigue Failure

Crack Initiation Stage

Crack Propagation Stage


6.2 Fatigue-Failure Models

Fatigue Regimes

The Stress-Life Approach 3

The Strain-Life Approach

The LEFM Approach

6.3 Machine-Design Considerations

6.4 Fatigue Loads

Rotating Machinery Loading

Service Equipment Loading

6.5 Measuring Fatigue Failure Criteria

Fully Reversed Stresses

Combined Mean and Alternating Stress

Fracture-Mechanics Criteria

Testing Actual Assemblies

6.6 Estimating Fatigue Failure Criteria

Estimating the Theoretical Fatigue Strength Sf ’ or Endurance Limit Se’

Correction Factors–Theoretical Fatigue Strength or Endurance Limit

Corrected Fatigue Strength Sf or Corrected Endurance Limit Se

Creating Estimated S-N Diagrams

6.7 Notches and Stress Concentrations

Notch Sensitivity

6.8 Residual Stresses

6.9 Designing for High-Cycle Fatigue

6.10 Designing for Fully Reversed Uniaxial Stresses

Design Steps for Fully Reversed Stresses with Uniaxial Loading

6.11 Designing for Fluctuating Uniaxial Stresses

Creating the Modified-Goodman Diagram

Applying Stress-Concentration Effects with Fluctuating Stresses

Determining the Safety Factor with Fluctuating Stresses

Design Steps for Fluctuating Stresses

6.12 Designing for Multiaxial Stresses in Fatigue

Frequency and Phase Relationships

Fully Reversed Simple Multiaxial Stresses

Fluctuating Simple Multiaxial Stresses

Complex Multiaxial Stresses

6.13 A General Approach to High-Cycle Fatigue Design

6.14 A Case Study in Fatigue Design

6.15 Summary

6.16 References

6.17 Bibliography

6.18 Problems

Chapter 7 Surface Failure

7.0 Introduction

7.1 Surface Geometry

7.2 Mating Surfaces

7.3 Friction

Effect of Roughness on Friction

Effect of Velocity on Friction

Rolling Friction

Effect of Lubricant on Friction

7.4 Adhesive Wear

The Adhesive-Wear Coefficient

7.5 Abrasive Wear

Abrasive Materials

Abrasion-Resistant Materials

7.6 Corrosion Wear

Corrosion Fatigue

Fretting Corrosion

7.7 Surface Fatigue

7.8 Spherical Contact

Contact Pressure and Contact Patch in Spherical Contact

Static Stress Distributions in Spherical Contact

7.9 Cylindrical Contact

Contact Pressure and Contact Patch in Parallel Cylindrical Contact

Static Stress Distributions in Parallel Cylindrical Contact

7.10 General Contact

Contact Pressure and Contact Patch in General Contact

Stress Distributions in General Contact

7.11 Dynamic Contact Stresses

Effect of a Sliding Component on Contact Stresses

7.12 Surface Fatigue Failure Models–Dynamic Contact

7.13 Surface Fatigue Strength

7.14 Summary

7.15 References

7.16 Problems

Chapter 8 Finite element Analysis

8.0 Introduction

Stress and Strain Computation

8.1 Finite Element Method

8.2 Element Types

Element Dimension and Degree of Freedom (DOF)

Element Order

H-Elements Versus P-Elements

Element Aspect Ratio

8.3 Meshing

Mesh Density

Mesh Refinement


8.4 Boundary Conditions

8.5 Applying Loads

8.6 Testing the Model (Verification)

8.7 Modal Analysis

8.8 Case Studies

8.9 Summary

8.10 References

8.11 Bibliography

8.12 Web Resources

8.13 Problems

Part II Machine Design

Chapter 9 Design Case Studies

9.0 Introduction

9.1 Case Study 8–A Portable Air Compressor

9.2 Case Study 9–A Hay-Bale Lifter

9.3 Case Study 10–A Cam-Testing Machine

9.4 Summary

9.5 References

9.6 Design Projects

Chapter 10 Shafts, Keys, and Couplings

10.0 Introduction

10.1 Shaft Loads

10.2 Attachments and Stress Concentrations

10.3 Shaft Materials

10.4 Shaft Power

10.5 Shaft Loads

10.6 Shaft Stresses

10.7 Shaft Failure in Combined Loading

10.8 Shaft Design

General Considerations

Design for Fully Reversed Bending and Steady Torsion

Design for Fluctuating Bending and Fluctuating Torsion

10.9 Shaft Deflection

Shafts as Beams

Shafts as Torsion Bars

10.10 Keys and Keyways

Parallel Keys

Tapered Keys

Woodruff Keys

Stresses in Keys

Key Materials

Key Design

Stress Concentrations in Keyways

10.11 Splines

10.12 Interference Fits

Stresses in Interference Fits

Stress Concentration in Interference Fits

Fretting Corrosion

10.13 Flywheel Design

Energy Variation in a Rotating System

Determining the Flywheel Inertia

Stresses in Flywheels

Failure Criteria

10.14 Critical Speeds of Shafts

Lateral Vibration of Shafts and Beams–Rayleigh’s Method

Shaft Whirl

Torsional Vibration

Two Disks on a Common Shaft

Multiple Disks on a Common Shaft

Controlling Torsional Vibrations

10.15 Couplings

Rigid Couplings

Compliant Couplings

10.16 Case Study 8B

10.17 Summary

10.18 References

10.19 Problems

Chapter 11 Bearings and Lubrication

11.0 Introduction

A Caveat

11.1 Lubricants

11.2 Viscosity

11.3 Types of Lubrication

Full-Film Lubrication

Boundary Lubrication

11.4 Material Combinations in Sliding Bearings

11.5 Hydrodynamic Lubrication Theory

Petroff’s Equation for No-Load Torque

Reynolds’ Equation for Eccentric Journal Bearings

Torque and Power Losses in Journal Bearings

11.6 Design of Hydrodynamic Bearings

Design Load Factor–The Ocvirk Number

Design Procedures

11.7 Nonconforming Contacts

11.8 Rolling-element bearings

Comparison of Rolling and Sliding Bearings

Types of Rolling-Element Bearings

11.9 Failure of Rolling-element bearings

11.10 S election of Rolling-element bearings

Basic Dynamic Load Rating C

Modified Bearing Life Rating

Basic Static Load Rating C0

Combined Radial and Thrust Loads

Calculation Procedures

11.11 Bearing Mounting Details

11.12 Special Bearings

11.13 Case Study 10B

11.14 Summary

11.15 References

11.16 Problems

Chapter 12 Spur Gears

12.0 Introduction

12.1 Gear Tooth Theory

The Fundamental Law of Gearing

The Involute Tooth Form

Pressure Angle

Gear Mesh Geometry

Rack and Pinion

Changing Center Distance


Relative Tooth Motion

12.2 Gear Tooth Nomenclature

12.3 Interference and Undercutting

Unequal-Addendum Tooth Forms

12.4 Contact Ratio

12.5 Gear Trains

Simple Gear Trains

Compound Gear Trains

Reverted Compound Trains

Epicyclic or Planetary Gear Trains

12.6 Gear Manufacturing

Forming Gear Teeth


Roughing Processes

Finishing Processes

Gear Quality

12.7 Loading on Spur Gears

12.8 Stresses in Spur Gears

Bending Stresses

Surface Stresses

12.9 Gear Materials

Material Strengths

AGMA Bending-Fatigue Strengths for Gear Materials

AGMA Surface-Fatigue Strengths for Gear Materials

12.10 Lubrication of Gearing

12.11 Design of Spur Gears

12.12 Case Study 8C

12.13 Summary

12.14 References

12.15 Problems

Chapter 13 Helical, Bevel, and Worm Gears

13.0 Introduction

13.1 Helical Gears

Helical Gear Geometry

Helical-Gear Forces

Virtual Number of Teeth

Contact Ratios

Stresses in Helical Gears

13.2 Bevel Gears

Bevel-Gear Geometry and Nomenclature

Bevel-Gear Mounting

Forces on Bevel Gears

Stresses in Bevel Gears

13.3 Wormsets

Materials for Wormsets

Lubrication in Wormsets

Forces in Wormsets

Wormset Geometry

Rating Methods

A Design Procedure for Wormsets

13.4 Case Study

13.5 Summary

13.6 References

13.7 Problems

Chapter 14 Spring Design

14.0 Introduction

14.1 Spring Rate

14.2 Spring Configurations

14.3 Spring Materials

Spring Wire

Flat Spring Stock

14.4 Helical Compression Springs

Spring Lengths

End Details

Active Coils

Spring Index

Spring Deflection

Spring Rate

Stresses in Helical Compression Spring Coils

Helical Coil Springs of Nonround Wire

Residual Stresses

Buckling of Compression Springs

Compression-Spring Surge

Allowable Strengths for Compression Springs

The Torsional-Shear S-N Diagram for Spring Wire

The Modified-Goodman Diagram for Spring Wire

14.5 Designing Helical Compression Springs for Static Loading

14.6 Designing Helical Compression Springs for Fatigue Loading

14.7 Helical Extension Springs

Active Coils in Extension Springs

Spring Rate of Extension Springs

Spring Index of Extension Springs

Coil Preload in Extension Springs

Deflection of Extension Springs

Coil Stresses in Extension Springs

End Stresses in Extension Springs

Surging in Extension Springs

Material Strengths for Extension Springs

Design of Helical Extension Springs

14.8 Helical Torsion Springs

Terminology for Torsion Springs

Number of Coils in Torsion Springs

Deflection of Torsion Springs

Spring Rate of Torsion Springs

Coil Closure

Coil Stresses in Torsion Springs

Material Parameters for Torsion Springs

Safety Factors for Torsion Springs

Designing Helical Torsion Springs

14.9 Belleville Spring Washers

Load-Deflection Function for Belleville Washers

Stresses in Belleville Washers

Static Loading of Belleville Washers

Dynamic Loading

Stacking Springs

Designing Belleville Springs

14.10 Case Study 10C

14.11 Summary

14.12 References

14.13 Problems

Chapter 15 Screws and Fasteners

15.0 Introduction

15.1 Standard Thread Forms

Tensile Stress Area

Standard Thread Dimensions

15.2 Power Screws

Square, Acme, and Buttress Threads

Power Screw Application

Power Screw Force and Torque Analysis

Friction Coefficients

Self-Locking and Back-Driving of Power Screws

Screw Efficiency

Ball Screws

15.3 Stresses in Threads

Axial Stress

Shear Stress

Torsional Stress

15.4 Types of Screw Fasteners

Classification by Intended Use

Classification by Thread Type

Classification by Head Style

Nuts and Washers

15.5 Manufacturing Fasteners

15.6 Strengths of Standard Bolts and Machine Screws

15.7 Preloaded Fasteners in Tension

Preloaded Bolts Under Static Loading

Preloaded Bolts Under Dynamic Loading

15.8 Determining the Joint Stiffness Factor

Joints With Two Plates of the Same Material

Joints With Two Plates of Different Materials

Gasketed Joints

15.9 C ontrolling Preload

The Turn-of-the-Nut Method

Torque-Limited Fasteners

Load-Indicating Washers

Torsional Stress Due to Torquing of Bolts

15.10 Fasteners in Shear

Dowel Pins

Centroids of Fastener Groups

Determining Shear Loads on Fasteners

15.11 Case Study 8D

15.12 Summary

15.13 References

15.14 Bibliography

15.15 Problems

16.0 Introduction

Chapter 16 Weldments

16.1 Welding Processes

Types of Welding in Common Use

Why Should a Designer Be Concerned with the Welding Process?

16.2 Weld Joints and Weld Types

Joint Preparation

Weld Specification

16.3 Principles of Weldment Design

16.4 Static Loading of Welds

16.5 Static Strength of Welds

Residual Stresses in Welds

Direction of Loading

Allowable Shear Stress for Statically Loaded Fillet and PJP Welds

16.6 Dynamic Loading of Welds

Effect of Mean Stress on Weldment Fatigue Strength

Are Correction Factors Needed For Weldment Fatigue Strength?

Effect of Weldment Configuration on Fatigue Strength

Is There an Endurance Limit for Weldments?

Fatigue Failure in Compression Loading?

16.7 Treating a Weld as a Line

16.8 Eccentrically Loaded Weld Patterns

16.9 Design Considerations for Weldments in Machines

16.10 Summary

16.11 References

16.12 Problems

17.0 Introduction

Chapter 17 Clutches and Brakes

17.1 Types of Brakes and Clutches

17.2 Clutch/Brake Selection and Specification

17.3 Clutch and Brake Material

17.4 Disk Clutches

Uniform Pressure

Uniform Wear

17.5 Disk Brakes

17.6 Drum Brakes

Short-Shoe External Drum Brakes

Long-Shoe External Drum Brakes

Long-Shoe Internal Drum Brakes

17.7 Summary

17.8 References

17.9 Bibliography

17.10 Problems


A Material Properties

B Beam Tables

C Stress-Concentration Factors

D Answers to Selected Problems


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