Contents

Preface

Acknowledgments

About the Authors

List of Symbols

Chapter 1 Analysis of Stress

1.1 Introduction

1.2 Scope of Treatment

1.3 Analysis and Design

1.4 Conditions of Equilibrium

1.5 Definition and Components of Stress

1.6 Internal Force-Resultant and Stress Relations

1.7 Stresses on Inclined Sections

1.8 Variation of Stress within a Body

1.9 Plane-Stress Transformation

1.10 Principal Stresses and Maximum In-Plane Shear Stress

1.11 Mohr’s Circle for Two-Dimensional Stress

1.12 Three-Dimensional Stress Transformation

1.13 Principal Stresses in Three Dimensions

1.14 Normal and Shear Stresses on an Oblique Plane

1.15 Mohr’s Circles in Three Dimensions

1.16 Boundary Conditions in Terms of Surface Forces

1.17 Indicial Notation

References

Problems

Chapter 2 Strain and Material Properties

2.1 Introduction

2.2 Deformation

2.3 Strain Defined

2.4 Equations of Compatibility

2.5 State of Strain at a Point

2.6 Engineering Materials

2.7 Stress–Strain Diagrams

2.8 Elastic versus Plastic Behavior

2.9 Hooke’s Law and Poisson’s Ratio

2.10 Generalized Hooke’s Law

2.11 Hooke’s Law for Orthotropic Materials

2.12 Measurement of Strain: Strain Rosette

2.13 Strain Energy

2.14 Strain Energy in Common Structural Members

2.15 Components of Strain Energy

2.16 Saint-Venant’s Principle

References

Problems

Chapter 3 Problems in Elasticity

3.1 Introduction

3.2 Fundamental Principles of Analysis

Part A—Formulation and Methods of Solution

3.3 Plane Strain Problems

3.4 Plane Stress Problems

3.5 Comparison of Two-Dimensional Isotropic Problems

3.6 Airy’s Stress Function

3.7 Solution of Elasticity Problems

3.8 Thermal Stresses

3.9 Basic Relations in Polar Coordinates

Part B—Stress Concentrations

3.10 Stresses Due to Concentrated Loads

3.11 Stress Distribution Near Concentrated Load Acting on a Beam

3.12 Stress Concentration Factors

3.13 Contact Stresses

3.14 Spherical and Cylindrical Contacts

3.15 Contact Stress Distribution

3.16 General Contact

References

Problems

Chapter 4 Failure Criteria

4.1 Introduction

4.2 Failure

4.3 Failure by Yielding

4.4 Failure by Fracture

4.5 Yield and Fracture Criteria

4.6 Maximum Shearing Stress Theory

4.7 Maximum Distortion Energy Theory

4.8 Octahedral Shearing Stress Theory

4.9 Comparison of the Yielding Theories

4.10 Maximum Principal Stress Theory

4.11 Mohr’s Theory

4.12 Coulomb–Mohr Theory

4.13 Fracture Mechanics

4.14 Fracture Toughness

4.15 Failure Criteria for Metal Fatigue

4.16 Impact or Dynamic Loads

4.17 Dynamic and Thermal Effects

References

Problems

Chapter 5 Bending of Beams

5.1 Introduction

Part A—Exact Solutions

5.2 Pure Bending of Beams of Symmetrical Cross Section

5.3 Pure Bending of Beams of Asymmetrical Cross Section

5.4 Bending of a Cantilever of Narrow Section

5.5 Bending of a Simply Supported Narrow Beam

Part B—Approximate Solutions

5.6 Elementary Theory of Bending

5.7 Normal and Shear Stresses

5.8 Effect of Transverse Normal Stress

5.9 Composite Beams

5.10 Shear Center

5.11 Statically Indeterminate Systems

5.12 Energy Method for Deflections

Part C—Curved Beams

5.13 Elasticity Theory

5.14 Curved Beam Formula

5.15 Comparison of the Results of Various Theories

5.16 Combined Tangential and Normal Stresses

References

Problems

Chapter 6 Torsion of Prismatic Bars

6.1 Introduction

6.2 Elementary Theory of Torsion of Circular Bars

6.3 Stresses on Inclined Planes

6.4 General Solution of the Torsion Problem

6.5 Prandtl’s Stress Function

6.6 Prandtl’s Membrane Analogy

6.7 Torsion of Narrow Rectangular Cross Section

6.8 Torsion of Multiply Connected Thin-Walled Sections

6.9 Fluid Flow Analogy and Stress Concentration

6.10 Torsion of Restrained Thin-Walled Members of Open Cross Section

6.11 Curved Circular Bars: Helical Springs

References

Problems

Chapter 7 Numerical Methods

7.1 Introduction

Part A—Finite Difference Method

7.2 Finite Differences

7.3 Finite Difference Equations

7.4 Curved Boundaries

7.5 Boundary Conditions

Part B—Finite Element Method

7.6 Fundamentals

7.7 The Bar Element

7.8 Arbitrarily Oriented Bar Element

7.9 Axial Force Equation

7.10 Force-Displacement Relations for a Truss

7.11 Beam Element

7.12 Properties of Two-Dimensional Elements

7.13 General Formulation of the Finite Element Method

7.14 Triangular Finite Element

7.15 Case Studies in Plane Stress

7.16 Computational Tools

References

Problems

Chapter 8 Axisymmetrically Loaded Members

8.1 Introduction

8.2 Thick-Walled Cylinders

8.3 Maximum Tangential Stress

8.4 Application of Failure Theories

8.5 Compound Cylinders: Press or Shrink Fits

8.6 Rotating Disks of Constant Thickness

8.7 Design of Disk Flywheels

8.8 Rotating Disks of Variable Thickness

8.9 Rotating Disks of Uniform Stress

8.10 Thermal Stresses in Thin Disks

8.11 Thermal Stresses in Long Circular Cylinders

8.12 Finite Element Solution

8.13 Axisymmetric Element

References

Problems

Chapter 9 Beams on Elastic Foundations

9.1 Introduction

9.2 General Theory

9.3 Infinite Beams

9.4 Semi-Infinite Beams

9.5 Finite Beams

9.6 Classification of Beams

9.7 Beams Supported by Equally Spaced Elastic Elements

9.8 Simplified Solutions for Relatively Stiff Beams

9.9 Solution by Finite Differences

9.10 Applications

References

Problems

Chapter 10 Applications of Energy Methods

10.1 Introduction

10.2 Work Done in Deformation

10.3 Reciprocity Theorem

10.4 Castigliano’s Theorem

10.5 Unit- or Dummy-Load Method

10.6 Crotti–Engesser Theorem

10.7 Statically Indeterminate Systems

10.8 Principle of Virtual Work

10.9 Principle of Minimum Potential Energy

10.10 Deflections by Trigonometric Series

10.11 Rayleigh–Ritz Method

References

Problems

Chapter 11 Stability of Columns

11.1 Introduction

11.2 Critical Load

11.3 Buckling of Pinned-End Columns

11.4 Deflection Response of Columns

11.5 Columns with Different End Conditions

11.6 Critical Stress: Classification of Columns

11.7 Allowable Stress

11.8 Imperfections in Columns

11.9 Eccentrically Loaded Columns: Secant Formula

11.10 Energy Methods Applied to Buckling

11.11 Solution by Finite Differences

11.12 Finite Difference Solution for Unevenly Spaced Nodes

References

Problems

Chapter 12 Plastic Behavior of Materials

12.1 Introduction

12.2 Plastic Deformation

12.3 Idealized Stress–Strain Diagrams

12.4 Instability in Simple Tension

12.5 Plastic Axial Deformation and Residual Stress

12.6 Plastic Defection of Beams

12.7 Analysis of Perfectly Plastic Beams

12.8 Collapse Load of Structures: Limit Design

12.9 Elastic–Plastic Torsion of Circular Shafts

12.10 Plastic Torsion: Membrane Analogy

12.11 Elastic–Plastic Stresses in Rotating Disks

12.12 Plastic Stress–Strain Relations

12.13 Plastic Stress–Strain Increment Relations

12.14 Stresses in Perfectly Plastic Thick-Walled Cylinders

References

Problems

Chapter 13 Plates and Shells

13.1 Introduction

Part A—Bending of Thin Plates

13.2 Basic Assumptions

13.3 Strain–Curvature Relations

13.4 Stress, Curvature, and Moment Relations

13.5 Governing Equations of Plate Deflection

13.6 Boundary Conditions

13.7 Simply Supported Rectangular Plates

13.8 Axisymmetrically Loaded Circular Plates

13.9 Deflections of Rectangular Plates by the Strain-Energy Method

13.10 Finite Element Solution

Part B—Membrane Stresses in Thin Shells

13.11 Theories and Behavior of Shells

13.12 Simple Membrane Action

13.13 Symmetrically Loaded Shells of Revolution

13.14 Some Common Cases of Shells of Revolution

13.15 Thermal Stresses in Compound Cylinders

13.16 Cylindrical Shells of General Shape

References

Problems

Appendix A Problem Formulation and Solution

Appendix B Solution of the Stress Cubic Equation

B.1 Principal Stresses

B.2 Direction Cosines

Appendix C Moments of Composite Areas

C.1 Centroid

C.2 Moments of Inertia

C.3 Parallel-Axis Theorem

C.4 Principal Moments of Inertia

Appendix D Tables and Charts

D.1 Average Properties of Common Engineering Materials

D.2 Conversion Factors: SI Units to U.S. Customary Units

D.3 SI Unit Prefixes

D.4 Deflections and Slopes of Beams

D.5 Reactions Deflections of Statically Indeterminate Beams

D.6 Stress Concentration Factors for Bars and Shafts with Fillets, Grooves, and Holes

Answers to Selected Problems

Index

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