The revised edition balances discussions of advanced solid mechanics, elasticity theory, classical analysis, and computer-oriented approaches that facilitate solutions when problems resist conventional analysis. It illustrates applications with case studies, worked examples, and problems drawn from modern applications, preparing readers for both advanced study and practice.

Readers will find updated coverage of analysis and design principles, fatigue criteria, fracture mechanics, compound cylinders, rotating disks, 3-D Mohr's circles, energy and variational methods, buckling of various columns, common shell types, inelastic materials behavior, and more. The text addresses the use of new materials in bridges, buildings, automobiles, submarines, ships, aircraft, and spacecraft. It offers significantly expanded coverage of stress concentration factors and contact stress developments. This book aims to help the reader

Ansel C. Ugural, Ph.D., served for two decades as professor and chairman of the mechanical engineering department at Fairleigh Dickinson University. He has also been a visiting and research professor of solid mechanics in mechanical engineering at New Jersey Institute of Technology. He is also a National Science Foundation (NSF) Fellow and is a faculty member at the University of Wisconsin-Madison, where he earned his M.S. in mechanical engineering and Ph.D. in engineering mechanics.

Saul K. Fenster, Ph.D., is professor at New Jersey Institute of Technology, where he served as a president for more than two decades. In addition to experience in industry, he has held varied positions at Fairleigh Dickinson University and taught at the City University of New York. Fenster, a Fellow of the American Society of Mechanical Engineers and the American Society for Engineering Education, is co-author of a text on mechanics.

Preface xvii Acknowledgments xx About the Authors xxi List of Symbols xxii Chapter 1: Analysis of Stress 1 1.1 Introduction 1 1.2 Scope of the Book 3 1.3 Analysis and Design 4 1.4 Conditions of Equilibrium 8 1.5 Definition and Components of Stress 9 1.6 Internal Force Resultant and Stress Relations 13 1.7 Stresses on Inclined Sections 17 1.8 Variation of Stress within a Body 20 1.9 Plane-Stress Transformation 23 1.10 Principal Stresses and Maximum In-Plane Shear Stress 26 1.11 Mohr's Circle for Two-Dimensional Stress 28 1.12 Three-Dimensional Stress Transformation 35 1.13 Principal Stresses in Three Dimensions 38 1.14 Normal and Shear Stresses on an Oblique Plane 42 1.15 Mohr's Circles in Three Dimensions 45 1.16 Boundary Conditions in Terms of Surface Forces 49 1.17 Indicial Notation 50 References 51 Problems 51 Chapter 2: Strain and Material Properties 68 2.1 Introduction 68 2.2 Deformation 69 2.3 Strain Defined 70 2.4 Equations of Compatibility 75 2.5 State of Strain at a Point 76 2.6 Engineering Materials 83 2.6.1 General Properties of Some Common Materials 84 2.7 Stress-Strain Diagrams 86 2.8 Elastic versus Plastic Behavior 91 2.9 Hooke's Law and Poisson's Ratio 92 2.10 Generalized Hooke's Law 96 2.11 Orthotropic Materials 101 2.12 Measurement of Strain: Strain Gage 103 2.13 Strain Energy 107 2.14 Strain Energy in Common Structural Members 111 2.15 Components of Strain Energy 113 2.16 Saint-Venant's Principle 115 References 117 Problems 118 Chapter 3: Problems in Elasticity 133 3.1 Introduction 133 3.2 Fundamental Principles of Analysis 134 Part A: Formulation and Methods of Solution 135 3.3 Plane Strain Problems 135 3.4 Plane Stress Problems 138 3.5 Comparison of Two-Dimensional Isotropic Problems 140 3.6 Airy's Stress Function 141 3.7 Solution of Elasticity Problems 143 3.8 Thermal Stresses 149 3.9 Basic Relations in Polar Coordinates 152 Part B: Stress Concentrations 157 3.10 Stresses Due to Concentrated Loads 157 3.11 Stress Distribution Near a Concentrated Load Acting on a Beam 161 3.12 Stress Concentration Factors 163 Part C: Contact Mechanics 169 3.13 Contact Stresses and Deflections 169 3.14 Spherical and Cylindrical Contacts 171 3.15 Contact Stress Distribution 174 3.16 General Contact 178 References 181 Problems 182 Chapter 4: Failure Criteria 192 4.1 Introduction 192 Part A: Static Loading 193 4.2 Failure by Yielding 193 4.3 Failure by Fracture 195 4.4 Yield and Fracture Criteria 197 4.5 Maximum Shearing Stress Theory 198 4.6 Maximum Distortion Energy Theory 199 4.7 Octahedral Shearing Stress Theory 200 4.8 Comparison of the Yielding Theories 204 4.9 Maximum Principal Stress Theory 205 4.10 Mohr's Theory 206 4.11 Coulomb-Mohr Theory 207 4.12 Introduction to Fracture Mechanics 210 4.13 Fracture Toughness 213 Part B: Repeated and Dynamic Loadings 216 4.14 Fatigue: Progressive Fracture 216 4.15 Failure Criteria for Metal Fatigue 217 4.16 Fatigue Life 223 4.17 Impact Loads 225 4.18 Longitudinal and Bending Impact 227 4.19 Ductile-Brittle Transition 230 References 232 Problems 233 Chapter 5: Bending of Beams 242 5.1 Introduction 242 Part A: Exact Solutions 243 5.2 Pure Bending of Beams of Symmetrical Cross Section 243 5.3 Pure Bending of Beams of Asymmetrical Cross Section 246 5.4 Bending of a Cantilever of Narrow Section 251 5.5 Bending of a Simply Supported Narrow Beam 254 Part B: Approximate Solutions 256 5.6 Elementary Theory of Bending 256 5.7 Normal and Shear Stresses 260 5.8 Effect of Transverse Normal Stress 268 5.9 Composite Beams 270 5.10 Shear Center 276 5.11 Statically Indeterminate Systems 281 5.12 Energy Method for Deflections 284 Part C: Curved Beams 286 5.13 Elasticity Theory 286 5.14 Curved Beam Formula 289 5.15 Comparison of the Results of Various Theories 293 5.16 Combined Tangential and Normal Stresses 296 References 300 Problems 300 Chapter 6: Torsion of Prismatic Bars 315 6.1 Introduction 315 6.2 Elementary Theory of Torsion of Circular Bars 316 6.3 Stresses on Inclined Planes 321 6.4 General Solution of the Torsion Problem 324 6.5 Prandtl's Stress Function 326 6.6 Prandtl's Membrane Analogy 333 6.7 Torsion of Narrow Rectangular Cross Section 338 6.8 Torsion of Multiply Connected Thin-Walled Sections 340 6.9 Fluid Flow Analogy and Stress Concentration 344 6.10 Torsion of Restrained Thin-Walled Members of Open Cross Section 346 6.11 Torsion Bar Springs 350 6.12 Curved Circular Bars 351 Problems 355 Chapter 7: Numerical Methods 364 7…