Fundamentals of Machine Elements

Fundamentals of Machine Elements, Third Edition offers an in-depth understanding of both the theory and application of machine elements. Design synthesis is carefully balanced with design analysis, an approach developed through the use of case studies, worked examples, and chapter problems that address all levels of learning taxonomies. Machine design is also linked to manufacturing processes, an element missing in many textbooks. The third edition signifies a major revision from the second edition. The contents have been greatly expanded and organized to benefit students of all levels in design synthesis and analysis approaches. What’s New in This Edition: Balances synthesis and analysis with strong coverage of modern design theory Links coverage of mechanics and materials directly to earlier courses, with expansion to advanced topics in a straightforward manner Aids students of all levels, and includes tie-in to engineering practice through the use of case studies that highlight practical uses of machine elements Contains questions, qualitative problems, quantitative problems, and synthesis, design, and projects to address all levels of learning taxonomies Includes a solutions manual, book website, and classroom presentations in full color, as well as an innovative "tear sheet" manual that allows instructors to present example problems in lectures in a time-saving manner Expands contents considerably, Topics: the importance of the heat affected zone in welding; design synthesis of spur, bevel, and worm gears; selection of multiple types of rolling element bearings (including deep groove, angular contact, toroidal, needle, and cylindrical and tapered roller) using a standard unified approach; consideration of advanced welding approaches such as brazing, friction welding and spot welding; expansion of fatigue coverage including the use of the staircase method to obtain endurance limit; and design of couplings, snap rings, wave and gas springs, and hydrostatic bearings Provides case studies that demonstrate the real-world application of machine elements. For example, the use of rolling element bearings in windmills, powder metal gears, welds in blisks, and roller coaster brake designs are all new case studies in this edition that represent modern applications of these machine elements. Fundamentals of Machine Elements, Third Edition can be used as a reference by practicing engineers or as a textbook for a third- or fourth-year engineering course/module. It is intended for students who have studied basic engineering sciences, including physics, engineering mechanics, and materials and manufacturing processes.

Part I — Fundamentals Introduction What is Design? Design of Mechanical Systems Design as a Multidisciplinary Endeavor Design of Machine Elements Computers in Design Catalogs and Vendors Units Unit Checks Significant Figures Summary Load, Stress, and Strain Introduction Critical Section Load Classification and Sign Convention Support Reactions Static Equilibrium Free-Body Diagram Supported Beams Shear and Moment Diagrams Stress Stress Element Stress Tensor Plane Stress Mohr’s Circle Three-Dimensional Stresses Octahedral Stresses Strain Strain Tensor Plane Strain Summary Introduction to Materials and Manufacturing Introduction Ductile and Brittle Materials Classification of Solid Materials Stress-Strain Diagrams Properties of Solid Materials Stress-Strain Relationships Two-Parameter Materials Charts Effects of Manufacturing Summary Stresses and Strains Introduction Properties of Beam Cross Sections Normal Stress and Strain Torsion Bending Stress and Strain Transverse Shear Stress and Strain Summary Deformation Introduction Moment-Curvature Relation Singularity Functions Method of Superposition Strain Energy Castigliano’s Theorem Summary Failure Prediction for Static Loading Introduction Stress Concentration Fracture Mechanics Modes of Crack Growth Fracture Toughness Failure Prediction for Uniaxial Stress State Failure Prediction for Multiaxial Stress State Summary Fatigue and Impact Introduction Fatigue Cyclic Stresses Strain Life Theory of Fatigue Fatigue Strength Fatigue Regimes Stress Concentration Effects The Modified Endurance Limit Cumulative Damage Influence of Nonzero Mean Stress Influence of Multi-Axial Stress States Fracture Mechanics Approach to Fatigue Linear Impact Stresses and Deformations Summary Lubrication, Friction, and Wear Introduction Surface Parameters Conformal and Nonconformal Surfaces Hertzian Contact Bearing Materials Lubricant Rheology Regimes of Lubrication Friction Wear Summary Part II — Machine Elements Columns Introduction Equilibrium Regimes Concentrically Loaded Columns End Conditions Euler’s Buckling Criterion Johnson’s Buckling Criterion AISC Criteria Eccentrically Loaded Columns Summary Stresses and Deformations in Cylinders Introduction Tolerances and Fits Pressurization Effects Rotational Effects Press Fits Shrink Fits Summary Shafting and Associated Parts Introduction Design of Shafts for Static Loading Fatigue Design of Shafts Additional Shaft Design Considerations Critical Speed of Rotating Shafts Keys, Roll Pins, Splines and Set Screws Retaining Rings and Pins Flywheels Couplings Summary Hydrodynamic and Hydrostatic Bearings Introduction The Reynolds Equation Thrust Slider Bearings Journal Slider Bearings Squeeze Film Bearings Hydrostatic Bearings Summary Rolling-Element Bearings Introduction Historical Overview Bearing Types and Selection Geometry Kinematics Separators Static Load Distribution Elastohydrodynamic Lubrication Fatigue Life Variable Loading Summary General Gear Theory; Spur Gears Introduction Types of Gears Gear Geometry Gear Ratio Contact Ratio and Gear Velocity Tooth Thickness and Backlash Gear Trains Gear Manufacture and Quality Gear Materials Loads Acting on a Gear Tooth Bending Stresses in Gear Teeth Contact Stresses in Gear Teeth Elastohydrodynamic Film Thickness Gear Design Synthesis Summary Helical, Bevel, and Worm Gears Introduction Helical Gears Bevel Gears Worm Gears Summary Fasteners, Connections, and Power Screws Introduction Thread Terminology, Classification, and Designation Power Screws Threaded Fasteners Riveted Fasteners Welded, Brazed, and Soldered Joints Adhesive Bonding Integrated Snap Fasteners Summary Springs Introduction Spring Materials Helical Compression Springs Helical Extension Springs Helical Torsion Springs Leaf Springs Gas Springs Belleville Springs Wave Springs Summary Brakes and Clutches Introduction Thermal Considerations Thrust Pad Clutches and Brakes Cone Clutches and Brakes Block or Short-Shoe Brakes Long-Shoe, Internal, Expanding Rim Brakes Long-Shoe, External, Contracting Rim Brakes Symmetrically Loaded Pivot-Shoe Brakes Band Brakes Slip Clutches Summary Flexible Machine Elements Introduction Flat Belts Synchronous Belts V-Belts Wire Ropes Rolling Chains Summary Appendices Index

Steven R. Schmid is a Professor at the University of Notre Dame, where he has taught manufacturing and design since 1993. Prior to teaching, Dr. Schmid was employed at Triodyne, Inc, performing machine design failure investigations. Among his awards are the ASME Foundation Swanson Fellowship in 2012, the ASME Newkirj Award, and the SME Parsons Awards, and he is a Fellow of the American Society of Mechanical Engineers. Bernard J. Hamrock joined the staff of The Ohio State University as a professor of mechanical engineering in 1985 and is now professor emeritus. Prior to that he spent 18 years as a research consultant in the Tribology Branch of the NASA Lewis Research Center in Cleveland, Ohio. He received his Ph.D. and Doctor of Engineering degrees from the University of Leeds, England. His awards include the NASA Exceptional Achievement Medal in 1984, the 1998 Jacob Wallenberg Award given by The Royal Swedish Academy of Engineering Sciences, and the 2000 Mayo D. Hersey Award from the American Society of Mechanical Engineers. Bo O. Jacobson received his Ph.D. and D.Sc. degrees from Lund University in Sweden. From 1973 until 1987, he was professor of machine elements at Luleå Technology University in Sweden. In 1987 he joined SKF Engineering & Research Centre in the Netherlands, while retaining a professorship at Chalmers University from 1987 to 1991, and Luleå Technical University from 1992 to 1997. In 1997 he was appointed professor of machine elements at Lund University. Professor Jacobson has written ten compendia used at Swedish universities, six covering different machine elements and four covering the basic course and the advanced course in tribology.