Shigley’s Mechanical Engineering Design 11th Edition

Book Preface

This text is intended for students beginning the study of mechanical engineering design. The focus is on blending fundamental development of concepts with practical specification of components. Students of this text should find that it inherently directs them into familiarity with both the basis for decisions and the standards of industrial components. For this reason, as students transition to practicing engineers, they will find that this text is indispensable as a reference text. The objectives of the text are to:

Cover the basics of machine design, including the design process, engineering mechanics and materials, failure prevention under static and variable loading, and characteristics of the principal types of mechanical elements. Offer a practical approach to the subject through a wide range of real-world applications and examples.

Encourage readers to link design and analysis.
Encourage readers to link fundamental concepts with practical component specification

New to This Edition

Enhancements and modifications to the eleventh edition are described in the following summaries:

Chapter 6, Fatigue Failure Resulting from Variable Loading, has received a complete update of its presentation. The goals include clearer explanations of underlying mechanics, streamlined approach to the stress-life method, and updates consistent with recent research. The introductory material provides a greater appreciation of the processes involved in crack nucleation and propagation. This allows the strain-life method and the linear-elastic fracture mechanics method to be given proper context within the coverage, as well as to add to the understanding of the factors driving the data used in the stress-life method. The overall methodology of the stress-life approach remains the same, though with expanded explanations and improvements in the presentation.
Chapter 2, Materials, includes expanded coverage of plastic deformation, strainhardening, true stress and true strain, and cyclic stress-strain properties. This information provides a stronger background for the expanded discussion in Chapter 6 of the mechanism of crack nucleation and propagation.
Chapter 12, Lubrication and Journal Bearings, is improved and updated. The chapter contains a new section on dynamically loaded journal bearings, including the mobility method of solution for the journal dynamic orbit. This includes new examples and endof-chapter problems. The design of big-end connecting rod bearings, used in automotive applications, is also introduced.

Approximately 100 new end-of-chapter problems are implemented. These are focused on providing more variety in the fundamental problems for first-time exposure to the topics.
In conjunction with the web-based parameterized problems available through McGrawHill Connect Engineering, the ability to assign new problems each semester is ever stronger.

The following sections received minor but notable improvements in presentation:
Section 3-8 Elastic Strain
Section 3-11 Shear Stresses for Beams in Bending
Section 3-14 Stresses in Pressurized Cylinders

Section 3-15 Stresses in Rotating Rings
Section 4-12 Long Columns with Central Loading
Section 4-13 Intermediate-Length Columns with
Central Loading
Section 4-14 Columns with Eccentric Loading
Section 7-4 Shaft Design for Stress
Section 8-2 The Mechanics of Power Screws
Section 8-7 Tension Joints—The External Load
Section 13-5 Fundamentals
Section 16-4 Band-Type Clutches and Brakes
Section 16-8 Energy Considerations
Section 17-2 Flat- and Round-Belt Drives
Section 17-3 V Belts
In keeping with the well-recognized accuracy and consistency within this text, minor improvements and corrections are made throughout with each new edition. Many of these are in response to the diligent feedback from the community of users.