Shigley’s Mechanical Engineering Design, Eighth Edition By Budynas and Nisbet
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Course
Machine Elements
Institution
Gaziantep University
Book
Shigley\\\'s Mechanical Engineering Design
This book is Shigley’s Mechanical Engineering Design, Eighth Edition By Budynas and Nisbet.
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materials.
I. Basics 8
Introduction 8
1. Introduction to Mechanical Engineering Design 9
2. Materials 33
3. Load and Stress Analysis 72
4. Deflection and Stiffness 145
II. Failure Prevention 208
Introduction 208
5. Failures Resulting from Static Loading 209
6. Fatigue Failure Resulting from Variable Loading 260
III. Design of Mechanical Elements 349
Introduction 349
7. Shafts and Shaft Components 350
8. Screws, Fasteners, and the Design of Nonpermanent Joints 398
9. Welding, Bonding, and the Design of Permanent Joints 460
10. Mechanical Springs 501
11. Rolling−Contact Bearings 550
12. Lubrication and Journal Bearings 597
13. Gears — General 652
14. Spur and Helical Gears 711
15. Bevel and Worm Gears 762
16. Clutches, Brakes, Couplings, and Flywheels 802
17. Flexible Mechanical Elements 856
18. Power Transmission Case Study 909
Objectives
This text is intended for students beginning the study of mechanical engineering
design. The focus is on blending fundamental development of concepts with practi-
cal 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 me-
chanics and materials, failure prevention under static and variable loading, and char-
acteristics of the principal types of mechanical elements.
• Offer a practical approach to the subject through a wide range of real-world applica-
tions and examples.
• Encourage readers to link design and analysis.
• Encourage readers to link fundamental concepts with practical component specification.
New to This Edition
This eighth edition contains the following significant enhancements:
• New chapter on the Finite Element Method. In response to many requests from
reviewers, this edition presents an introductory chapter on the finite element method.
The goal of this chapter is to provide an overview of the terminology, method, capa-
bilities, and applications of this tool in the design environment.
• New transmission case study. The traditional separation of topics into chapters
sometimes leaves students at a loss when it comes time to integrate dependent topics
in a larger design process. A comprehensive case study is incorporated through stand-
alone example problems in multiple chapters, then culminated with a new chapter
that discusses and demonstrates the integration of the parts into a complete design
process. Example problems relevant to the case study are presented on engineering
paper background to quickly identify them as part of the case study.
• Revised and expanded coverage of shaft design. Complementing the new transmis-
sion case study is a significantly revised and expanded chapter focusing on issues rel-
evant to shaft design. The motivating goal is to provide a meaningful presentation that
allows a new designer to progress through the entire shaft design process – from gen-
eral shaft layout to specifying dimensions. The chapter has been moved to immedi-
ately follow the fatigue chapter, providing an opportunity to seamlessly transition
from the fatigue coverage to its application in the design of shafts.
• Availability of information to complete the details of a design. Additional focus is
placed on ensuring the designer can carry the process through to completion.
xv
By assigning larger design problems in class, the authors have identified where the
students lack details. For example, information is now provided for such details as
specifying keys to transmit torque, stress concentration factors for keyways and re-
taining ring grooves, and allowable deflections for gears and bearings. The use of in-
ternet catalogs and engineering component search engines is emphasized to obtain
current component specifications.
• Streamlining of presentation. Coverage of material continues to be streamlined to
focus on presenting straightforward concept development and a clear design proce-
dure for student designers.
Content Changes and Reorganization
A new Part 4: Analysis Tools has been added at the end of the book to include the new
chapter on finite elements and the chapter on statistical considerations. Based on a sur-
vey of instructors, the consensus was to move these chapters to the end of the book
where they are available to those instructors wishing to use them. Moving the statisti-
cal chapter from its former location causes the renumbering of the former chapters 2
through 7. Since the shaft chapter has been moved to immediately follow the fatigue
chapter, the component chapters (Chapters 8 through 17) maintain their same number-
ing. The new organization, along with brief comments on content changes, is given
below:
Part 1: Basics
Part 1 provides a logical and unified introduction to the background material needed for
machine design. The chapters in Part 1 have received a thorough cleanup to streamline
and sharpen the focus, and eliminate clutter.
• Chapter 1, Introduction. Some outdated and unnecessary material has been removed.
A new section on problem specification introduces the transmission case study.
• Chapter 2, Materials. New material is included on selecting materials in a design
process. The Ashby charts are included and referenced as a design tool.
• Chapter 3, Load and Stress Analysis. Several sections have been rewritten to im-
prove clarity. Bending in two planes is specifically addressed, along with an example
problem.
• Chapter 4, Deflection and Stiffness. Several sections have been rewritten to improve
clarity. A new example problem for deflection of a stepped shaft is included. A new
section is included on elastic stability of structural members in compression.
Part 2: Failure Prevention
This section covers failure by static and dynamic loading. These chapters have received
extensive cleanup and clarification, targeting student designers.
• Chapter 5, Failures Resulting from Static Loading. In addition to extensive cleanup
for improved clarity, a summary of important design equations is provided at the end
of the chapter.
• Chapter 6, Fatigue Failure Resulting from Variable Loading. Confusing material on
obtaining and using the S-N diagram is clarified. The multiple methods for obtaining
notch sensitivity are condensed. The section on combination loading is rewritten for
greater clarity. A chapter summary is provided to overview the analysis roadmap and
important design equations used in the process of fatigue analysis.
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