Richard Budynas,
Rochester Institute of Technology J. Keith Nisbett,
Missouri University of Science and Technology
ISBN: 0071311130 Copyright year: 2011
New to This Edition
Enhancements and modifications to the ninth edition are described in the following
summaries:
New and revised end-of-chapter problems. This edition includes 1017 end-of-chapter
problems, a 43 percent increase from the previous edition. Of these problems,
671 are new or revised, providing a fresh slate of problems that do not have
years of previous circulation. Particular attention has been given to adding
problems that provide more practice with the fundamental concepts. With an eye
toward both the instructor and the students, the problems assist in the process of
acquiring knowledge and practice. Multiple problems with variations are available
for the basic concepts, allowing for extra practice and for a rotation of similar
problems between semesters.
Problems linked across multiple chapters. To assist in demonstrating the linkage of
topics between chapters, a series of multichapter linked problems is introduced.
Table 1–1 on p. 24 provides a guide to these problems. Instructors are encouraged
to select several of these linked problem series each semester to use in homework
assignments that continue to build upon the background knowledge gained in
previous assignments. Some problems directly build upon the results of previous
problems, which can either be provided by the instructor or by the students' results
from working the previous problems. Other problems simply build upon the background
context of previous problems. In all cases, the students are encouraged to
see the connectivity of a whole process. By the time a student has worked through a series of linked problems, a substantial analysis has been achieved, addressing
such things as deflection, stress, static failure, dynamic failure, and multiple
component selection. Since it comes one assignment at a time, it is no more
daunting than regular homework assignments. Many of the linked problems blend
very nicely with the transmission case study developed throughout the book, and
detailed in Chap. 18.
Content changes. The bulk of the content changes in this edition falls into categories
of pedagogy and keeping current. These changes include improved examples, clarified
presentations, improved notations, and updated references.
A few content changes warrant particular mention for the benefit of instructors familiar
with previous editions.
Transverse shear stress is covered in greater depth (Sec. 3–11 and Ex. 3–7).
The sections on strain energy and Castigliano’s method are modified in presentation
of equations and examples, particularly in the deflections of curved members
(Secs. 4–7 through 4–9).
The coverage of shock and impact loading is mathematically simplified by using an
energy approach (Sec. 4–17).
The variable σrev is introduced to denote a completely reversed stress, avoiding
confusion with σa, which is the amplitude of alternating stress about a mean stress
(Sec. 6–8).
The method for determining notch sensitivity for shear loading is modified to be
more consistent with currently available data (Sec. 6–10).
For tension-loaded bolts, the yielding factor of safety is defined and distinguished
from the load factor (Sec. 8–9).
The presentation of fatigue loading of bolted joints now handles general fluctuating
stresses, treating repeated loading as a special case (Sec. 8–11).
The notation for bearing life now distinguishes more clearly and consistently between
life in revolutions versus life in hours (Sec. 11–3).
The material on tapered roller bearings is generalized to emphasize the concepts
and processes, and to be less dependent on specific manufacturer’s terminology
(Sec. 11–9).
Streamlining for clarity to the student. There is a fine line between being comprehensive
and being cumbersome and confusing. It is a continual process to refine
and maintain focus on the needs of the student. This text is first and foremost an
educational tool for the initial presentation of its topics to the developing engineering
student. Accordingly, the presentation has been examined with attentiveness
to how the beginning student would likely understand it. Also recognizing
that this text is a valued reference for practicing engineers, the authors have endeavored
to keep the presentation complete, accurate, properly referenced, and
straightforward.
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2011
McGraw-Hill Education Asia