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PREFACE:

This book is intended as a text for first courses in Mechanical Engineering Design and as a reference for practicing engineers. 

It is assumed that the user has had basic courses in Mechanics, Strength of Materials, and Materials Properties. However, the first nine chapters of the book (Part I) serve to review as well as extend this basic background.

 The remaining chapters (Part II) deal with the application of these fundamentals to specific machine components. Features of the fifth edition of the text include:

 • Modern/current issues and safety considerations—New homework problems outline real world safety issues adapted from actual case studies. Homework questions which help the student research, outline, and write on issues which confront the modern engineer are scattered throughout the text.

 • Composites—A new section is presented to introduce composite materials and their properties to the student. New references provide the student with a foundation of information regarding composite materials.

 • Engineering material selection process—Ashby’s material selection charts are reviewed and discussed and are available as an aid to students in learning more about engineering materials. New topics MIL-HDBK-5JandMIL-HDBK-17 are introduced which aid the student in selection and use of common engineering materials. 

• Web site addresses and problems—Web site addresses are given throughout the text to provide the student with access to additional information on topics including industrial standards, part selection, and properties of materials. Problems appear at the end of the chapter that require the student to utilize the internet in solving various machine component design problems. 

• Three-dimensional stress—A new sample problem gives the student a powerful tool to analyze complex stress states, and new related homework problems give opportunity for the student to polish analysis skills. 

• Wear and wear theory—Additional text on discretization wear theory outlines the use of wear models for machine parts. Associated homework problems introduce the student to the unique test apparatus used to determine wear coefficients. 

• Shaft critical speeds—This section is expanded with additional solution methods and theory discussion including explanation of both Rayleigh’s and Dunkerley’s equations. New and revised homework problems accompany this section to challenge the student regarding these ideas. 

• Appendix—Contributed appendixes have been added for using reference MIL-HDBK-5J, vectorial solution methods, normal distributions, fatigue cycle formulas, and gear terminology.