Machine design—a classical mechanical engineering textbook

Machine design—a classical mechanical engineering textbook

COMPUTER-AIDED DESIGN Computer-Aided Design 34 (2002) 1049±1050 www.elsevier.com/locate/cad Book Review Machine designÐa classical mechanical engine...

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COMPUTER-AIDED DESIGN Computer-Aided Design 34 (2002) 1049±1050

www.elsevier.com/locate/cad

Book Review Machine designÐa classical mechanical engineering textbook Machine designÐA CAD Approach; A.D. Dimarogonas (Ed.); Wiley, New York, 2001, 996 pages, ISBN 0-47131528-1 (£ 70.95) This book is a revision of an earlier text, by the same author, entitled `Computer Aided Machine Design'. The book is written very much in the classical Mechanical Engineering Design fashion, and essentially covers the same material as other familiar texts such as `Mechanical Engineering Design' by Joseph E. Shigley and Charles R. Mischke (McGraw-Hill, ISBN 0072387831). With nearly 1000 pages, the book certainly is comprehensive. It begins with an Introductory ChapterÐ`A Historical Introduction of Machines'. This is very detailed, and includes material beginning with primitive crafts, through Biblical times, Greece, Rome, Egyptian, the Middle Ages, Renaissance, through to the Industrial Revolution including the Watt steam engine and the Ford Model A automobile. The remainder of the book begins with Chapter 1Ð`Machine Design Methodology'. This chapter includes traditional information on the design process beginning with problem confrontation, formulation, assumptions, generation and selection of design concepts, synthesis, reduction to an analyzable model, optimization and presentation. There is a good section on the Japanese Quality Function Deployment matrix method. Excellent examples of conceptual design inversion are included. Product liability and design for safety are brie¯y discussed. A list of design projects suitable for academic use completes the chapter. Chapter 2Ð `Kinematic Analysis of Machines' includes the familiar four bar linkage, velocity and acceleration analysis, homogeneous transformation matrices, robots, cam design, and gear tooth involute curves. The analysis is performed using classical trigonometry methods. It was disappointing to not see the Newton±Raphson style solution that is implemented in software such as ADAMS (Mechanical Dynamics, Inc., Ann Arbor, MI, USA). Chapter 3Ð`Analysis of Machine Loads' covers forces, loads, free body diagrams, virtual work, the D'Alembert principle, and a brief introduction to elastic deformation. Chapter 4Ð`Machine Design Materials and Manufacture' covers elasticity and Young's PII: S 0010-448 5(01)00221-4

Modulus, material processing methods, preferred ®ts and tolerances, material selection, and factor of safety. Chapter 5Ð`Sizing Machine Components for Strength' includes tensile, compressive, and shear loading, bending of beams, Mohr's Circle, pressure vessels, and a section on the inertial load caused by rotation. Stress concentration, fatigue, and brittle fracture are also covered. Chapter 6Ð`Computer Methods for Machine Modeling', brie¯y presents the geometric and solid modeling material that one would normally ®nd in books such as `Principles of CAD/CAM/CAE Systems' by Kunwoo Lee (Addison-Wesley. ISBN 0201380366). The treatment is very brief, with an extremely short reference list. Chapter 7Ð`Machine Design Synthesis' includes a very useful section on machine design optimization, including use of Lagrange multipliers as constraints. A solved spreadsheet example is included. Remaining chapters deal with Fastening and Joining, Design for Rigidity, Clutches and Brakes, Lubrication and Bearings, Gear and Shaft Design. Appendices list Stress Concentration factors, Standard Fastener Sizes, Properties of Engineering Materials, and Properties of Structural Sections. The book most certainly covers the usual Mechanical Engineering Design curriculum in detail, and is a good value compared to similar texts on the subject. It is very much a classical textÐmuch like an encyclopedia or handbook. The most noticeable missing element is Geometric Dimensioning and TolerancingÐa subject that is becoming very important. There is some reference to CAD approaches, such as using spreadsheets, in Chapters 6,7 and Chapter 13Ð `Design of Fixed Speed Drives'. The Preface mentions availability of spreadsheet solutions and executable code. However, no software actually accompanied the book, and the publisher states that ª¼there is no CD-ROM nor website associated with this bookº. This is regrettable, but perhaps an unfortunate consequence of the author having passed away during production of the book. All in all, this book is an important contribution to Mechanical Engineering Design, and comes at a time when, with the pressure to produce new research publications, many professors are unwilling to risk undertaking design projects or write texts on the subject. It is hoped that someone will endeavor to create a CD-ROM or website to accompany this useful text in the very near future. Inclusion of worked

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A.D. Spence / Computer-Aided Design 34 (2002) 1049±1050

examples that merge spreadsheet design optimization calculations with Computer Aided Geometric Design software (such as Excel and the recently introduced Autodesk Inventor), would create an excellent and modern suite of tools for teaching Mechanical Engineering Design.

Allan D. Spence* Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ont., Canada L8S 4L7 E-mail address: [email protected]

* Tel.: 11-905-525-9140; fax: 11-905-572-7944.