Statics and Strength of Materials

The objective of this fifth edition is to cover statics and strength of materials at an elementary level, where calculus is not required. However, for instructors who use the text to teach in accredited programs in the technologies, sections requiring calculus are included. Those sections relate to centroids and moments of inertia of plane areas, and deflection of beams by integration. Marked with an asterisk, this material can be omitted without a loss of continuity. Statics and Strength of Materialsis written for students enrolled in the industrial technology or engineering technology curriculum, and in university-level courses for nonengineering majors, such as architecture. It is also useful for self-study and can serve as a reference for courses in materials, materials testing, machine design, and structural design. This edition contains several new features, including a number of Application Sidebars scattered throughout the book. These pages describe real-life applications related to topics discussed in the text and serve to emphasize the fact that statics and strength of materials are not purely academic subjects. We have also included a new section on residential design utilizing tabulated values. Many students are aware of the fact that residential construction practices are influenced primarily by local or federal building codes. However, those same students are often unaware of any limitations within the code tables and cannot always make a connection between such tabulated values and the theoretical values obtained using traditional methods. We hope that the new material will help bridge this gap. Also, due to the increasing use of machine-graded lumber, a table of machine-stress rated (MSR) and machine-evaluated lumber (MEL) designations and properties has been added to the Appendix. Aside from this additional material, the general plan of the book is unchanged. Care has been taken to present the various topics with clarity in a simple and direct fashion and to avoid information overload. To that end, more than 200 examples illustrate the principles involved. Chapters 1 through 9 provide coverage of statics, while strength of materials is covered in Chapters 10 through 18. The chapters on statics begin with a review of basic mathematics. Trigonometric formulas and the component method are employed to solve concurrent force problems. A discussion of the resultant and equilibrium bf nonconcurrent forces follows, with special emphasis on the theorem of moments. Then the force analysis of structures and machines, and concurrent and nonconcurrent force systems in space is presented. The chapters on statics conclude with friction, centers of gravity, centroids, and moment of inertia of areas. The chapters on strength of materials begin with the study of stress and strain in axially loaded members. This is followed by discussions of shear stresses and strains in torsion members, bending and deflection of beams, combined stress using Mohr's circle, columns, and structural connections. The text includes more than 950 problems at various levels of difficulty for the student. Both the U.S. customary system of units and the international system of units (SI) are introduced and applied equally in the problems and examples. The majority of the material in this book was originally written by H. W. Morrow, who prepared two preliminary editions for use at Nassau (NY) Community College from 1976 to 1979. These were followed by three editions, published in 1981, 1993 and 1998, by Prentice Hall. Subsequent editions represent a joint collaboration between Mr. Morrow and R. P Kokemak of Fitchburg (MA) State College. We would like to thank the following individuals for the help they provided with various aspects of the fifth edition: Neil Gow of Morgan Contraction Company; David Tourigny of Marceau's Industrial Belt Services; and Christine Woollett of The Royal Society. Special thanksMorrow, Harold I. is the author of 'Statics and Strength of Materials', published 2003 under ISBN 9780130490353 and ISBN 0130490350.