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This fifth edition of Schaum’s Strength of Materials book has been substantially modified by the second author to better fit the outline of the introductory Strength of Materials (Solid Mechanics) course, and to better fit the presentation of material in most introductory textbooks on the subject. In addition, the following changes have been made: 

1. Problem solutions and Supplementary Problems are presented using the metric SI units only. 
2. The computer programs have been omitted. The use of MATLAB or other programs are available to students if more complicated problems are of interest. 
3. The more advanced materials and problems that are not found in an introductory course have been omitted for simplicity of presentation. This book is intended to be used in an introductory course only. 

4. A short chapter on Fatigue, a subject included on the Fundamentals of Engineering Examination, has been added. It is a modified chapter, based on a section on Fatigue written by my friend and previous colleague, Charlie Muvdi, from “Engineering Mechanics of Materials,” by B. B. Muvdi and J. W. McNabb. 

5. A section on Combined Loading has been added. 
6. The chapter on Centroids and Moments of Inertia has been omitted; it is assumed to have been part of a Statics course that precedes Solid Mechanics. 
Strength of Materials, also called The Mechanics of Materials or Solid Mechanics, provides the basis for the design of the components that make up machines and load-bearing structures. In Statics, the forces and moments acting at various points in a structural component or at points of contact with other structures were determined. The forces, stresses, and strains existing within a component were not of interest. In Solid Mechanics, we will consider questions like, “What load will cause this structure to fail?”, “What maximum torque can this shaft transmit?”, “What material should be selected for this component?”, “At what load will this column buckle?” Such questions were not of interest in a Statics course.

But, before any of these questions can be answered, we must calculate the forces and moments acting on the components that make up a structure or machine. So, Statics always precedes the study of Strength of Materials. Sometimes Statics is combined with Strength of Materials in one course since they are so closely related. I would like to thank the estate of the late William Nash for allowing me to create this fifth edition of a book that obviously required much diligent work by Professor Nash. Many thanks are also given to Dr. Charlie Muvdi who provided good advice on the content of this revision. It was a pleasure working with Kimberly Eaton of McGraw-Hill in making the many decisions required in such a venture.

In this book we shall be concerned with what might be called the internal effects of forces acting on a body. The bodies themselves will no longer be considered to be perfectly rigid as was assumed in statics; instead, the calculation of the deformations of various bodies under a variety of loads will be one of our primary concerns in the study of strength of materials