NO. DE PÁGINAS: 620

CONTENIDO:

The main objective of a basic mechanics course should be to develop in the engineering student thee ability to analyze a given problem in a simple and logical manner and to apply to its solution a few fundamental and well-understood principles. This text is designed for the first course in mechanics of materials-or strength of materials-offered to engineering students in the sophomore or junior year. The authors hope that it will help the instructor achieve this goal in that particular course, in the same way that their earlier texts may have helped to achieve it in statics and dynamics. lt is expected that students using this text will have completed a course in statics. However, Chap. 1 is designed to provide them with an opportunity to review fue concepts learned in that course, while shear and bending-moment diagrams are covered in detail in Secs. 7.2 and 7.3. The properties of moments and centroids of afeas are described in Appendix A; this material mar be used to reinforce fue discussion of the determination of normal and shearing stresses in beams (Chaps. 4 and 5). The concept of stress at a point is introduced in Chap. 1, where it is shown that an axial load may produce shearing stresses as well as normal stresses, depending upon the section considered. The fact that stresses depend upon fue orientation of the surface on which they are computed is emphasized again in Chaps. 3, 4, and 5 in the case of torsion, pille bending, and transverse loading: However, fue discussion of computational techniques-such as Mohr's circle-used for the transformation of stress at a point is delayed until Chap. 6, after students have had fue opportunity to solve problems involving a combination of fue basic loadings and have discovered for themselves fue need for such techniques. For a similar reason, shear and bending-moment diagrams are introduced only in Chap. 7, where they may be applied immediately to fue design of beams and shafts. Statically indeterminate problems are first discussed in Chap. 2 and considered throughout the text for the various loading conditions encounteted.