Strength of Materials (Classic Reprint)

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Excerpt from Strength of MaterialsIt may be said, in a general way, that when designing machinery the designer must take into consideration two main factors. One is to so design the mechanism mechanically that the various motions required can be obtained by means of the machine. The other is to so proportion the parts that they will be strong enough to do the work for which they are intended Without breakage and, in most cases, without distortion. A third factor also enters prominently into the design, that Iof_so designing a machine that the various parts can be easily manufactured, but this last factor, while commercially fully as important as the other two, has not a direct bearing upon the actual working of the completed mechanism.The subject that will be dealt with in this Reference Book relates to the second of the two main questions affecting the design, that of proportioning the parts so that they will be strong enough to properly do the work for which they are intended. This problem, in turn, may be divided into two sections, one of which deals with the determining of the forces which act upon a machine part, tending to. Break or distort it, and the determination of the actual proportions necessary to resist these forces. The science of determining the forces acting upon a machine part or, in general, upon an engineering structure, is termed mechanics, this word being used in its more limited sense, often referred to as theoretical mechanics. The problem of actually determining the dimensions of details of machines or structures with regard to their strength is covered by that part of mechanical knowl edge which is known as the strength of materials. It should be under stood, however, that the question of determining the forces acting upon an engineering structure or machine and the determination of the actual dimensions and materials required to resist these forces, are so closely connected that in dealing with the strength of materials we must also deal, to a very large extent, with the mechanical theory of forces.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.