Excerpt from The Structure and Properties, of the More Common, Materials of Construction
This book is an outgrowth of the laboratory course in Materials of Construction given to Juniors in Sibley College. For some time past the instructors in the course have been giving, during the first hour of each three hour laboratory period, a lecture upon the theoretical side of the particular test being conducted with indications of the relation of the test to engineering practice. Then came the actual testing work in the laboratory as a demonstration of the theory, with further discussion during the conduct of the test. Both the theory and conduct of the test and its relation to engineering practice were then discussed in the reports written by the students. In time it has become evident that we cannot by this method thoroughly cover as much ground as we desire. Hereafter students will study the theory of each topic in this book and discuss theory and practice with the instructor during the first part of the laboratory period. This discussion will replace the lecture formerly given.
The book is restricted almost entirely to the theoretical discussion of the field. It is divided into two parts. The first part deals with the determination of the properties of the materials by means of engineering testing. An analytical attitude, mainly from the standpoint of metallography, has been used throughout. Under each method of loading as tension, torsion, etc., there is a discussion of what goes on inside the material throughout the progress of the loading to break. The ordinary formulas for calculation of stresses and deformations are examined. The assumptions on which they are based are stated. Their range of validity is given and the direction and magnitude of their errors after they cease to be valid. Knowledge of these points is considered essential to the intelligent use of the formulas. The factors changing the results of tests are discussed, bringing out the need of standard specifications. No attempt is made to give collections of data of results of tests, but there is an attempt to teach a student how to interpret and criticize test results.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This 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. Это и многое другое вы найдете в книге The Structure and Properties, of the More Common, Materials of Construction (Classic Reprint) (G. B. Upton)