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Sinopsis
Excerpt from Calculations of Elements of Machine Design
A load is a force applied to a body,' from without. It tends to produce a deformation. And is resisted by the stress Which it creates within the body.
A working load is the maximum load occurring under ordinary working conditions.
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Excerpt from Calculations of Elements of Machine Design
A load is a force applied to a body,' from without. It tends to produce a deformation. And is resisted by the stress Which it creates within the body.
A working load is the maximum load occurring under ordinary working conditions.
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.
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Excerpt from Calculations of Elements of Machine Design
It is the custom among most firms engaged in the designing of machinery to settle upon certain stresses as proper for given materials in given classes of work. These stresses are chosen as the result of many years of experience on their own part, or of observation of the successful experience of others, and so long as the quality of the material remains unchanged, and the service does not vary in character, the method is eminently satisfactory.
Progress, however, brings up new service, for which precedent is lacking, and materials of different qualities, either better or cheaper, for which the safe working stresses have not been determined, and the designer is compelled to determine the stress proper for the work in hand by using a so-called "factor of safety." The name "factor of safety" is misleading for several reasons. In the first place, it is not a factor at all, from a mathematical point of view, but is in its use a divisor, and in its derivation a product. In order to obtain the safe working stress, we divide the ultimate strength of the material by the proper "factor of safety," and in order to obtain this factor of safety we multiply together several factors, which, in turn, depend upon the qualities of the material, and the conditions of service. So our factor of safety is both a product and a divisor, but it is not a factor. Then again, we infer, naturally, that with a factor of twelve, say, we could increase the load upon a machine member to twelve times its ordinary amount before rupture would occur, when, as a matter of fact, this is not so, at least not in a machine with moving parts, sometimes under load, and sometimes not subjected to working stresses. Still more dangerous conditions are met with when the parts are subjected to load first in one direction, and then in the other, or to shocks or sudden loading and unloading. The margin of safety is, therefore, apparent, not real, and we will hereafter call the quantity we are dealing with the "apparent factor of safety," for the name factor is too firmly fixed in our minds to easily throw it off.
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.
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Calculations of Elements of Machine Design Classic Reprint
Librería: PBShop.store US, Wood Dale, IL, Estados Unidos de America
Calificación del vendedor: 5 de 5 estrellas
PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000. Nº de ref. del artículo: LW-9781330358382
Cantidad disponible: 15 disponibles
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Calculations of Elements of Machine Design Classic Reprint
Librería: PBShop.store UK, Fairford, GLOS, Reino Unido
Calificación del vendedor: 5 de 5 estrellas
PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000. Nº de ref. del artículo: LW-9781330358382
Cantidad disponible: 15 disponibles
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Calculations of Elements of Machine Design (Classic Reprint)
Impresión bajo demandaLibrería: Forgotten Books, London, Reino Unido
Calificación del vendedor: 5 de 5 estrellas
Paperback. Condición: New. Print on Demand. This book dives into the multifaceted world of machine design, guiding readers through the process of calculating and determining the proper dimensions and configurations for various machine elements. The author delves into the intricacies of balancing safety, cost, and performance, providing a comprehensive framework for designing reliable and efficient machines. The book is structured around the concept of the 'factor of safety', a crucial element in ensuring that machines can withstand the stresses they encounter during operation. The author explores different factors that contribute to this safety margin, such as the material properties, loading conditions, and potential impact. This in-depth analysis helps readers make informed decisions about the appropriate safety factors for specific applications. In addition to the theoretical underpinnings, the book also emphasizes practical considerations in machine design. The author provides practical formulas and guidelines for calculating stresses, selecting materials, and determining dimensions of various machine components, such as bolts, rivets, and shafts. These practical insights, coupled with the theoretical foundation, equip readers with the knowledge and tools necessary to design machines that are not only safe but also cost-effective and efficient. Overall, this book serves as an indispensable resource for anyone involved in the design of machines, offering a comprehensive understanding of the principles and practices that underpin successful machine design. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Nº de ref. del artículo: 9781330358382_0
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