Monday, April 23, 2018

Introduction to the Design and Behavior of Bolted Non-Gasketed Joints Fourth Edition By Joints John H. Bickford

Introduction to the Design and Behavior of Bolted  Non-Gasketed Joints Fourth Edition By  Joints John H. Bickford
Preface
This fourth edition stands on the shoulders of the first three editions, so I have included large excerpts from their prefaces once again. These detail the steps taken and the themes developed to reach this point. The acknowledgments found in the third edition are still valid too, so they are also included. At the end of this preface I express my thanks for the additional help provided for this present text.
The third edition was just under 1,000 pages in length, so it was clearly undesirable to create a longer, single volume, fourth edition. Experience in conducting bolting seminars, and through contacts with readers has shown, furthermore, that the audience for this text comes in two flavors. Many users deal primarily with gasketed, pressure vessel, and piping joints. The rest deal with the types of non gasketed joints found in the auto, aerospace, structural steel, heavy equipment, mass production, and other industries. So it was decided that this fourth edition should be published in two volumes, one for each group. It was further decided that Volume 2, for gasketed joint users, should be coauthored by me and by Jim Payne. Jim is an internationally recognized expert in PVP joints, and is very active in ASME, the Pressure Vessel Research Council, and other groups that sponsor research and write standards dealing with gasketed joints. Jim will write all of the chapters whose focus is the gasketed joint. I will contribute those chapters pertinent to any bolted joint: on the basic behavior of joints and bolts, on materials, on threads, on torque and other preload control means, on failure modes common to gasketed and non-gasketed joints, etc. This generic material will also, of course, be included in the volume designed for those dealing with non-gasketed joints, so there will be a great deal of redundancy between the two volumes. We expect that only a few readers will need or want both volumes. Previous editions have been used by practicing engineers, and have rarely if ever been used as a classroom text. An attempt has been made this time to make it more attractive not only to people in the field but also to teachers. A set of problems or exercises has been included at the end of each chapter. Answers to these will be found in the Appendix. All of the information required to answer the questions or do the exercises can be found in the book, either in the text or in the tables of data found in the Appendices. In fact, many of the exercises have been designed to force the student to search for information or data not in the chapter containing those exercises but elsewhere in the book, to encourage him to learn how to use the book more effectively. These exercises should also help to fix the material in the mind of a home based student. An attempt has also been made to create a leaner, meaner text: long winded historical discussions, redundancies, irrelevancies and the like have been excluded this time so that basic ideas, data, and themes will be easier to find and use. The overall goal is a useful text that can also be used for training purposes. Much material has been eliminated, but a lot of new information has been added. This is scattered throughout both volumes and generally involves an update of material already included in the previous edition. These updates are based on the latest revisions to various bolting standards, on information obtained from colleagues who are active in the field, and from that wonderfully helpful source of information that was not available to me when I created previous editions the Web. The latter is so useful that, in several places including the Appendices, I’ve given the addresses of many Web sites you will find especially useful when working with or studying bolted joints. There are no new chapters in this Volume 1. Changes and additions have sometimes only required a sentence or two, more frequently a new paragraph, and occasionally a couple of pages. New information includes such things as revised designations for several bolting materials; new products and procedures to fight self-loosening; new ways to control preload, including the SquirterTM, a tension-indicating washer; new ultrasonic equipment for meas uring bolt stretch or preload, including a plasma-coated, thin-film, ultrasonic transducer; a NASA procedure for selecting preload for space shuttle bolts, revised specifications and definitions for the design of joints loaded in shear; and current practices and tools for mass production bolting.
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