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Embed Size px x x x x The right of S. Hu, Z. Marciniak and J. Duncan to be identified as the authors of this work has beenasserted in accordance with the Copyright, Designs and Patents Act All rights reserved. No part of this publicationmay be reproduced in any material form includingphotocopying or storing in any medium by electronicmeans and whether or not transiently or incidentallyto some other use of this publication without thewritten permission of the copyright holder exceptin accordance with the provisions of the Copyright,Designs and Patents Act or under the terms of alicence issued by the Copyright Licensing Agency Ltd,90 Tottenham Court Road, London, England W1T 4LP.
Applications for the copyright holders written permissionto reproduce any part of this publication should be addressedto the publishers. Appendix A1 Yielding in three-dimensional stress state Appendix A2 Large strains: an alternative definition The first edition of this book was published a decade ago; the Preface stated the objectivein the following way.
In this book, the theory of engineering plasticity is applied to the elements of commonsheet metal forming processes. Bending, stretching and drawing of simple shapes areanalysed, as are certain processes for forming thin-walled tubing.
Where possible,the limits governing each process are identified and this entails a detailed study oftensile instability in thin sheet. To the authors knowledge, this is the first text in English to gather together themechanics of sheet forming in this manner.
It does, however, draw on the earlierwork of, for example, Swift, Sachs, Fukui, Johnson, Mellor and Backofen althoughit is not intended as a research monograph nor does it indicate the sources of themodels. It is intended for the student and the practitioner although it is hoped that itwill also be of interest to the researcher.
This second edition keeps to the original aim, but the book has been entirely rewritten toaccommodate changes in the field and to overcome some earlier deficiencies. ProfessorHu joined the authors and assisted in this revision. Worked examples and new problems with sample solutions have been added as well as new sections including one on hydro-forming.
Some of the original topics have been omitted or given in an abbreviated formin appendices. In recent years, enormous progress has been made in the analysis of forming of complexshapes using finite element methods; many engineers are now using these systems toanalyse forming of intricate sheet metal parts. There is, however, a wide gulf between thestatement of the basic laws governing deformation in sheet metal and the application oflarge modelling packages.
This book is aimed directly at this middle ground. At the oneend, it assumes a knowledge of statics, stress, strain and models of elastic deformation ascontained in the usual strength of materials courses in an engineering degree program.
Atthe other end, it stops short of finite element analysis and develops what may be calledmechanics models of the basic sheet forming operations. These models are in manyrespects similar to the familiar strength of materials models for bending, torsion etc. This approach hasproved helpful to engineers entering the sheet metal field.
They are confronted with an. Experienced sheet metalengineers also find the approach useful in conceptual design, in making quick calculationsin the course of more extensive design work, and in interpreting and understanding thefinite element simulation results. Nevertheless, users of these models should be aware ofthe assumptions and limitations of these approximate models as real sheet metal designscan be much more complex than what is captured by the models.
The order in which topics are presented has been revised. It now follows a patterndeveloped by the authors for courses given at graduate level in the universities and tosheet metal engineers and mechanical metallurgists in industry and particularly in theautomotive field. The aim is to bring students as quickly as possible to the point wherethey can analyse simple cases of common processes such as the forming of a sectionin a typical stamping.
To assist in tutorial work in these courses, worked examples aregiven in the text as well as exercises at the end of each chapter. Detailed solutions of theexercises are given at the end of the text.
The possibility of setting interesting problems isgreatly increased by the familiarity of students with computer tools such as spread sheets.
Although not part of this book, it is possible to go further and develop animated modelsof processes such as bending, drawing and stamping in which students can investigate theeffect of changing variables such as friction or material properties. At least one packageof this kind is available through Professor Duncan and Professor Hu. Many students and colleagues have assisted the authors in this effort to develop asound and uncomplicated base for education and the application of engineering in sheetmetal forming.
It is impossible to list all of these, but it is hoped that they will be awareof the authors appreciation. The authors do, however, express particular thanks.
View Download 7 Category Documents. Marciniak, J. DuncanAll rights reserved The right of S. Duncan to be identified as the authors of this work has beenasserted in accordance with the Copyright, Designs and Patents Act All rights reserved. Applications for the copyright holders written permissionto reproduce any part of this publication should be addressedto the publishers British Library Cataloguing in Publication DataA catalogue record for this book is available from the British Library Library of Congress Cataloguing in Publication DataA catalogue record for this book is available from the Library of Congress ISBN 0 0 For information on all Butterworth-Heinemann publications visit our website at www.
They are confronted with an ix industry that appears to be based entirely on rules and practical experience and theyrequire some assistance to see how their engineering training can be applied to the designof tooling and to the solution of problems in the stamping plant.
Donositelji Svitanja - Barbara Marciniak Documents. Barbara Marciniak Pledijanci Documents. Barbara Marciniak - Mesaje din constelatia Pleiadelor. Mechanics of Sheet Metal Forming - College of ceb. Mechanics of Sheet Metal Forming
HD637 S 1999
Embed Size px x x x x Marciniak and J. Duncan, Edward Arnold, Sevenoaks, Kent, ISBN 0 9, This is a useful book specializing on the mechanics of sheet metal forming, which is an important manufacturing activity in industry. As the authors rightly point out, it is intended for the student and the practising engineer.
Mechanics of Sheet Metal Forming (Marciniak)
Embed Size px x x x x The right of S. Hu, Z. Marciniak and J. Duncan to be identified as the authors of this work has beenasserted in accordance with the Copyright, Designs and Patents Act
Donositelji Svitanja Barbara Marciniak
Embed Size px x x x x Mi sm o Plejadanci, jedan energetski kolektiv i dolazimo iz vase buducnosti. Iza nas je duga povijest. Nasi preci su dosli iz jednog svem ira koji je vec iskusio zavrsetak. Vi sada radite na jednoj planeti koja upravo stoji pred zavrsetkom jednog ciklusa, a mi sm o tu da vam pri tom e pomognemo. Ova transformacija se najavljuje vec eonima.