A47 The Liberty Bell/ Bettmann Archive Acquisitions Editor Cliff Robichaud Assistant Editor Catherine Beckham O mETU Production edito bra riege Ken Santor Manufacturing Coordinator Dor lllustration Coordinator Anna Methord 0050355857 This book was set in 10.5/12.5 Times Roman by Ruttle, Shaw Wetherill and printed and bound by Hamilton Printing. The cover was printed by Phoenix Color. Recognizing the importance of preserving what has been written, it is a policy of John Wiley Sons, Inc. to have books of enduring value published in the United States printed on acid-free paper, and we exert our best efforts to that ook was manufactured by a mill whose forest management programs include sustained yield harvesting of its timberlands. Sustained yield harvesting principles ensure that the number of trees cut each year does not exceed the amount of new growth Copyright o 1996 by John wiley Sons, Inc. All rights reserved. Published simultaneously in Canada. No part of this publication may be reproduced, in a retrieval system or transmitted or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States opyright Act, without either the prior written permission of the Publisher, or puyment of the appropriate per- copy fee to the( (978)750-4470. Requests to the Publisher for permission should be addressed to the missions Department, John Wiley Sons, Inc, Ill River Street, Hoboken, NJ07030, (201)748-6011,fax(201)748-6008.E-mail:PermReq@WileY.com. To order books or for customer service please, call 1(800)-CALL-WILEY (225-594 Hertzberg. Richard w.1937- Deformation and fracture mechanics of engineering materials Richard W. Hertzberg 76H461995 9535234