_STP_631-1977.pdf

FLAW GROWTH AND FRACTURE#Proceedings of the Tenth National Synnposium on Fracture Mechanics A symposiunn sponsored by ASTM Committee E-24 on Fracture Testing of Metals American Society for Testing and Materials Philadelphia,Pa.,23-25 Aug.1976 ASTM SPECIAL TECHNICAL PUBLICATION 631 J.M.Barsom,symposium chairman List price$49.75 04-631000-30 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,Philadelphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:45:49 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.by AMERICAN SOCIETY FOR TESTING AND MATERIALS 1977 Library of Congress Catalog Card Number:77-73543 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Baltimore,Md,October 1977 Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:45:49 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword This publication,Flaw Growth and Fracture,contains papers presented at the Tenth National Symposium on Fracture Mechanics which was held 23-25 August 1976 at Philadelphia,Pa.The American Society for Testing and Materials Commitee E-24 on Fracture Testing of Metals sponsored the symposium.J.M.Barsom,U.S.Steel Corporation,Monroeville,Pa.,served as symposium chairman.Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:45:49 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Properties of Materials for Liquefied Natural Gas Tankage,STP 579(1975),$39.75(04-579000-30)Mechanics of Crack Growth,STP 590(1976),$45.25(04-590000-30)FractographyMicroscopic Cracking Process,STP 600,(1976),$27.50(04-600000-30)Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:45:49 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.A Note Of Appreciation to Reviewers This publication is made possible by the authors and,also,the un-heralded efforts of the reviewers.This body of technical experts whose dedication,sacrifice of time and effort,and collective wisdom in review-ing the papers must be acknowledged.The quality level of ASTM publica-tions is a direct function of their respected opinions.On behalf of ASTM we acknowledge with appreciation their contribution.ASTM Committee on Publications Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:45:49 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Editorial Staff Jane B.Wheeler,Managing Editor Helen M.Hoersch,Associate Editor Ellen J.McGlinchey,Senior Assistant Editor Kathleen P.Zirbser,Assistant Editor Sheila G.Pulver,Assistant Editor Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:45:49 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction 1 Fracture Mechanics in the Elastic-Plastic Regimep.c.PARIS 3 J-IntegralWhat Is It?4 Crack-Tip Stress and Strain Fields 9 Linear-Elastic Crack-Tip Stress and Strain Fields 10 Elastic-Plastic Crack-Tip Stress and Strain Fields 10 The Intensely Deformed Nonlinear Zone 12 J-Integral Analysis for Monotonic Loading with Abrupt Failure or Stable Tearing 14 J-Integral Rate for Time-Dependent Plasticity 15 Application of J-Integral Analysis to Fatigue-Crack Growth 17 Computation Methods and Estimates for J Determination 19 Summary of the Comprehensive Nature of J-Integral Analysis 24 Comparative Applicability of J-Integral and Other Methods 25 Conclusions 26 Path Dependence of the J-Integral and the Role of/as a Parameter Characterizing the Near-Tip FieldR.M.MCMEEKING 28 Definition of the J-Integral 30 Path Dependence of the J-Integral 31 Path Dependence of the J-Integral in a Rigid-Plastic Model 35 Crack and Notch-Tip Blunting 38 Deformation Near Notch Tips in Incremental and Deformation Theory Materials 39 Fracture Analysis Under Large-Scale Plastic Yielding:A Finite Deformation Embedded Singularity,Elastoplastic Incremental Finite-Element Solutions.N.ATLURI,MICHIHIKO NAKAOAKI,AND WEN-HWA CHEN 42 Brief Description of Formulation 44 Problem Definition 52 Results for J-Integral 53 Conclusions 60 Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:45:49 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Comparison of Compliance and Estimation Procedures for Calculating J-Integral Valuesj.p.HICKERSON,JR.62 Procedures 65 Results and Discussion 68 Conclusions 70 Evaluation of the Toughness of Tliick Medium-Strength Steels by Using Linear-Elastic Fracture