_STP_590-1976.pdf

MECHANICS OF CRACK GROWTH Proceedings of the Eighth National Symposium on Fracture Mechanics A symposium sponsored by Committee E-24 on Fracture Testing of Metals,AMERICAN SOCIETY FOR TESTING AND MATERIALS Brown University,Providence,R.I.,26-28 Aug.1974 ASTM SPECIAL TECHNICAL PUBLICATION 590 J.R.Rice and P.C.Paris,symposium co-chairmen List price$45.25 04-590000-30 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,Philadelphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:42:07 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.?9 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1976 Library of Congress Catalog Card Number:75-18413 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Baltimore,Md.February 1976 Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:42:07 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Dedication This volume is dedicated with profound appre-ciation to the memory of the late Donald P.Wisdom,ASTM Staff Liaison Officer to Commit-tee E-24 from 1971 until his untimely decease in September 1974.His good-natured guidance and helpfulness were particularly appreciated by the Committees Officers and Members.He helped to organize and attended the symposium.May he rest in peace.Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:42:07 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword This publication,Mechanics of Crack Growth,contains papers pre-sented at the Eighth National Symposium on Fracture Mechanics which was held at Brown University,Providence,R.I.,26-28 Aug.1974.The symposium was sponsored by Committee E-24 on Fracture Testing of Metals of the American Society for Testing and Materials.J.R.Rice and P.C.Paris,Brown University,presided as symposium co-chairmen.Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:42:07 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Resistance to Plane-Stress Fracture(R-Curve Behavior)of A572 Struc-tural Steel,STP 591(1976),$5.25,04-591000-30 Fracture Analysis,STP 560(1974),$22.75,04-560000-30 Fracture Toughness and Slow-Stable Cracking,STP 559(1974),$25.25,04-559000-30 Fatigue and Fracture Toughness-Cryogenic Behavior,STP 556(1974),$20.25,04-556000-30 Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:42:07 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 unheralded 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 publications 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 09:42:07 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 Charlotte E.Wilson,Senior Assistant Editor Ellen J.McGlinchey,Assistant Editor Copyright by ASTM Intl(all rights reserved);Sat Dec 5 09:42:07 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction 1 J-Integral Estimates for Strain Hardening Materials in Antiplane Shear Using Fully Plastic Solutions-c.F.SHIH 3 Fully Plastic Problem for Antiplane Shear 4 Estimation Procedures for Two Strain-Hardening Laws 9 An Assessment of the Proposed Estimation Procedures 14 Conclusion 18 Single Specimen Tests for Jc Determination-G.A.CLARKE,W.R.ANDREWS,P.C.PARIS,AND D.W.SCHMIDT 27 Theoretical Considerations 28 Material 32 Test Procedures 32 Results 34 Discussion 37 Conclusions 42 Elastic Plastic(Jlc)Fracture Toughness Values:Their Experimental Deter-mination and Comparison with Conventional Linear Elastic(Kk)Fracture Toughness Values for Five Materials-w.A.LOGSDON 43 Materials and Specimens 45 Experimental Procedure 46 Results and Discussion 49 Conclusions 58 Application of the J-Integral to the Initiation of Crack Extension in a Titanium 6AI-4V AlloywG.R.YODER AND C.A.GRIFFIS 61 Experimentation 63 Results and Discussion 67 Summary 79 Fatigue Crack Growth During Gross Plasticity and the J-Integral-N.E.DOWLING AND J.A.BEGLEY 82 Preliminary 82 Experiment