_STP_687-1979.pdf

PART-THROUGH CRACK FATIGUE LIFE PREDICTION 9 A symposium sponsored by ASTM Committee E-24 on Fracture Testing AMERICAN SOCIETY FOR TESTING AND MATERIALS San Diego,Calif.,13-14 Oct.1977 ASTM SPECIAL TECHNICAL PUBLICATION 687 J.B.Chang,Rockwell International,editor List price$26.25 04-687000-30 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,Philadelphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:56:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Copyright by AMERICAN SOCIETY FOR TESTING AND MATERIALS 1979 Library of Congress Catalog Card Number:79-53285 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Baltimore,Md.October 1979 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:56:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword This publication on Part-Through Crack Fatigue Life Prediction con-tains papers presented at a symposium held 13-14 Oct.1977 at San Diego,Calif.The symposium was sponsored by the American Society for Testing and Materials through its Committee E-24 on Fracture Testing.J.B.Chang,Rockwell International Military Aircraft Division,served as symposium chairman and editor of this publication.Those who served as session chairmen were J.P.Gallagher,University of Dayton Research Institute;G.A.Vroman,Rockwell International/Rocketdyne;and C.M.Hudson,NASA/Langley Research Center.Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:56:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Cyclic Stress-Stain and Plastic Deformation Aspects of Fatigue Crack Growth,STP 637(1977),$25.00,04-637000-30 Thermal Fatigue of Materials and Components,STP 612(1976),$27.00,04-612000-30 Fatigue Crack Growth Under Spectrum Loads,STP 595(1976),$34.50,04-595000-30 Handbook of Fatigue Testing,STP 566(1974),$17.25,04-566000-30 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:56:56 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 unher-alded efforts of the reviewers.This body of technical experts whose dedica-tion,sacrifice of time and effort,and collective wisdom in reviewing 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);Mon Dec 21 11:56:56 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 Helen Mahy,Assistant Editor Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:56:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction 1 Surface Crack Life Prediction:An OverviewT.A.CRUSE,A.E.GEMMA,R.F.LACROIX,AND T.G.MEYER 3 A Review and Assessment of the Stress-Intensity Factors for Surface Cracksj.c.NEWMAN,JR.16 Development of Basic Material(s)Data for Evaluating Crack Growth LifeR.J.Bucci 47 Aspect Ratio Variability in Part-Through Crack Life Analysis R.M.ENGLE,JR.74 Life Prediction Analysis of Part-Through CracksG.A.VROMAN 89 Part-Through Crack Growth Predictions Using Compact Tension Crack Growth Rate Dataj.L.RUDD 96 NASA-Langley Research Centers Participation in a Round-Robin Comparison Between Some Current Crack-Propagation Prediction Methodsc.M.HUDSON AND P.E.LEWIS 113 Computer-Aided Fracture Mechanics Life Prediction Analysis D.E.PETERSON AND G.A.VROMAN 129 Prediction of Constant Amplitude Fatigue Crack Propagation in Surface Flawsw.s.JOHNSON 143 Assessment of the Sensitivity of Crack Growth Rate Constants to Predictive Accuracy of Part-Through Crack Fatigue Life PredictionsJ.B.CHANG 156 Part-Through Crack Problems in Aircraft StructuresJ.L.RUDD,T.M.HSU,AND H.A.WOOD 168 Surface Crack A-Estimates and Fatigue Life Calculations in Cannon TubesJ.H.UNDERWOOD AND I.F.THROOP 195 Summary 211 Index 215 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:56:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.STP687-EB/Oct.1979 Introduction The practical importance of part-through surface cracks has been recognized for many years.The results of ca