RESISTANCETOPLANE-STRESSFRACTURE(R-CURVEBEHAVIOR)OFA572STRUCTURALSTEELPresentedatEighthNationalSymposiumonFractureMechanics,BrownUniversity,Providence,R.I.,26-28Aug.1974ASTMSPECIALTECHNICALPUBLICATION591SoR.NovakU.S.SteelCorporationResearchLaboratoryListprice$5.2504-591000-30itTiAMERICANSOCIETYFORTESTINGANDMATERIALS1916RaceStreet,Philadelphia,Pa.19103�9BYAMERICANSOCIETYFORTESTINGANDMATERIALS1976LibraryofCongressCatalogCardNumber:75-18414NOTETheSocietyisnotresponsible,asabody,forthestatementsandopinionsadvancedinthispublication.PrintedmNewCarlisle,OhioFebruary1976ForewordThispublication,ResistancetoPlane-StressFracture(R-CurveBehavior)ofA572StructuralSteel,isoneofthepaperspresentedattheEighthNationalSymposiumonFractureMechanicswhichwasheldatBrownUniversity,Providence,R.I.,26-28Aug.1974.Asummaryonlyappearsintheproceedingsofthissymposium(MechanicsofCrackGrowth,ASTMSTP590).ThesymposiumwassponsoredbyCommitteeE-24onFractureTestingofMetalsoftheAmericanSocietyforTestingandMaterials.J.R.RiceandP.C.Paris,BrownUniversity,presidedassymposiumco-chairmen.RelatedASTMPublicationsMechanicsofCrackGrowth,STP590(1976),$45.25,04-590000-30FractureAnalysis,STP560(1974),$22.75,04-560000-30FractureToughnessandSlow-StableCracking,STP559(1974),$25.25,04-559000-30FatigueandFractureToughness--CryogenicBehavior,STP556(1974),$20.25,04-556000-30ANoteofAppreciationtoReviewersThispublicationismadepossiblebytheauthorsand,also,theunheraldedeffortsofthereviewers.Thisbodyoftechnicalexpertswhosededication,sacrificeoftimeandeffort,andcollectivewisdominreviewingthepapersmustbeacknowledged.ThequalitylevelofASTMpublicationsisadirectfunctionoftheirrespectedopinions.OnbehalfofASTMweacknowledgewithappreciationtheircontribution.ASTMCommitteeonPublicationsEditorialStaffJaneB.Wheeler,ManagingEditorHelenM.Hoersch,AssociateEditorCharlotteE.Wilson,SeniorAssistantEditorEllenJ.McGlinchey,AssistantEditorTableofContentsABSTRACT...........................INTRODUCTION.........................BASICELEMENTSOFR-CURVES.......
