STP1372FatigueCrackGrowthThresholds,EnduranceLimits,andDesignJ.C.Newman,Jr.andR.S.Piascik,editorsASTMStockNumber:STP1372ASTM100BarrHarborDriveWestConshohocken,PA19428-2959PrintedintheU.S.A.LibraryofCongressCataloging-in-PublicationDataFatiguecrackgrowththresholds,endurancelimits,anddesign/J.C.NewmanandR.S.Piascik,editors,(STP;1372)"ASTMstocknumber:STP1372."Includesbibliographicalreferencesandindex.ISBN0-8031-2624-71.Metals--Fatigue.2.Metals--Cracking.3.Fracturemechanics.Piascik,RobertS.II1.ASTMspecialtechnicalpublication;1372.TA460.F3752000620.1'66--dc21I.Newman,J.C.II.99-089527Copyright�92000AMERICANSOCIETYFORTESTINGANDMATERIALS,WestConshohocken,PA.Allrightsreserved.Thismaterialmaynotbereproducedorcopied,inwholeorinpart,inanyprinted,mechanical,electronic,film,orotherdistributionandstoragemedia,withoutthewrittenconsentofthepublisher.PhotocopyRightsAuthorizationtophotocopyitemsforinternal,personal,oreducationalclassroomuse,ortheinternal,personal,oreducationalclassroomuseofspecificclients,isgrantedbytheAmericanSocietyforTestingandMaterials(ASTM)providedthattheappropriatefeeispaidtotheCopyrightClearanceCenter,222RosewoodDrive,Danvers,MA01923;Tel:508-750-8400;online:http://www.copyright.com/.PeerReviewPolicyEachpaperpublishedinthisvolumewasevaluatedbytwopeerreviewersandatleastoneedi-tor.Theauthorsaddressedallofthereviewers'commentstothesatisfactionofboththetechnicaleditor(s)andtheASTMCommitteeonPublications.Tomaketechnicalinformationavailableasquicklyaspossible,thepeer-reviewedpapersinthispublicationwereprepared"camera-ready"assubmittedbytheauthors.Thequalityofthepapersinthispublicationreflectsnotonlytheobviouseffortsoftheauthorsandthetechnicaleditor(s),butalsotheworkofthepeerreviewers.Inkeepingwithlong-standingpublicationpractices,ASTMmaintainstheanonymityofthepeerreviewers.TheASTMCommitteeonPublicationsacknowledgeswithappreciationtheirdedicationandcontributionoftimeandeffortonbehalfofASTM.PrintedinPhiladelphia,PAFebruary2000ForewordThispublication,FatigueCrackGrow...