Fatigue Assessment of Welded Joints by Local Approaches.pdf

Fatigue Assessment of Welded Joints by Local Approaches.pdf

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FatigueassessmentofweldedjointsbylocalapproachesRelatedtitles:

Cumulativedamageofweldedjoints（ISBN-13:

978-1-85573-938-3;ISBN-10:

1-85573-938-0）Writtenbyoneoftheleadingexpertsinthefield,DrTimGurney,thisimportantbookexaminesfatigueinweldedjoints,bothasaresultofcon-stantloadsandvariableamplitudeloading.FatiguestrengthofweldedstructuresThirdedition（ISBN-13:

978-1-85573-506-4;ISBN-10:

1-85573-506-7）Researchonthefatiguebehaviourofweldedstructureshasimprovedourunderstandingofthedesignmethodsthatcanreduceprematureorpro-gressivefatiguecracking.Thelatesteditionofthisstandardtextincorpo-ratesrecentresearchonunderstandingandpreventingfatigue-relatedfailurethroughgooddesign.Fatigueanalysisofweldedcomponents:

designersguidetothestructuralhot-spotstressapproach（ISBN-13:

978-184569-124-0;ISBN-10:

1-84569-124-5）ThisreportfromtheInternationalInstituteofWeldingprovidespracticalguidanceontheuseofthehot-spotstressapproachtoimproveboththefatigueanalysisanddesignofweldedstructures.DetailsoftheseandotherWoodheadPublishingmaterialsbooksandjour-nals,aswellasmaterialsbooksfromManeyPublishing,canbeobtainedby:

visitingcontactingCustomerServices（e-mail:

saleswoodhead-;fax:

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WoodheadPublishingLtd,AbingtonHall,Abington,CambridgeCB16AH,England）Maneycurrentlypublishes16peer-reviewedmaterialsscienceandengi-neeringjournals.Forfurtherinformationvisitwww.maney.co.uk/journals.FatigueassessmentofweldedjointsbylocalapproachesSecondeditionDRadaj,CMSonsinoandWFrickeCambridgeEnglandWoodheadPublishingandManeyPublishingonbehalfofTheInstituteofMaterials,Minerals&MiningCRCPressBocaRatonBostonNewYorkWashington,DCWoodheadPublishingLimitedandManeyPublishingLimitedonbehalfofTheInstituteofMaterials,Minerals&MiningWoodheadPublishingLimited,AbingtonHall,Abington,CambridgeCB16AH,EnglandPublishedinNorthAmericabyCRCPressLLC,6000BrokenSoundParkway,NW,Suite300,BocaRaton,FL33487,USAFirstpublished1998byAbingtonPublishing,animprintofWoodheadPublishingLimitedSecondedition2006,WoodheadPublishingLimitedandCRCPressLLCWoodheadPublishingLimited,2006Theauthorshaveassertedtheirmoralrights.Thisbookcontainsinformationobtainedfromauthenticandhighlyregardedsources.Reprintedmaterialisquotedwithpermission,andsourcesareindicated.Reasonableeffortshavebeenmadetopublishreliabledataandinformation,buttheauthorsandthepublisherscannotassumeresponsibilityforthevalidityofallmaterials.Neithertheauthorsnorthepublishers,noranyoneelseassociatedwiththispublication,shallbeliableforanyloss,damageorliabilitydirectlyorindirectlycausedorallegedtobecausedbythisbook.Neitherthisbooknoranypartmaybereproducedortransmittedinanyformorbyanymeans,electronicormechanical,includingphotocopying,microfilmingandrecording,orbyanyinformationstorageorretrievalsystem,withoutpermissioninwritingfromWoodheadPublishingLimited.TheconsentofWoodheadPublishingLimiteddoesnotextendtocopyingforgeneraldistribution,forpromotion,forcreatingnewworks,orforresale.SpecificpermissionmustbeobtainedinwritingfromWoodheadPublishingLimitedforsuchcopying.Trademarknotice:

Productorcorporatenamesmaybetrademarksorregisteredtrademarks,andareusedonlyforidentificationandexplanation,withoutintenttoinfringe.BritishLibraryCataloguinginPublicationDataAcataloguerecordforthisbookisavailablefromtheBritishLibrary.LibraryofCongressCataloginginPublicationDataAcatalogrecordforthisbookisavailablefromtheLibraryofCongress.WoodheadPublishingISBN-13:

978-1-85573-948-2（book）WoodheadPublishingISBN-10:

1-85573-948-8（book）WoodheadPublishingISBN-13:

978-1-84569-188-2（e-book）WoodheadPublishingISBN-10:

1-84569-188-1（e-book）CRCPressISBN-13:

978-0-8493-8451-6CRCPressISBN-10:

0-8493-8451-6CRCPressordernumber:

WP8451Thepublisherspolicyistousepermanentpaperfrommillsthatoperateasustainableforestrypolicy,andwhichhasbeenmanufacturedfrompulpwhichisprocessedusingacid-freeandelementarychlorine-freepractices.Furthermore,thepublishersensurethatthetextpaperandcoverboardusedhavemetacceptableenvironmentalaccreditationstandards.TypesetbySNPBest-setTypesetterLtd.,HongKongPrintedbyTJInternationalLimited,Padstow,Cornwall,EnglandContentsForewordxvPrefacexviiAuthorcontactdetailsxix1Introduction11.1Fatiguestrengthassessmentofweldedjoints11.1.1Presentstateoftheart11.1.2Demandsfromindustrialproductdevelopment21.2Basicaspectsofassessmentprocedures31.2.1Multitudeofparametersgoverningfatiguefailure31.2.2Globalandlocalapproachesoffatiguestrengthassessment51.2.3Complicationsoflocalapproachesforweldedjoints81.2.4Surveyofsubjectarrangement102Nominalstressapproachforweldedjoints132.1Basicprocedures132.1.1Principlesofthenominalstressapproach132.1.2Proceduresforweldedjoints132.2Analysistools162.2.1Books,compendia,guidelinesanddesigncodes162.2.2Basicformulae162.2.3PermissiblestressesanddesignSNcurves192.2.4Influenceofmeanandresidualstresses232.2.5Influenceofstressmultiaxiality242.2.6Influenceofplatethickness,welddressingandenvironment27v2.2.7NormalisedSNcurves282.2.8Fatiguestrengthreductionfactors293Structuralstressorstrainapproachforseam-weldedjoints333.1Basicprocedures333.1.1Principlesofthestructuralstressorstrainapproach333.1.2StructuralstrainapproachasproposedbyHaibach343.1.3Hotspotstructuralstressapproachfortubularjoints373.1.4Hotspotstructuralstressapproachfornon-tubularjoints403.1.5Alternativedefinitionsofhotspotstructuralstress403.1.6StructuralstressapproachasproposedbyDong413.1.7StructuralstressapproachasproposedbyXiaoYamada433.1.8Structuralstressapproachtoweldrootfatigue443.2Analysistoolsstructuralstressorstrainevaluation453.2.1Generalsurveyandrelevantguidelines453.2.2Evaluationofhotspotstressesintubularjoints463.2.3Evaluationofhotspotstressesinnon-tubularjoints483.2.4Specificrulesforfiniteelementmodelling513.2.5Furthervariantsofstructuralstressevaluation553.2.6Definitionofstructuralstressconcentrationfactors573.2.7Hotspotstressconcentrationfactorsfortubularjoints593.2.8Hotspotstressconcentrationfactorsfornon-tubularjoints613.3Analysistoolsendurablestructuralstressesorstrains623.3.1EndurablestructuralstrainsintheHaibachapproach62viContents3.3.2Endurablehotspotstressesintubularjoints623.3.3Endurablehotspotstressesinnon-tubularjoints653.3.4EndurablestructuralstressesintheDongandXiaoYamadaapproaches683.3.5Endurablemultiaxialstressesorstrains703.3.6Structuralstressbasedassessmentofweldrootfatigue733.4Demonstrationexamples813.4.1Weldedtubularandbuttjointsstructuralstrainapproach813.4.2Weldedtubularjointsvariousdesignguidelines823.4.3Weldedbridgegirderwithcopeholes843.4.4Weldedjointsinshipstructuresweldtoefatigue843.4.5Weldedjointsinshipstructuresweldrootfatigue894Notchstressapproachforseam-weldedjoints914.1Basicprocedures914.1.1Principlesandvariantsofthenotchstressapproach914.1.2Criticaldistanceapproach944.1.3Fictitiousnotchroundingapproach964.1.4Modifiednotchroundingapproach1014.1.5Highlystressedvolumeapproach1054.2Analysistools1054.2.1Generalsurveyandassessmentprocedure1054.2.2Notchstressanalysisforweldedjoints1074.2.3Notchstressconcentrationfactorsofweldedjoints1084.2.4Fatiguenotchfactorsofweldedjoints1214.2.5Criticaldistanceapproach1254.2.6Fictitiousnotchroundingapproachbasicprocedures1264.2.7Fictitiousnotchroundingapproachrefinedprocedures1314.2.8Fictitiousnotchroundingapproachlinkstostructuralstresses1384.2.9Modifiednotchroundingapproach1434.2.10Highlystressedvolumeapproach145Contentsvii4.3Demonstrationexamples1504.3.1Weldedvehicleframecorner1504.3.2WebstiffenerofweldedIsectiongirder1524.3.3Stressreliefgrooveinweldedpressurevessel1554.3.4End-to-shelljointofboiler1574.3.5Stiffener-to-flangejointatshipframecorner1584.3.6Girthbuttweldsofunusualmanufacture1604.3.7Tensilespecimenwithlongitudinalattachment1614.3.8Gussetedshellstructure1634.3.9Laserbeamweldedbuttandcruciformjoints1654.4Design-relatednotchstressevaluations1664.4.1Comparisonofbasicweldedjointtypes1664.4.2Comparisonofbasicweldloadingmodes1734.4.3Effectofgeometricalweldparameters1804.4.4Typicalapplicationindesign1865Notchstrainapproachforseam-weldedjoints1915.1Basicprocedures1915.1.1Principlesofthenotchstrainapproach1915.1.2Earlyapplicationoftheapproach1955.1.3Comprehensiveexpositionoftheapproach1995.1.4Furtherrefinementsoftheapproach2025.2Analysistools2025.2.1Basicformulaeinearlyapplications2025.2.2Basicformulaeforwiderapplication2065.2.3Specialformulaeformultiaxialfatigue2125.2.4Assessmentprocedure2135.3Demonstrationexamples2145.3.1Fatiguelifeofstress-relievedbutt-weldedjoints2145.3.2Fatiguelifeofbutt-weldedjointswithresidualstresses2175.3.3Fatiguelifeoffillet-weldedcruciformjoints2215.3.4Fatiguelifeofweldedcontainmentdetail2245.3.5Fatiguestrengthofweldedtubularjoint2276Crackpropagationapproachforseam-weldedjoints2336.1Basicprocedures2336.1.1Principlesofthecrackpropagationapproach2336.1.2Peculiaritieswithseam-weldedjoints2356.1.3Short-crackbehaviour2376.1.4Applicationsoftheapproach240viiiContents6.2Analysistools2426.2.1Generalsurveyandrelevantreferences2426.2.2Methodsofstressintensityfactordetermination2436.2.3Crackpropagationequations2456.2.4Crackpropagationlife2476.2.5Stressintensityfactorsforweldedjoints2506.2.6Crackshap