Title of article
Lowcyclefatigueofweldedjoints:newexperimentalapproachOriginalResearchArticle
Author/Authors
K.CKim، نويسنده , , J.TKim، نويسنده , , J.ISuk، نويسنده , , U.HSung، نويسنده , , H.KKwon، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2004
Pages
17
From page
161
To page
177
Abstract
Totakeintoaccountthereducedfatiguestrengthofweldedjoints,areductionlifefactorappliedonfatiguecurves(Jfvalue)wasintroducedintotheRCC-MR[DesignandConstructionRulesforMechanicalComponentsofFBRNuclearIslands,AFCEN,1993],forthedesignandconstructionoffastbreederreactors.Tobetterassessthisfactor,previousworkshowedthatmechanicalbehaviorofaweldedassemblyisinfluencedbythegeometryoftheweldandbytheinteractionofthedifferentcyclicplasticbehaviorofthetwomaterials:basemetal(BM)andweldmetal(WM).Anewprocedure(namedFFAST)wasperformedonweldedjointspecimensextractedfrombutt-weldedpipeconnections(uniaxialtensile–compressiveload).AninnovativeexperimentalapproachisproposedtostudythelocalmechanicalbehavioroftheweldedjointspecimensandthendeterminetheJfparameter.ThemainadvantageofthemethodistoavoidproblemsduetotherelativestiffnessofweldpartversustheBMpartofthespecimen.Acontinuousrecordingofthestressandstrainintheweldallowsanestimationofthemechanicalbehaviorandfinallythefatiguelifeofthejoint.Observationsofthecracksurfaceshowtwodifferentcrackinitiationzonesnearthewelddependingontheloadlevel.Calculationsofthetestsandcomparisonwithexperimentalresultsarepresented.ThesestudiesmakeitpossibletoassessinapracticalwaytheJfdesignmethod.ItappearsthatJfvaluecannotbeconsideredasasinglevalueforitisinfluencedbyseveralfactorsdependingontheweldmentandontheloadlevel.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2004
Journal title
Nuclear Engineering and Design Eslah
Record number
894679
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