Title of article
Effectoflocalwallthinningonthecollapsebehaviorofpipeelbowssubjectedtoacombinedinternalpressureandin-planebendingloadOriginalResearchArticle
Author/Authors
JinWeonKim، نويسنده , , ManGyunNa، نويسنده , , ChiYongPark، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
11
From page
1275
To page
1285
Abstract
Theobjectiveofthisstudywastoinvestigatetheeffectoflocalwallthinningonthecollapsebehaviorofpipeelbowssubjectedtoacombinedinternalpressureandin-planebendingload.Thisstudyevaluatedtheglobaldeformationbehaviorandcollapsemomentoftheelbows,whichcontainedvarioustypesoflocalwall-thinningdefectsattheirintradosorextrados,usingthree-dimensionalelastic–plasticfiniteelementanalysis.Theanalysisresultsshowedthattheglobaldeformationbehavioroflocallywall-thinnedelbowswaslargelygovernedbythemodeofthebendingandtheelbowgeometryratherthanthewall-thinningparameters,exceptforelbowswithconsiderablylargeanddeepwallthinningthatshowedplasticinstabilitiesinducedbylocalbucklingandplasticcollapsinginthethinnedarea.Thereductioninthecollapsemomentwithwall-thinningdepthwasconsiderablewhenlocalbucklingoccurredinthethinnedareas,whereastheeffectofthethinningdepthwassmallwhenovalizationoccurred.Theeffectsofthecircumferentialthinningangleandthinninglengthonthecollapsemomentofelbowswerenotmajorforshallowwall-thinningcases.Fordeeperwall-thinningcases,however,theireffectsweresignificantandthedependenceofcollapsemomentontheaxialthinninglengthwasgovernedbythestresstypeappliedtothewall-thinnedarea.Typically,thereductioninthecollapsemomentduetolocalwallthinningwasclearerwhenthethinningdefectwaslocatedattheintradosratherthantheextrados,anditwasapparentforelbowswithlargerbendradius.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895087
Link To Document