Title of article
FailurestrainsandproposedlimitstrainsforanreactorpressurevesselundersevereaccidentconditionsOriginalResearchArticle
Author/Authors
R.Krieg، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
14
From page
199
To page
212
Abstract
Thelocalfailurestrainsofessentialdesignelementsofareactorvesselareinvestigated.Thesizeinfluenceofthestructureisofspecialinterest.Typicalsevereaccidentconditionsincludingelevatedtemperaturesanddynamicloadsareconsidered.
Themainpartofworkconsistsoftestfamilieswithspecimensunderuniaxialandbiaxialload.Withinonetestfamilythespecimengeometryandtheloadconditionsaresimilar,butthesizeisvarieduptoreactordimensions.Specialattentionisgiventogeometrieswithaholeoranotchcausingnon-uniformstressandstraindistributionstypicalforthereactorvessel.Akeyproblemistodeterminethelocalfailurestrain.Heresuitablemethodshadtobedevelopedincludingtheso-called“vanishinggapmethod”,andthe“forgingdiemethod”.Theyarebasedonpost-testgeometricalmeasurementsofthefracturesurfacesandreconstructionsoftherelatedstrainfieldsusingfiniteelementmodels.
Theresultsindicatethatstressesversusdimensionlessdeformationsareapproximatelysizeindependentuptofailureforspecimensofsimilargeometryundersimilarloadconditions.Localfailurestrainscouldbedetermined.Thevaluesareratherhighandsizedependent.Statisticalevaluationallowtheproposaloflimitstrainswhicharealsosizedependent.Iftheselimitstrainsarenotexceeded,thestructureswillnotfracture.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2005
Journal title
Nuclear Engineering and Design Eslah
Record number
894849
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