Title of article
AschemeforfiniteelementanalysisofmodeIandmixedmodestablecrackgrowthandacasestudywithAISI4340steelOriginalResearchArticle
Author/Authors
S.K.Maiti، نويسنده , , S.Namdeo، نويسنده , , A.H.I.Mourad، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
14
From page
787
To page
800
Abstract
Anewschemeforelastic–plasticfiniteelementanalysishasbeenproposedforthestudyofstablecrackgrowth(SCG)frominitiationtoinstabilityinbothmodeIandmixedmodes(IandII).Theschemeisbasedonnode-releasetechniqueandhelpstodeterminethevariationoffractureloadwithcrackextensionwithoutrequiringmuchcomputerstorageandtime.Theschemepermitspredictionsofloadvariationwithloadlinedisplacement(LLD),maximumfractureload,cracktipcurrentplasticzoneandcrackedgeprofile.IntheanalysistheconditionforcrackextensionateverystageoftheSCGisconsideredtobegovernedbyCTOA/CODreachingacriticalvalue.Theschemeofanalysisisdifferentfromtheonesproposedbyearlierinvestigators.ThewholeSCGisanalysedinafewstagesusingtheANSYSsoftwareandasinglediscretization.Elementarrangementinthediscretizationisdecidedfromtheverybeginning;ithasacapabilityofaccommodatingchangesinboundaryconditionsarisingoutofcrackextensioninthelaterstages.Eachstageisanalysedafreshignoringstateofstress–strainreachedatamaterialpointattheendofthepreviousstage.CasestudiesonbothmodeIandmixedmodepresentedconsideringAISI4340steel,whichiswidelyusedinnuclearpowerindustry,indicatethattheSCGthroughitcanbecharacterizedintermsofasingleCODorCTOA.Predictionsfortheinitiationandmaximumfractureloadsinboththecasescompareverycloselywiththeexperimentaldatareported.TheresultspresentedalsoincludethevalueofcriticalCOD/CTOA(0.035mm/0.0875rad)characterizingtheSCGthroughthesteelandshowthattheinitiationloadisnotsignificantlyaffectedbycracktipradiusupto0.05mm.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895045
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