Title of article :
Developmentofsimplifiedevaluationmethodforcreep-fatiguecrackpropagationOriginalResearchArticle
Author/Authors :
NaokiMiura، نويسنده , , YukioTakahashi، نويسنده , , YasunariNakayama، نويسنده , , KenichiFujishita، نويسنده , , TakashiShimakawa، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
Inthedesignassessmentoffastreactorplantcomponents,preventionofcrackinitiationfromdefect-freestructuresisamainconcern.However,existenceofinitialdefectssuchaswelddefectscannotbeentirelyexcludedandthispotentialcracksaretobeevaluatedtodetermineifinitiatedcracksdonotleadtocomponentfailureinstantly.Therefore,evaluationofstructuralintegrityinthepresenceofcrack-likedefectsisalsoimportanttocomplementtheformaldesignassessment.Theauthorshavebeendevelopingaguidelineforassessinglong-termstructuralintegrityoffastreactorcomponentsusingdetailedinelasticanalysisandnonlinearfracturemechanics.Thisguidelineconsistsoftwoparts,evaluationofdefect-freestructuresandflawevaluation.Inthelatter,creep-fatigueisconsideredtobeoneofthemostessentialdrivingforceforcrackpropagationathighoperatingtemperatureexceeding500°C.TheusesofJ-integral-typeparameters(fatigueJ-integralrangeandcreepJ-integral)arerecommendedtodescribecreep-fatiguecrackpropagationbehaviorintheguideline.Thispapergivesanoutlineofthesimplifiedevaluationmethodforcreep-fatiguecrackpropagation.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
