Title of article
Investigationofhelix-shapedandtransversecrackpropagationinrotorshaftsbasedondiskshrunktechnologyOriginalResearchArticle
Author/Authors
B.Andrier، نويسنده , , E.Garbay، نويسنده , , F.Hasnaoui، نويسنده , , P.Massin، نويسنده , , P.Verrier، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
17
From page
333
To page
349
Abstract
Itisknownfrominternationalfeedbackthattherotorshaftsoftheturbo-generatorswithdiskshrunktechnologymayhavetransversecrackslocatednearthekeyswhichmaintainthebondbetweenthecoreoftheshaftandthesurroundingdisksincaseofoverspeed.Itwasunderstoodthatthecrackswereinitiatedbyfrettingbetweenthekeysandtheshaftandthattheypropagatedduetoafatiguemechanismgeneratedbytherotationalflexionoftheshaftsundergravity.Thedestructiveobservationnowcorrelatedtotheservicehistoryoftheshaftshowsdifferentmixedmodespropagationphasesandastoppedcircumferentialcrackevolutionduringthelastmonthsofserviceoftheshaft.Mechanicalstudiesbasedonthedeterminationofthestressintensityfactorsprovidetheevolutionofthestressintensityfactorsduringthecrackpropagation.Theygiveaccesstoinformationnotavailableotherwisetoexplaintheobservedcrackprofiles.Finally,experimentalinvestigationsareneededtoobtainthekineticsasafunctionofthestressintensityfactors.Theinformationprovidedishelpfulindeterminingthepossiblecrackprofilestobedetectedbythemostsuitablevibratorysurveillancesystemsbeforefailureinserviceoftheshaftline.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2006
Journal title
Nuclear Engineering and Design Eslah
Record number
895995
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