Author/Authors :
Yun-JaeKim، نويسنده , , Nam-SuHuh، نويسنده , , Young-JinKim، نويسنده ,
Abstract :
ThispaperpresentsexperimentalvalidationofthereferencestressbasedJestimatesforcircumferentialthrough-wallcracked(TWC)pipes,recentlyproposedbytheauthors.UsingthepipetestdataforcircumferentialTWCpipesgiveninthePipeFractureEncyclopedia[PipeFractureTestData,vol.3,Battelle,1997],thepredictedfractureinitiationandinstabilityloadsaccordingtotheproposedreferencestressmethodarecomparedwithexperimentalonesaswellaspredictionsaccordingtothereferencestressmethodembeddedinR6.TheresultsshowthatboththeR6methodandtheproposedmethodgiveconservativeestimatesofinitiationandmaximummomentsforcircumferentialTWCpipes,comparedtoexperimentaldata.Forlongercracks,theproposedmethodreducestheconservatismembeddedintheestimatedJaccordingtotheR6method,andtheresultingpredictionsarelessconservative,comparedtothosefromtheR6method.Forshortercracks,ontheotherhand,theproposedmethodreducespossiblenon-conservatismembeddedinestimatedJaccordingtotheR6method,andtheresultingpredictionsareslightlymoreconservative.
