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复杂载荷作用下含局部减薄缺陷弯管极限载荷研究.docx

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复杂载荷作用下含局部减薄缺陷弯管极限载荷研究 Title:StudyontheUltimateLoadofBendPipeswithLocalThinningDefectsunderComplexLoading Abstract: Bendpipesarecommonlyusedinvariousindustriessuchasoilandgas,automotive,andaerospace.Thesepipesareoftensubjectedtocomplexloadingconditions,whichmayleadtothedevelopmentofdefectssuchaslocalthinning.Thisstudyaimstoinvestigatethebehaviorandultimateloadofbendpipeswithlocalthinningdefectsundercomplexloading.Acomprehensiveanalysisisconductedusingnumericalsimulationsandexperimentaltesting.Resultsshowthatthepresenceoflocalthinningsignificantlyaffectsthestructuralintegrityandultimateloadofbendpipes.Understandingthebehaviorofbendpipeswithdefectsiscrucialforensuringthesafeandreliableoperationofthesecomponents. 1.Introduction: Bendpipesplayacriticalroleintransportingfluidsandgasesinvariousindustries.Thesepipesaretypicallysubjectedtocomplexloadingconditions,includinginternalpressure,externalforces,andtemperaturevariations.Duetovariousoperationalandenvironmentalfactors,bendpipesarepronetodefectssuchaslocalthinning.Localthinningoccurswhenthethicknessofthepipewallisreducedinaspecificregion,typicallyduetowear,corrosion,orfabricationimperfections.Defectivepipesaremoresusceptibletofailure,leadingtopotentiallycatastrophicconsequences.Therefore,itisessentialtoinvestigatethebehaviorandultimateloadofbendpipeswithlocalthinningdefectsundercomplexloading. 2.LiteratureReview: Severalstudieshavebeenconductedtounderstandthebehaviorofbendpipesunderdifferentloadingconditions.However,limitedresearchfocusesspecificallyontheeffectoflocalthinningdefects.Theavailableliteraturehighlightstheimportanceofconsideringdefectcharacteristics,suchasdepthandlocation,inpredictingthefailurebehaviorofbendpipes.Variousanalyticalandnumericalmodelshavebeenproposedtoanalyzethestressandstraindistributioninpipeswiththinningdefects.Experimentalstudieshavealsobeenconductedtovalidatethenumericalpredictions.However,thereisalackofcomprehensiveinvestigationsontheultimateloadofbendpipeswithlocalthinningdefectsunderco