纤维增强热塑性管道熔接补强接头爆破失效机制

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中图分类号：TE952 文献标志码：A

Abstract：Toaddressthecuentchallngesofcoosionsuseptibityfatiguevulnerability，andexcessiveouterdiameterin fiber-reinforcedthermoplasticpipes（RTPs）connection joints，thisstudydesignedanovel fusion-reinforced jointbasedon theoreticalmodeling.Amethodologycombiningfiniteelementsimulationsandbursttestingisemployedtosystematicallyinvestigatethefailure mechanismsoffusion-reinforced jointsofRTPsunderburstloadingconditions.Theprogressivedamage evaluationmethodbasedontheVUMATsubroutinewasdevelopedbycombining the3DHashinfailurecriterionwiththemaximumstresscriterion，andintegratingresidualstiffess modelingandcohesivezonemodeling.Experimentaland numerical resultsdemonstratethattheultimatefailuremodeis thefailureoftheadhesivelayerandthefusionzone.Thedamage evolutionprocessprogresesthroughfourdistinctstages，namelytheinitialudamagedstage，theadhesivelayerdamagestag，the matrixdamagestage，andthefinalcatastrophicfailurestage.Thedamageoftheadhesivelayerspreadsfrombothendsof the jointtowardsthecenter，withinsufficientshearstrengthoftheadhesiveinterfaceidentifiedastheprimarycontributingfactor. Matrixdamage intheRTsreinforcementlayerinitiallyoccursadjacenttothejointinterfaceandprogressvelyextendstononjointregions.The matrixdamage in the jointarea is influenced bythe expansion lawof theadhesive layer damage

Keywords：reinforced thermoplastic pipes；joint design；progressive damage；burst failure；cohesive zone mode

纤维增强热塑性管道作为新型非金属复合管，兼具高强度、耐腐蚀及柔性输送优势，已逐步开始应用于海洋与陆上油气田[1-2]。（剩余12354字）