INVESTIGADORES
FRONTINI patricia Maria
artículos
Título:
BucklingcollapseofHDPEliners:Experimentalset-upandFEM simulations
Autor/es:
FEDERICO RUEDA; A.MARQUEZ; JOSÉ L OTEGUI; FRONTINI, PATRICIA
Revista:
THIN-WALLED STRUCTURES
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2016
ISSN:
0263-8231
Resumen:
The purposeofthisworkistoprovideamorecompleteframeworkforthedevelopmentofshort-termthermoplastic modelstoimprovethedesignoflinerssubjectedtoexternalpressure.Adevicetoperformshort-term physicalcollapsebucklingtestsonHDPElinerstoemulatein-servicebehaviorundercon-trolled conditionswasdesignedandconstructed.Testswereperformedtoexploretheeffectoftem-perature(intherangeof0?60 °C) onthebucklingparametersofaHDPEpipeconfined inasteelhostpipe. Theconstitutivemodelforthismaterialwascalibratedfromcompressionandtensiletests,per-formed atvariousstrainratesandtemperatures.TheThreeNetworkviscoplasticmaterialconstitutivemodel wasadoptedtoreproducematerialbehavior.Full3DFEMsimulationsofcollapsebucklingtestswereconductedandvalidatedagainstexperimentaldata.Oncethe3DfullFEmodelwasverified asimplified 2Dmodelwasgeneratedtoperformanintensiveparametricstudyconsideringmanytem-peraturesandpipeaspectratios.WithdataarisingfromtheparametricstudyapredictiveGlock?s typefunction wasderived,whichtakesintoaccounttheeffectoftemperatureandtheviscoplasticconstitutivebehaviorofHDPE.
