20.500.12556/RUL-160788 Modelling the mechanical response of two-layered artery using thermomechanical analogy approach Modeliranje mehaničkog odziva dvoslojne stijenke arterije uporabom termo-mehaničke analogije This work deals with the prediction of the mechanical response of a section of a human common carotid artery (CCA). The arterial residual stress state is accounted for using the thermomechanical analogy (TMA) approach, which is applied in this work to model the mechanical response of a two-layered arterial structure. The starting point to model the arterial residual stress state is normally the cut-open section, which is in the case of patient-specific artery not known. With TMA approach, however, instead of using the arterial zero-stress cut-open configuration to predict the arterial residual stress state, a thermomechanical model of the CCA is considered with its zero-stress geometry defined based on the actual CCA in vivo configuration. The approximation to the CCA residual stress state is then obtained by exposing the auxiliary CCA model to a volumetric deformation, enforced via adequate thermal dilatations. The approach is validated on a circular arterial model and by predicting the CCA cut-open zero-stress state. Ovaj rad obrađuje problem predviđanja mehaničkog odziva dijela zajedničke arterije glave (ZAG). Zaostala naprezanja u arteriji uzeta su u obzir uporabom termo-mehaničke analogije (TMA), koja se primjenjuje u ovom radu za potrebe modeliranja mehaničkog odziva dvoslojne strukture stijenke arterije. Obično se modeliranju zaostalih naprezanja u arteriji pristupi s uzdužno otvorenim modelom arterije, tzv. cut-open section, koji u slučaju bolesnikove arterije nije poznat. S TMA pristupom, umjesto uporabe uzdužno prerezane stijenke arterije, koja doduše osigurava početno stanje bez zaostalih naprezanja, u termo-mehaničkom modelu zajedničke arterije glave također je postignuto početno stanje bez zaostalih naprezanja ali na modelu stvarne, in vivo arterije. Tim pristupom, zaostalo naprezanje u ZAG aproksimirano je podvrgavanjem ZAG modela obujamskom deformacijom, t.j. primjenom odgovarajućih termičkih dilatacija. Takav pristup potvrđen je na modelu arterije kružnog presjeka i postizanjem stanja bez naprezanja u slučaju uzdužnog rezanja stijenke. common carotid artery finite element method residual stresses thermomechanics metoda konačnih elemenata termo-mehanika zajednička arterija glave zaostala naprezanja true false true Angleški jezik Hrvaški jezik Podatek o licenci CC BY 4.0 je naveden v zapisih za nadrejeno revijo na spletnih straneh DOAJ (https://doaj.org/toc/1848-6339) in HRČAK (https://hrcak.srce.hr/en/tehnicki-vjesnik). (Datum opombe: 5. 9. 2024) Članek v reviji 2024-09-04 14:25:25 2024-09-04 14:25:27 2025-08-08 13:20:03 0000-00-00 00:00:00 2017 0 0 KLJUČNE BESEDE: karotidna arterija, metoda končnih elementov, zaostale napetosti, termomehanika Str. 1369-1384 no. 5 Vol. 24 2017 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 531:616.133:519.6(045) 1330-3651 10.17559/TV-20160831205711 15724059 Urevc,_Flis,_Brumen,_Stok_-_MODELLING_THE_MECHANICAL_RESPONSE_OF_TWO-LAYERED_ARTERY_USING_THERMOMECHANICAL_ANALOGY_APPROACH.pdf Urevc,_Flis,_Brumen,_Stok_-_MODELLING_THE_MECHANICAL_RESPONSE_OF_TWO-LAYERED_ARTERY_USING_THERMOMECHANICAL_ANALOGY_APPROACH.pdf 1 B92E97DE916C01405AF5BB0BB1D92CA1 f18bb19c844893365fd9ea55996ed7c2e7eedd552dbc271792b0626b6bb73549 36072806-6ab9-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189578 https://hrcak.srce.hr/clanak/277452 0 2617d6ac-6c47-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189936 https://hrcak.srce.hr/188233 1 c4337cec-6ab8-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189577 Fakulteta za strojništvo 0 0 0