Modelling the mechanical response of two-layered artery using thermomechanical analogy approach

Urevc, Janez (author), Flis, Vojko (author), Brumen, Milan (author), Štok, Boris (author)

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.

• Language: English
• Keywords: common carotid artery, finite element method, residual stresses, thermomechanics
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2017
• Number of pages: Str. 1369-1384
• Numbering: Vol. 24, no. 5
• PID: 20.500.12556/RUL-160788-4dd97f8d-4de8-28a5-e62b-6fd06ee0adf3
• UDC: 531:616.133:519.6(045)
• ISSN on article: 1330-3651
• DOI: 10.17559/TV-20160831205711
• COBISS.SI-ID: 15724059

Copyright

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)

Note

KLJUČNE BESEDE: karotidna arterija, metoda končnih elementov, zaostale napetosti, termomehanika

• Publication date in RUL: 04.09.2024

Record is a part of a journal

• Title: Tehnički vjesnik = Technical gazette
• Shortened title: Teh. vjesn. - Stroj. fak.
• Publisher: Sveučilište u Slavonskom Brodu, Stojarski fakultet, Sveučilište Josipa Jurja Strossmayera u Osijeku, Fakultet elektrotehnike, računarstva i informacijskih tehnologija Osijek, Sveučilište Josipa Jurja Strossmayera u Osijeku, Građevinski i arhitektonski fakultet Osijek
• ISSN: 1330-3651
• COBISS.SI-ID: 15346181

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Croatian
• Title: Modeliranje mehaničkog odziva dvoslojne stijenke arterije uporabom termo-mehaničke analogije

Abstract

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.

• Keywords: metoda konačnih elemenata, termo-mehanika, zajednička arterija glave, zaostala naprezanja