Original scientific paper

https://doi.org/10.17559/TV-20160831205711

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

Janez Urevc ; University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, Slovenia
Vojko Flis ; University Clinical Center Maribor, Department of Vascular Surgery, Ljubljanska ulica 5, 2000 Maribor, Slovenia
Milan Brumen ; Faculty of Natural Sciences and Mathematics, Faculty of Health Sciences, Faculty of Medicine University of Maribor, Slomškov trg 15, 2000 Maribor, Slovenia
Boris Štok ; University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, Slovenia

Abstract

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.

Keywords

common carotid artery; finite element method; residual stresses; thermomechanics

Hrčak ID:

188233

URI

https://hrcak.srce.hr/188233

Publication date:

25.10.2017.

Article data in other languages: croatian

Visits: 2.167 *