title: Mechanical analysis of the ring opening test applied to human ascending aortas.
abstract: This work presents experiments, modelling and numerical simulation aimed at describing the mechanical response of human ascending aortas in the ring opening test. The objective is to quantify, from the opening angles measured in the test, the residual stress distribution along the artery wall and, afterwards, how this stress pattern changes when the artery is subjected to standard physiological pressures. The cases studied correspond to four groups including both healthy and pathological arteries. The tissues are characterized via tensile test measurements that enable to derive the material parameters of two constitutive models adopted in the present analysis. Overall, the numerical results obtained for all groups were found to be a useful data that allow to estimate the residual stress and their influence on the vessels under normal and hypertension physiological conditions.
authors.affiliation: a Departamento de Ingeniería Mecánica , Universidad de Santiago de Chile, USACH , Santiago de Chile , Chile .
authors.forename: Claudio M
authors.initials: CM
authors.lastname: García-Herrera
authors.affiliation: a Departamento de Ingeniería Mecánica , Universidad de Santiago de Chile, USACH , Santiago de Chile , Chile .
authors.forename: Claudio A
authors.initials: CA
authors.lastname: Bustos
authors.affiliation: b Departamento de Ingeniería Mecánica y Metalúrgica, Instituto de Ingeniería Biológica y Médica (IIBM) , Pontificia Universidad Católica de Chile (PUC) , Santiago de Chile , Chile .
authors.forename: Diego J
authors.initials: DJ
authors.lastname: Celentano
authors.affiliation: a Departamento de Ingeniería Mecánica , Universidad de Santiago de Chile, USACH , Santiago de Chile , Chile .
authors.forename: Roberto
authors.initials: R
authors.lastname: Ortega
mesh_terms: D000328:Adult; D000783:Aneurysm / Q000503:physiopathology; D001011:Aorta / Q000503:physiopathology*; D001696:Biomechanical Phenomena; D003198:Computer Simulation; D005260:Female; D020342:Finite Element Analysis; D006801:Humans; D008297:Male; D008382:Marfan Syndrome / Q000503:physiopathology; D008962:Models, Theoretical; D009716:Numerical Analysis, Computer-Assisted; D011312:Pressure; D013314:Stress, Mechanical; D013718:Tensile Strength; D055815:Young Adult
keywords: Ascending aorta; constitutive models; finite element method; residual stresses