Identification of viscoelastic properties of artificial materials simulating vascular wall

Polansky, John; Boiron, Olivier; Novacek, V.

doi:10.1080/10255840512331389046

Cited by 4 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Samples of polyurethane AAA were tested on a classical traction bench and the five-element generalized Maxwell model was used to describe their stress relaxation behaviour (Polansky et al, 2005). We obtained a Young's modulus E equal to 5:16 Â 10 5 Pa.…”

Section: Measurementsmentioning

confidence: 99%

Flow behaviour in an asymmetric compliant experimental model for abdominal aortic aneurysm

Deplano¹,

Knapp²,

Bertrand³

et al. 2007

Journal of Biomechanics

View full text Add to dashboard Cite

Section: Measurementsmentioning

confidence: 99%

Flow behaviour in an asymmetric compliant experimental model for abdominal aortic aneurysm

Deplano¹,

Knapp²,

Bertrand³

et al. 2007

Journal of Biomechanics

View full text Add to dashboard Cite

“…This test is comparable to the loading frequency when simulating flow, though the amplitude is exaggerated, as the minimum strain is not representative of that at dia-.stolic pressure. A relaxation te.st was also conducted to as.sess viscoela.stic properties [35]. The relaxation test showed an 8% decrease in the linearly estimated modulus when utilizing the relaxed stress values instead of the peak values at each strain.…”

Section: Materials Testingmentioning

confidence: 99%

Stereoscopically Observed Deformations of a Compliant Abdominal Aortic Aneurysm Model

Meyer

Bertrand

Boiron

et al. 2011

Journal of Biomechanical Engineering

View full text Add to dashboard Cite

A new experimental setup has been implemented to precisely measure the deformations of an entire model abdominal aortic aneurysm (AAA). This setup addresses a gap between the computational and experimental models of AAA that have aimed at improving the limited understanding of aneurysm development and rupture. The experimental validation of the deformations from computational approaches has been limited by a lack of consideration of the large and varied deformations that AAAs undergo in response to physiologic flow and pressure. To address the issue of experimentally validating these calculated deformations, a stereoscopic imaging system utilizing two cameras was constructed to measure model aneurysm displacement in response to pressurization. The three model shapes, consisting of a healthy aorta, an AAA with bifurcation, and an AAA without bifurcation, were also evaluated with computational solid mechanical modeling using finite elements to assess the impact of differences between material properties and for comparison against the experimental inflations. The device demonstrated adequate accuracy (surface points were located to within 0.07 mm) for capturing local variation while allowing the full length of the aneurysm sac to be observed at once. The experimental model AAA demonstrated realistic aneurysm behavior by having cyclic strains consistent with reported clinical observations between pressures 80 and 120 mm Hg. These strains are 1-2%, and the local spatial variations in experimental strain were less than predicted by the computational models. The three different models demonstrated that the asymmetric bifurcation creates displacement differences but not cyclic strain differences within the aneurysm sac. The technique and device captured regional variations of strain that are unobservable with diameter measures alone. It also allowed the calculation of local strain and removed rigid body motion effects on the strain calculation. The results of the computations show that an asymmetric aortic bifurcation created displacement differences but not cyclic strain differences within the aneurysm sac.

show abstract

“…Также распространение получили задачи восстановления коэффициентов вязкоупругих моделей и неоднородных характеристик тела при возбуждении колебаний в нем [16,17]. В работе [18] исследованы математические аспекты ультразвукового сканирования биологических тканей и реконструкции их свойств, в частности модуля сдвига, при этом в качестве регуляризующего алгоритма при нахождении градиентов полей использован метод B-сплайнов.…”

Section: Introductionunclassified

The inverse coefficient problem for dissipative operators and identification of the properties of viscoelastic materials

Ватульян¹,

Bogachev²

2012

Владикавказский Математический Журнал

View full text Add to dashboard Cite

Представлена общая постановка обратной задачи идентификации неоднородных характеристик вязкоупругого тела, сформулировано вариационное уравнение. Рассмотрена задача о восстановлении функций-коэффициентов диссипативных операторов, возникающих при решении ряда задач об идентификации свойств слоистых неоднородных вязкоупругих структур на основе анализа спектральных характеристик. Представлены способы построения итерационного процесса, приведены результаты вычислительных экспериментов по восстановлению функций различных типов.

show abstract

Identification of viscoelastic properties of artificial materials simulating vascular wall

Cited by 4 publications

References 1 publication

Flow behaviour in an asymmetric compliant experimental model for abdominal aortic aneurysm

Flow behaviour in an asymmetric compliant experimental model for abdominal aortic aneurysm

Stereoscopically Observed Deformations of a Compliant Abdominal Aortic Aneurysm Model

The inverse coefficient problem for dissipative operators and identification of the properties of viscoelastic materials

Contact Info

Product

Resources

About