An experimental methodology for arterial walls
| Autor: | Pierre Galvagni Silveira, Jakson Manfredini Vassoler, Carlos Rodrigo de Mello Roesler, Ana Bárbara Krummenauer Formenton |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Experimental procedure QH301-705.5 Computer science ENEBI anisotropic viscoelastic model Constitutive equation uniaxial tests Viscoelasticity Anisotropic viscoelastic model Uniaxial tests 03 medical and health sciences Experimental testing experimental procedure Biology (General) Computer simulation business.industry Experimental data Agriculture arterial walls Structural engineering Biological tissue 030104 developmental biology Arterial walls General Agricultural and Biological Sciences business |
| Zdroj: | Bioscience Journal, Vol 32, Iss 6 (2016) Bioscience Journal ; Vol. 32 No. 6 (2016): Nov./Dec.; 1717-1728 Bioscience Journal ; v. 32 n. 6 (2016): Nov./Dec.; 1717-1728 Bioscience journal Universidade Federal de Uberlândia (UFU) instacron:UFU |
| ISSN: | 1981-3163 |
| DOI: | 10.14393/bj-v32n1a2016-32480 |
| Popis: | Numerical simulations of arterial walls allow a better understanding of the interaction between biological tissue and endoprosthesis ( stents ), which are used in aneurysms or atherosclerosis stenosis treatment. A reliable understanding of this interaction may help one to select, or even design, the best structure for a given clinical indication. The development of a realistic numerical simulation requires an appropriated definition of a constitutive model and the obtainment of experimental data useful to a parameter identification procedure. Biological tissues have different mechanical characteristics of materials commonly used for engineering applications, however the experimental data acquisition is a major challenge. Some examples of technical difficulties of experimental test in biological tissue are associated to the obtainment of samples, temperature and humidity control during storage, suitable gripping and geometric and strain measurements methods. Therefore, this paper presents an experimental methodology to perform uniaxial mechanical tests in pig arteries in order to provide useful information for material models of arterial walls. This study proposes the experimental procedure from the sample obtainment to the uniaxial experimental testing of the tissue in two directions (circumferential and longitudinal) at two strain rates. In order to shown the use of the experimental data into a suitable numerical model for arterial walls, a parameter identification procedure was performed to obtain material parameters of a viscoelastic anisotropic model with fiber dispersion for finite strains. Through the experimental methodology proposed it was possible to obtain useful data for the parameter identification. Moreover, the results demonstrate that the arterial walls mechanical behavior was properly represented by the selected model. |
| Databáze: | OpenAIRE |
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