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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-08a4d98c-8f12-4d79-abad-c39ddf99a389

Czasopismo

Acta of Bioengineering and Biomechanics

Tytuł artykułu

Elastic constants influence on the L4-L5-S1 annuli fibrosus behavior, a probabilistic finite element analysis

Autorzy Jaramillo, H. E.  Garcia, J. J. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN A probabilistic finite element (FE) analysis of the L4-L5 and L5-S1 human annulus fibrosus (AF) was conducted to obtain a better understanding of the biomechanics of the AF and to quantify its influence on the range of motion (ROM) of the L4-L5 and L5-S1 segments. Methods: The FE models were composed of the AF and the upper and lower endplates. The AF was represented as a continuous material composed of a hyperelastic isotropic Yeoh matrix reinforced with two families of fibers described with an exponential energy function. The caudal endplate was fully restricted and 8 Nm pure moment was applied to the cranial endplate in flexion, extension, lateral flexion and axial rotation. The mechanical constants were determined randomly based on a normal distribution and average values reported. Results: Results of the 576 models show that the ROM was more sensitive to the initial stiffness of the fibers rather than to the stiffening coefficient represented in the exponential function. The ROM was more sensitive to the input variables in extension, flexion, axial rotation and lateral bending. The analysis showed an increased probability for the L5-S1 ROM to be higher in flexion, extension and axial rotation, and smaller in lateral flexion, with respect to the L4-L5 ROM. Conclusions: An equation was proposed to obtain the ROM as a function of the elastic constants of the fibers and it may be used to facilitate the calibration process of the human spine segments and to understand the influence of each elastic constant on the ROM.
Słowa kluczowe
PL FEM   hiperelastyczność   krążek międzykręgowy   analiza probabilistyczna  
EN finite element analysis   hyperelastic   range of motion   intervertebral discs   probabilistic analysis   sensitivity factor  
Wydawca Oficyna Wydawnicza Politechniki Wrocławskiej
Czasopismo Acta of Bioengineering and Biomechanics
Rocznik 2017
Tom Vol. 19, nr 4
Strony 3--12
Opis fizyczny Bibliogr. 33 poz., rys., tab., wykr.
Twórcy
autor Jaramillo, H. E.
autor Garcia, J. J.
  • Universidad del Valle, Colombia
Bibliografia
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Uwagi
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).
Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-08a4d98c-8f12-4d79-abad-c39ddf99a389
Identyfikatory
DOI 10.5277/ABB-00949-2017-02