Analysis of different material theories used in a FE model of a lumbar segment motion

Gohari, E ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.5277/abb130204
  3. Publisher: 2013
  4. Abstract:
  5. In this study, a nonlinear poroelastic model of intervertebral disc as an infrastructure was developed. Moreover, a new element was defined consisting a disc (Viscoelastic Euler Beam Element) and a vertebra (Rigid Link) as a unit element. Using the new element, three different viscoelastic finite element models were prepared for lumbar motion segment (L4/L5). Prolonged loading (short-term and long-term creep) and cyclic loading were applied to the models and the results were compared with results of in vivo tests. Simplification of the models by using the new element leads to reduction of the runtime of the models in dynamic analyses to few minutes without losing the accuracy in the results
  6. Keywords:
  7. Creep ; Dynamic loading ; Finite Element Method (FEM) ; Lumbar motion segment ; Poroelastic ; Viscoelastic ; Audiovisual equipment ; Biomechanics ; Elasticity ; Finite element analysis ; Histology ; Human ; Lumbar vertebra ; Mechanical stress ; Motion ; Physiology ; Reproducibility ; Weight bearing ; Biomechanical Phenomena ; Humans ; Lumbar Vertebrae ; Models, Anatomic ; Reproducibility of Results ; Stress, Mechanical ; Viscosity
  8. Source: Acta of Bioengineering and Biomechanics ; Volume 15, Issue 2 , 2013 , Pages 33-41 ; 1509409X (ISSN)
  9. URL: http://www.actabio.pwr.wroc.pl/Vol15No2/4.pdf