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Acta of Bioengineering and Biomechanics

Tytuł artykułu

Hyper-elastic modelling of intervertebral disc polyurethane implant

Autorzy Pawlikowski, M.  Skalski, K.  Sowiński, T. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
EN Artificial materials including various kinds of polymers like polyurethanes are more and more widely used in different branches of science and also in biomedical engineering. The paper presents the process of creating a constitutive equation for a polyurethane nanocomposite which is considered to be hyper-elastic. The constitutive modelling was conducted within the range of application of the material as one of the components of lumbar intervertebral disc prosthesis. In the paper, the biomechanics of the lumbar spine and the most frequently applied intervertebral disc prostheses are described. Also a polyurethane nanocomposite as a new material to be applied in prostheses is presented. The way of formulating a constitutive equation by means of mathematical formulae is described. Four various hyper-elastic potential functions are considered, i.e., Ogden, Neo-Hookean, Yeoh and Mooney–Rivlin. On the basis of monotonic compression tests the best hyper-elastic model for the material considered was chosen and hyper-elastic constants were calibrated. Finally, the constitutive model was validated on the basis of FE analysis. The paper ends with a conclusion and presentation of further plans of research directed towards the development of a constitutive equation and its application in computer simulations by means of the finite element method.
Słowa kluczowe
PL równanie konstytutywne   dopasowywanie krzywej  
EN constitutive equation   curve fitting   hyper-elastic constants  
Wydawca Oficyna Wydawnicza Politechniki Wrocławskiej
Czasopismo Acta of Bioengineering and Biomechanics
Rocznik 2013
Tom Vol. 15, nr 2
Strony 43--50
Opis fizyczny Bibliogr. 26 poz., tab., wykr., il.
autor Pawlikowski, M.
autor Skalski, K.
  • Warsaw University of Technology, Institute of Mechanics and Printing, Warszawa, Poland
autor Sowiński, T.
  • Military Institute of Medicine, Department of Orthopaedics, Warszawa, Poland
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