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Nonlinear, large deformation finite-element beam/column formulation for the study of the human spine / Franck J. Vernerey in Journal of engineering mechanics, Vol. 136 N° 11 (Novembre 2010) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 136 N° 11 (Novembre 2010) . - pp.1319-1328 Titre : Nonlinear, large deformation finite-element beam/column formulation for the study of the human spine : investigation of the role of muscle on spine stability Type de document : texte imprimé Auteurs : Franck J. Vernerey, Auteur ; Brian Moran, Auteur Année de publication : 2011 Article en page(s) : pp.1319-1328 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Bioengineering  Stability  Finite  element  method  Deformation  Beams  Columns. Résumé : A nonlinear, large deformation beam/column formulation is used to model the behavior of the human spine under compressive load. The stabilizing roles of muscles are accounted for using Patwardhan’s assumption that muscles act to direct the load along the tangent of the column. Three aspects of the spinal structure are then investigated. First, we look at the effects of two different assumptions for the action of muscles, leading to significant differences in the spine behavior. Second, the difference in mechanical properties between the vertebrae and the spinal disks is explored. Third, a nonlinear mechanical response of the spinal disk that arises from a two-step hierarchical homogenization technique is used. It is found that these factors have an important influence on the overall behavior of the spine structure. The present formulation offers a versatile model to investigate various features of the human spine, while remaining affordable computationally. It also provides an interesting framework for future multiscale studies of the human spine. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v136/i11/p1319_s1?isAuthorized=no [article] Nonlinear, large deformation finite-element beam/column formulation for the study of the human spine : investigation of the role of muscle on spine stability [texte imprimé] / Franck J. Vernerey, Auteur ; Brian Moran, Auteur . - 2011 . - pp.1319-1328. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 136 N° 11 (Novembre 2010) . - pp.1319-1328 Mots-clés : Bioengineering  Stability  Finite  element  method  Deformation  Beams  Columns. Résumé : A nonlinear, large deformation beam/column formulation is used to model the behavior of the human spine under compressive load. The stabilizing roles of muscles are accounted for using Patwardhan’s assumption that muscles act to direct the load along the tangent of the column. Three aspects of the spinal structure are then investigated. First, we look at the effects of two different assumptions for the action of muscles, leading to significant differences in the spine behavior. Second, the difference in mechanical properties between the vertebrae and the spinal disks is explored. Third, a nonlinear mechanical response of the spinal disk that arises from a two-step hierarchical homogenization technique is used. It is found that these factors have an important influence on the overall behavior of the spine structure. The present formulation offers a versatile model to investigate various features of the human spine, while remaining affordable computationally. It also provides an interesting framework for future multiscale studies of the human spine. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v136/i11/p1319_s1?isAuthorized=no