Mechanical response numerical analysis of bone tissue based on liquid saturated biphasic porous medium model / 生物医学工程学杂志
Journal of Biomedical Engineering
;
(6): 381-386, 2004.
Artigo
em Chinês
| WPRIM
| ID: wpr-291107
ABSTRACT
A biphasic porous medium model based on the mixture theory in continuum mechanics frame was used to depict the distributions of osseous stress field, distortion field and pore pressure when the bone tissue was subject to various dynamic loads. In the model, the bone tissue was considered as a transversely isotropic, liquid saturated porous material. The coupling relationship among the distortion, fluid flow and the streaming potential is studied. The Galerkin weighted residual method was used to derive the finite element formulation for dynamic response and the streaming potential calculating formulation of bone tissue, the penalty finite element formulation was obtained via introducing the ratio term of pressure p and penalty parameter beta in the continuity equation and, in turn, eliminated the pressure term in governing equation sets. The computational results show that the viscoelastic behavior and the energy dissipation property in the bone tissue, especially in the cancellous bone, is caused to a great extent by the pore liquid flow and diffusion. Meanwhile, because of the existence of electrical double layer between the solid phase and liquid phase, when the liquid constituents in the pore diffuse, the streaming potential appears, and the growth and absorption of bone tissue is expedited.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Fisiologia
/
Estresse Mecânico
/
Viscosidade
/
Fenômenos Biomecânicos
/
Biofísica
/
Osso e Ossos
/
Porosidade
/
Análise de Elementos Finitos
/
Elasticidade
/
Eletrofisiologia
Limite:
Humanos
Idioma:
Chinês
Revista:
Journal of Biomedical Engineering
Ano de publicação:
2004
Tipo de documento:
Artigo
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