New microscale constitutive model of human trabecular bone based on depth sensing indentation technique.
J Mech Behav Biomed Mater
; 85: 162-169, 2018 09.
Article
en En
| MEDLINE
| ID: mdl-29902776
ABSTRACT
A new constitutive model for human trabecular bone is presented in the present study. As the model is based on indentation tests performed on single trabeculae it is formulated in a microscale. The constitutive law takes into account non-linear viscoelasticity of the tissue. The elastic response is described by the hyperelastic Mooney-Rivlin model while the viscoelastic effects are considered by means of the hereditary integral in which stress depends on both time and strain. The material constants in the constitutive equation are identified on the basis of the stress relaxation tests and the indentation tests using curve-fitting procedure. The constitutive model is implemented into finite element package Abaqus® by means of UMAT subroutine. The curve-fitting error is low and the viscoelastic behaviour of the tissue predicted by the proposed constitutive model corresponds well to the realistic response of the trabecular bone.
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Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Ensayo de Materiales
/
Fenómenos Mecánicos
/
Hueso Esponjoso
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Año:
2018
Tipo del documento:
Article