Title :

Modeling multiaxial damage regional variation in human annulus fibrosus

Author(s) :

Tamoud, Abderrahman [Auteur]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]
Université des Sciences et de la Technologie Houari Boumediene = University of Sciences and Technology Houari Boumediene [Alger] [USTHB]
Zairi, Fahmi [Auteur]
Laboratoire Génie Civil et géo-Environnement (LGCgE) - ULR 4515
Mesbah, Amar [Auteur]
Zairi, Fahed [Auteur]
Hôpital Privé Le Bois Ramsay Santé [Lille]

Journal title :

Acta Biomaterialia

Abbreviated title :

Acta Biomater

Volume number :

136

Pages :

375-388

Publisher :

Elsevier

Publication date :

2021-09-18

ISSN :

1878-7568

English keyword(s) :

Multiaxial damage and failure
Annulus fibrosus
Regional dependence
Multiscale structure

HAL domain(s) :

Sciences du Vivant [q-bio]
Sciences de l'ingénieur [physics]

English abstract : [en]

In the present article, a fully three-dimensional human annulus fibrosus model is developed by considering the regional variation of the complex structural organization of collagen network at different scales to predict ...
Show more >In the present article, a fully three-dimensional human annulus fibrosus model is developed by considering the regional variation of the complex structural organization of collagen network at different scales to predict the regional anisotropic multiaxial damage of the intervertebral disc. The model parameters are identified using experimental data considering as elementary structural unit, the single annulus lamellae stretched till failure along the micro-sized collagen fibers. The multi-layered lamellar/inter-lamellar annulus model is constructed by considering the effective interactions between adjacent layers and the chemical-induced volumetric strain. The regional dependent model predictions are analyzed under various loading modes and compared to experimental data when available. The stretching along the circumferential and radial directions till failure serves to check the predictive capacities of the annulus model. Model results under simple shear, biaxial stretching and plane-strain compression are further presented and discussed. Finally, a full disc model is constructed using the regional annulus model and simulations are presented to assess the most likely failed areas under disc axial compression. STATEMENT OF SIGNIFICANCE: The damage in annulus soft tissues is a complex multiscale phenomenon due to a complex structural arrangement of collagen network at different scales of hierarchical organization. A fully three-dimensional constitutive representation that considers the regional variation of the structural complexity to estimate annulus multiaxial mechanics till failure has not yet been developed. Here, a model is developed to predict deformation-induced damage and failure of annulus under multiaxial loading histories considering as time-dependent physical process both chemical-induced volumetric effects and damage accumulation. After model identification using single lamellae extracted from different disc regions, the model predictability is verified for various multiaxial elementary loading modes representative of the spine movement. The heterogeneous mechanics of a full human disc model is finally presented.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CNRS
Centrale Lille
IMT Lille Douai
INSERM
Institut Catholique Lille
Univ. Artois
Université de Lille

Collections :

• Laboratoire de Mécanique, Multi-physique, Multi-échelle (LaMcube) - UMR 9013
• Laboratoire Génie Civil et géo-Environnement (LGCgE) - ULR 4515

Submission date :

2022-06-15T14:00:40Z
2023-02-24T17:25:28Z
2025-04-01T11:20:29Z