Modeling multiaxial damage regional variation in human annulus fibrosus
| Autor: | Amar Mesbah, Fahmi Zaïri, Abderrahman Tamoud, Fahed Zairi |
|---|---|
| Přispěvatelé: | Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 (LGCgE), Université d'Artois (UA)-Université de Lille-Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL) |
| Rok vydání: | 2021 |
| Předmět: |
Biomedical Engineering
Biochemistry Structural complexity Biomaterials [SPI]Engineering Sciences [physics] Collagen network medicine Annulus (firestop) Humans Anisotropy Intervertebral Disc Molecular Biology System identification Annulus Fibrosus Intervertebral disc General Medicine Mechanics Compression (physics) Biomechanical Phenomena Extracellular Matrix Simple shear medicine.anatomical_structure Stress Mechanical Geology Biotechnology |
| Zdroj: | Acta Biomaterialia Acta Biomaterialia, 2021, 136, pp.375-388. ⟨10.1016/j.actbio.2021.09.017⟩ |
| ISSN: | 1878-7568 1742-7061 |
| DOI: | 10.1016/j.actbio.2021.09.017⟩ |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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