A Linear Material Model for Fiber-Induced Anisotropy of The Anulus Fibrosus  

Oleh:

Setton, Lori A. ; Elliott, Dawn M.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Biomechanical Engineering vol. 122 no. 2 (2000), page 173-179.
Topik: LINEAR; linear material; fiber - induced; anisotropy; anulus fibrosus

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ52.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

The anulus fibrosus (AF) is a lamellar, fibrocartilaginous component of the intervertebral disc, which exhibits highly anisotropic behaviours in tension. These behaviors arise from the material's unique collagen structure. We have investigated the use of a linear, fiber - induced anisotropic model for the AF using a quadratic strain energy density formulation with an explicit representation of the collagen fiber populations. We have proposed a representative set of intrinsic material properties using independent datasets of the AF from the literature and appropriate thermodynamic constraints. The model was validated by comparing predictions with previous experimental data for AF behavior and its dependence on fiber angle. The model predicts that compressible effects may exist for the AF, and suggests that physical effects of the equivalent "matrix," "fiber," "fiber – matrix," and "fiber – fiber," interactions may be important contributors to the mechanical behaviour of the AF.

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