Mechanical behavior of annulus fibrosus tissue: identification of a poro-hyper-elastic model from experimental measurementsReport as inadecuate




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1 CGB - Couplages en Géomécanique et Biomécanique LMGC - Laboratoire de Mécanique et Génie Civil

Abstract : Annulus fibrosus AF is the outer tissue of intervertebral disc IVD which is a highly specialized element of the spine that provides flexibility and dissipative capacities. When mechanical loads are transmitted along the spine, IVD mainly supports compression and bending stresses. This results in a hydrostatic excessive pressure in the central nucleus pulposus and generates circumferential tensile stresses in the surrounding AF. To hold these large circumferential strains, AF tissue is assimilated to a composite material made of oriented structures of collagen fibers embedded in a highly hydrated 60−70% matrix 6. This particular microstructure and biphasic composition confers to AF a non-linear and anisotropic behavior. Many experimental studies have underlined the anisotropic and non-linear mechanical behavior of AF using uniaxial tensile tests 5-7. However, few authors have experimentally investigated the biaxial behavior 8.





Author: Adrien Baldit - Dominique Ambard - Fabien Cherblanc - Pascale Royer -

Source: https://hal.archives-ouvertes.fr/



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