Publication

Soft-tissue viscoelasticity: extension to anisotropy and finite element implementation

2011
Student Projects

Abstract

Biologic tissues such as the annulus fibrosus of the intervertebral disc present viscoelastic and anisotropic responses to mechanical loading. The objective of this semester project is to propose a method to implement routinely anisotropy-modelling in the lab's work. In particular, this projects proposes to assess the orientation of type II collagen fibers in single lamellaes of the (porcine) annulus fibrosus using various imagery techniques. Orientations were determined using a custom made algorithm that provided the data required to define material orientations in the commercial finite element package ABAQUS.

Official source

https://infoscience.epfl.ch/entities/publication/cbe0a4f2-8c5a-4505-9e88-6865e11042f5

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2011
Student Projects

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/cbe0a4f2-8c5a-4505-9e88-6865e11042f5

About this result

Related concepts (32)

Finite element method

The finite element method (FEM) is a popular method for numerically solving differential equations arising in engineering and mathematical modeling. Typical problem areas of interest include the traditional fields of structural analysis, heat transfer, fluid flow, mass transport, and electromagnetic potential. The FEM is a general numerical method for solving partial differential equations in two or three space variables (i.e., some boundary value problems).

Cartilage

Cartilage is a resilient and smooth type of connective tissue. In tetrapods, it covers and protects the ends of long bones at the joints as articular cartilage, and is a structural component of many body parts including the rib cage, the neck and the bronchial tubes, and the intervertebral discs. In other taxa, such as chondrichthyans, but also in cyclostomes, it may constitute a much greater proportion of the skeleton. It is not as hard and rigid as bone, but it is much stiffer and much less flexible than muscle.

Collagen

Collagen (ˈkɒlədʒən) is the main structural protein in the extracellular matrix found in the body's various connective tissues. As the main component of connective tissue, it is the most abundant protein in mammals, making up from 25% to 35% of the whole-body protein content. Collagen consists of amino acids bound together to form a triple helix of elongated fibril known as a collagen helix. It is mostly found in connective tissue such as cartilage, bones, tendons, ligaments, and skin.