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Material properties used in FE disc models
| Type of element | Elastic modulus (MPa) |
Poisson’s ratio |
||
|---|---|---|---|---|
| Nucleus pulposus * | Hydraulic fluid element | - | - | |
|
Annulus ground
matrix ** |
Neo-Hookean Hexahedral solid element C10=0.348, D1=0.3 |
- | - | |
| Annulus fibres *** | Tension only elastic truss element |
Layers 1,2 | 550 | 0.3 |
| Layers 3,4 | 495 | 0.3 | ||
| Layers 5,6 | 421.5 | 0.3 | ||
| Layers 7,8 | 357.5 | 0.3 | ||
| Endplates | Rigid shell element | - | - | |
