Table 1 The material properties of the finite element models
Materials | Elastic modulus (MPa) | Poisson ratio | Stiffness coefficient (N/m) | Number of springs | |
|---|---|---|---|---|---|
Skeleton | Cortical bone | 17,000 | 0.3 | ||
Cancellous bone | 129 | 0.2 | |||
Ligaments | The superior pubic ligament | 500 | 24 | ||
The arcuate pubic ligament | 500 | 24 | |||
The sacrospinous ligament | 1400 | 9 | |||
The sacrotuberous ligament | 1500 | 15 | |||
The anterior and capsule sacroiliac ligament | 700 | 27 | |||
The posterior sacroiliac | 1400 | 15 | |||
The interosseous sacroiliac ligament | 2800 | 8 | |||
Titanium implants | 110,000 | 0.3 | |||