Biomedical Engineering Reference
In-Depth Information
x
10
−4
2.5
2
1.5
1
0.5
0
−0.5
−1
−1.5
−2
0
1
2
3
x 10
−4
x (m)
Fig. 14
Configuration at p
tm
D
30:5 cmH
2
O
x
10
−4
2.5
2
1.5
1
0.5
0
−0.5
−1
−1.5
−2
3
0
1
2
x 10
−4
x (m)
Fig. 15
Configuration at p
tm
D
4:0 cmH
2
O
From the standpoint of structural stability, there are limit points at the adhesion
zone border, and therefore it was necessary to apply the arc-length method. Without
the arc-length method each node entering or quitting the adhesion configuration
would snap-through, which leads to numerical instabilities. The degrees of freedom
near limit points present almost horizontal derivatives. Then big displacements
