Biomedical Engineering Reference
In-Depth Information
Fig. 7.49
Three-Dimensional model sectional cut AA
app
¼ 2
:
1 g/cm
3
is imposed to define the initial bone
tissue material properties using the proposed material law. The Poisson ratio is
assumed as t ¼ 0
:
3 and the apparent density control value is considered as
q
control
uniform density distribution q
max
app
¼ 0
:
4 g/cm
3
. The a and b parameters are defined as a = b = 0.01.
In Fig.
7.50
it is presented the evolution of the trabecular bone architecture in
the femur for the distinct mechanical cases.
Notice that it is not possible to visualize clearly the trabecular structure of the
inner bone. The used three-dimensional model was created with a very coarse
nodal mesh, which does not permit the formation of trabecular structures as in the
two-dimensional example. However, it is possible to observe clear density areas,
which are in agreement with the two-dimensional results.
In the following analysis the three-load cases were also applied simultaneously.
As in the two-dimensional example, the first mechanical case was applied with
6,000 cycles per day and the remaining mechanical cases with 2,000 cycles per
day. The results are presented in Fig.
7.50
d.
