Biomedical Engineering Reference
In-Depth Information
(a)
Model 1
Model 2
Model 3
(b)
Model 1
Model 2
Model 3
Fig. 6 a Load of 343.35 N acting at the head of right proximal femurs at 24.4. b Load of
343.35 N acting at the head of right proximal femurs at 28
Boundary Conditions
The femur is a thigh bone and both the left and right femurs in an individual
human shares the whole body weight equally . Thus, in this study a constant body
weight of 70 kg (686.7 N) is shared equally by both femurs [
10
]. Therefore, a load
of 343.35 N is applied on the right femur head of every model at an angle of 24.4
and 28 for comparative study [
10
,
19
,
20
] and a fixed support is provided at lateral
condyle, medial condyle, and patellar surface in every model. The boundary
conditions are as shown in Fig.
6
a, b.
Results
The total deformation, equivalent Von Mises stress, and maximum principal stress
evaluated in the 3D FEA are shown Figs.
7
,
8
, and
9
. A constant Fatigue life of 1e6
is obtained throughout the whole femur for all models of 17, 32, and 40-year-
human male patients. The safety factor evaluated for each model is shown in
Fig.
10
. The comparative study shows the percentage variation in each model
under study as shown in Table
1
.
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