Biomedical Engineering Reference
In-Depth Information
25
20
15
10
5
0
10
20
30
40
50
60
Angle (Degree)
Figure 5.7
Force - angle curve for an elastomer (B3
1
/
2
inch)
the first phase. The form of this graph depends on the properties of the test material, from
which valuable information can be derived. It can be shown that the speed of grasping
can also affect the force - angle curve, although in this research work we attempted to
ensure that a similar grasping speed was used for all test materials.
5.4 Energy and Steepness
In order to distinguish between the force - angle curves of different materials, average
slope and energy were considered as the criteria. Figure 5.8 shows the experimental
results for a silicone rubber.
The energy of the force - angle curve shown in Figure 5.8 is defined as the area below
the loading curve from the beginning of the loading phase to the angle at which the energy
40
30
20
10
0
600
400
200
0
40
20
0
15
20
25
30
35
40
45
50
Angle (Degree)
Figure 5.8
Force - angle curve for a silicone rubber, average steepness, and energy
