Master Thesis - OUFTI-1

3.8 Final design of the support
Now that all the components to include inside the support are dened and the material
used to manufacture it is selected, the nal design of this one must be initiated.
The dierent steps of the box's design are summarized here:
• Firstly, the thickness of the box's "base plate" was xed to 1 mm. This restricted
thickness can be obtained thanks to the selected material (Al − 7075 T 6). Indeed,
this material allows to create proles with very low thickness (that is not the case
of the CFRP for which the manufacturing process is much more complicated). This
thickness of 1 mm was applied everywhere, except around the xations with the
endless screws because it was these parts of the box that sustain the entire weight of
the support. So, to avoid stress concentration that would lead to a fracture of the
support, the thickness of these parts was increased to 2 mm. This step is illustrated
in Figure 3.14.
Figure 3.14: Thickness of the box's "base plate"
• Then, a hole must be added on the side of face −Y to allow the P C 104 connector
from the EPS card to pass next to the support and to reach the connector from the
xEPS card. A set must also be taken into account to avoid any collision between the
support and the connector due to vibrations. This set has a value of 0.5 mm on each
side in our case. This step is illustrated in Figure 3.15.
Figure 3.15: P C 104 connector's hole
• The next step concerns the reinforcers. Their thickness was also xed to 1 mm. The
reinforcers were designed at the upper dimensions of the batteries (in order to be
able to include them inside the box in every case), except for the thickness, for which
they were designed at their lower dimensions. Indeed, the main goal of this support
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