ARDIENTE

MECHANICS
With the introduction of the ribs, the deflection around
the global-x-axis, which was found to be 0.37 mm,
becomes negligible. According to Diana results, the
maximum value obtained with a middle rib is 0.05 mm.
Thus, the rest of the calculations were made only to
find the defections around global-z-axis. Stresses at the
longitudinal mid edges were also calculated.
Case 1 and 2 middle ribs:
With the longitudinal divisions of 1,65m and 1,10mm,
the ratio of the long side to the short side is still more
than 2, so the method is giving the same result of
2.53mm. Stress was calculated at two edges of the
middle front plate. Beam formula fixed at edges was
used, resulting in the same values as the unit without
middle ribs. Diana analysis shows that the maximum
deflection in the front plate of the unit with one middle
rib is not at the centre of the divided piece, but closer
to the ends of the unit.
K
L
M
M
K
L
K
W
FIGURE 95: CASE 1 & 2 MIDDLE RIBS - BEAM DIAGRAM FOR STRESSES
FIGURE 96: CASE 1 & 2 MIDDLE RIBS - BENDING MOMENT DIAGRAM
δ max
L
FIGURE 97: CASE 1 & 2 MIDDLE RIBS - DEFLECTION
FIGURE 98: CASE WITH 3 MIDDLE RIBS - DIANA STRESSES & DEFLECTIONS
FIGURE 99: CASE WITH 5 MIDDLE RIBS - DIANA STRESSES & DEFLECTIONS
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