PSI - Issue 19

Aissa Ouballouch et al. / Procedia Structural Integrity 19 (2019) 433–441 Aissa Ouballouch et al./ Structural Integrity Procedia 00 (2019) 000 – 000

440

8

3.3. Total cost For this evaluation, the sample averaged results of the total cost are shown in Table 4. The indicated results were used to create Figure 9.

Table 4. Total cost results

Sample

Material

Total cost 10.4 MAD 10 MAD 9.6 MAD 11.35 MAD

1 2 3 4 5 6 7 1 2 3 4 5 6 7

GRPA with +-45° orientation

11 MAD

10.9 MAD 11.3 MAD 8.6 MAD

KRPA with +-45° orientation

8 MAD

7.5 MAD 9.3 MAD

9 MAD 9 MAD

9.4 MAD

Looking at Figure 9-a), the total cost of KRPA and GRPA parts keeps a trend decrease with increase of print speed. That is due to reduced deposition time when the printing velocity is higher. As can be seen from Figure 9-b), the total cost of KRPA and GRPA parts has a trend decrease with rising of layer thickness. This evolution can be explained by higher deposition time caused by much layers when the thickness is small. Figure 9-c) illustrates the evolution of total cost of KRPA and GRPA materials in function of extrusion temperature. With increase in temperature the total cost value increases for both materials. Regardless of printing parameter the total cost of GRPA is more than KRPA one. Among reasons of this finding the high GRPA filament price.

10 11

1 1 0 0 , , 0 5 1 1 1 1 , , 0 5 12,0

1 1 0 1 , , 4 8 1 1 1 2 , , 2 6 0

a)

b)

c) )

Total Cost of Reinforced PA versus layer thickness

Total cost of Reinforced PA versus print speed

Total Cost of Reinforced PA versus extrusion temperature

245 250 255 260 265 8 8 , , 0 4 8 9 , , 8 2 1 1 9 0 0 , , , 6 0 K GR R P P A A Extrusion Temperature [°C]

7 8 9

8 8 , , 0 5 9 9 , , 0 5 Total Cost [MAD]

K GR R P P A A

Total cost [MAD]

Total Cost [MAD]

K GR R P P A A

50

60

70

0,10

0,15

0,20

Print Speed [mm/s]

Layer Thickness [mm]

Fig. 9. Total cost of RPA as function of processing parameters