PSI - Issue 19

438 6

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

0 - - - 0 0 0 , , , 7 6 5 - - - 0 0 0 , , , 4 3 2 -0 0 0 , , , 1 0 1 0 0 0 , , , 2 3 4 0 0 0 , , , 5 6 7 0,8

245 Length error KRPA Reduced width error KRPA Length error GRPA Reduced width error GRPA Width error KRPA Thickness error KRPA Width error GRPA Thickness error GRPA Dimensional error [mm]

255

265

Extrusion Temperature [°C]

Fig. 6. Dimensional error of RPA as function of extrusion temperature

-Effect of layer thickness: As can be seen from Figure 7, the thickness of layers affects the dimensional accuracy significantly. Also, the effect of material is observed. The most of the errors keep an upward trend with increasing of layer thickness except thickness errors that have some fluctuation around the value 0.15 mm. That can be explained in what concerns thickness error because T=4 mm is not an integer multiple of 0.15 mm. For almost dimensions errors, there is an upward trend with rising of layer thickness but there are lower values of errors for length and thickness at 0.2 mm, maximum value of slice height.

0 0 0 , , , 0 0 1 0 5 0 0 0 0 , , , 1 2 2 5 0 5 0 0 0 , , , 3 3 4 0 5 0 0 0 0 , , , 4 5 5 5 0 5 0 0 , , 6 6 0 5 Length error KRPA Reduced width error KRPA Length error GRPA Reduced width error GRPA Width error KRPA Thickness error KRPA Width error GRPA Thickness error GRPA

- - - 0 0 0 , , , 3 2 2 0 5 0 - - - 0 0 0 , , , 1 1 0 5 0 5

0,1 Dimensional error [mm]

0,15

0,2

Layer Thickness [mm]

Fig. 7. Dimensional error of RPA as function of layer thickness