Abstract
The purpose of this study was to reveal the effect of printing direction and post-printing conditions on static and fatigue bending characteristics of Ultem 9085 at two stress levels. Right after the printing, the Ultem samples were subjected to three cooling conditions: cooling in the printer from 180 to 45 °C for 4 h, rapid removal from the printer and cooling in the oven from 200 to 45 °C during 4 h, and removal from the printer and cooling at room temperature. Static 3-point bending tests were performed to estimate the flexural characteristics of Ultem 9085 samples after subjecting them to different post-printing conditions. The flexural strain was evaluated and applied for the stress ratios such as 75% and 50% of σmax. Thus, displacement-controlled fatigue tests were carried out to reveal the effect of post-printing conditions on fatigue bending characteristics. The results obtained for the X and Y printing directions proved that the Ultem samples subjected to the cooling conditions in the printer and the oven had a similar static and fatigue behavior, while a lower performance was obtained for the samples cooled at room temperature. Regardless of the cooling regime, significantly lower bending performance was revealed for the samples printed in the Z-direction since they have intra-layer filaments parallel to the stress plane, and, accordingly, intra-layer adhesion has a crucial influence on mechanical performance.
Original language | English |
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Article number | 316 |
Journal | Journal of Composites Science |
Volume | 7 |
Issue number | 8 |
DOIs | |
Publication status | Published - Aug 2023 |
Externally published | Yes |
Keywords*
- cooling conditions
- fatigue
- fused filament fabrication
- mechanical properties
- thermal history
- Ultem 9085
Field of Science*
- 2.5 Materials engineering
- 2.4 Chemical engineering
Publication Type*
- 1.1. Scientific article indexed in Web of Science and/or Scopus database