Table 4.
Result of compressive strength and surface roughness for PLA printed samples and its improvement using ultrasonic-assisted FDM.
| Run |
Control Factors |
Response Values |
Improvement compared to 0 kHz (%) |
|||
|---|---|---|---|---|---|---|
| Build Orientation | Ultrasonic Frequency (kHz) | Compressive Strength (MPa) | Surface Roughness, Ra (μm) | Compressive Strength (MPa) | Surface Roughness, Ra (μm) | |
| 1 | X | 0 | 31.8556 | 7.2367 | – | – |
| 2 | X | 10 | 31.2301 | 12.1133 | −1.9635 | 67.3871 |
| 3 | X | 20 | 32.293 | 10.9433 | 1.3731 | 51.2195 |
| 4 | Z | 0 | 36.5582 | 8.43 | – | – |
| 5 | Z | 10 | 36.4505 | 9.4067 | −0.2946 | 11.5860 |
| 6 | Z | 20 | 36.2703 | 9.0267 | −0.7875 | 7.0783 |