# Mechanical and Tribological Performance of Carbon Fiber-Reinforced PETG for FFF Applications
## 3 Results
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & DF & Adj SC & Adj MC & F-Value & \(p\)-Value \\ \hline \multicolumn{5}{c}{**Average thickness**} \\ \hline Model & 8 & 0.34689 & 0.043361 & 77.66 & 0.000 \\ Material & 1 & 0.99236 & 0.992357 & 1777.26 & 0.000 \\ Model-Material & 8 & 0.43558 & 0.054447 & 97.51 & 0.000 \\ Error & 36 & 0.02010 & 0.000558 & & \\ Total & 53 & 1.79492 & & & \\ \hline \multicolumn{5}{c}{DF} & Adj SC & Adj MC & F-Value & \(p\)-Value \\ \hline \multicolumn{5}{c}{**Average width**} \\ \hline Model & 8 & 5.5941 & 0.69926 & 144.68 & 0.000 \\ Material & 1 & 2.7650 & 2.76504 & 572.08 & 0.000 \\ Model-Material & 8 & 2.5772 & 0.32215 & 66.65 & 0.000 \\ Error & 36 & 0.1740 & 0.00483 & & \\ Total & 53 & 11.1103 & & & \\ \hline \multicolumn{5}{c}{DF} & Adj SC & Adj MC & F-Value & \(p\)-Value \\ \hline \multicolumn{5}{c}{**Thickness Deviation**} \\ \hline Model & 8 & 0.34689 & 0.043361 & 77.66 & 0.000 \\ Material & 1 & 0.99236 & 0.992357 & 1777.26 & 0.000 \\ Model-Material & 8 & 0.43558 & 0.054447 & 97.51 & 0.000 \\ Error & 36 & 0.02010 & 0.000558 & & \\ Total & 53 & 1.79492 & & & \\ \hline \multicolumn{5}{c}{DF} & Adj SC & Adj MC & F-Value & \(p\)-Value \\ \hline \multicolumn{5}{c}{**Width Deviation**} \\ \hline Model & 8 & 5.5941 & 0.69926 & 144.68 & 0.000 \\ Material & 1 & 2.7650 & 2.76504 & 572.08 & 0.000 \\ Model-Material & 8 & 2.5772 & 0.32215 & 66.65 & 0.000 \\ Error & 36 & 0.1740 & 0.00483 & & \\ Total & 53 & 11.1103 & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: ANOVA analysis. Figure 17: Compression test deformation effect for PETG and PETG-CF material. ANOVA analysis showing the statistical influence of texturing parameters on surface quality parameters Sa, Sz, and Sk. When analyzing Average Thickness, Average Width, Thickness Deviation, Width Deviation, Force, Displacement, Stress, and Strain against Test Variables and the incorporation of reinforcement, a high statistical significance is observed for both test variables (specimen manufacturing parameters) and the use of reinforcement in all parameters, with a significant influence of reinforcement, except in the case of displacement and strain, where the \(p\)-value indicates no significance of the test parameters. When analyzing Average Thickness, Average Width, Thickness Deviation, Width Deviation, Force, Displacement, Stress, and Strain against Extrusion Temperature, Layer Thickness, and the incorporation of reinforcement, it is observed that for thickness and thickness deviation, temperature has no significance, while layer thickness has much significance, with the influence of layer thickness highly conditioned by the reinforcement due to the interaction of the two factors and their F-value. For width and width deviation, all values have significance, but in this case, temperature is much less significant than layer thickness, and reinforcement incorporation has less influence. Regarding mechanical parameters (Force, Displacement, Stress, and Strain), none seem to be affected by temperature. Similarly, only stress is affected by the interaction of temperature and layer thickness. In all cases, there is a very significant influence of reinforcement incorporation, although in the case of displacement and strain, there is no significance in the case of the interaction between temperature and reinforcement.