## 3 Results
### Statistical Analysis
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Load (N)** & **Cycles** & **Ra (\(\mu\)m)** & **Rt (\(\mu\)m)** & **Rz (\(\mu\)m)** & \begin{tabular}{c} **Standard Deviation** \\ **Ra (\(\mu\)m)** \\ \end{tabular} & \
\begin{tabular}{c} **Standard Deviation** \\ **Rt (\(\mu\)m)** \\ \end{tabular} &
\begin{tabular}{c} **Standard Deviation** \\ **Rz (\(\mu\)m)** \\ \end{tabular} \\ \hline
0 & 500 & 1.2 & 6.5 & 8 & 0.35 & 0.82 & 1.3 \\
0 & 1000 & 1.5 & 7.2 & 9.1 & & & \\
0 & 1500 & 1.8 & 7.8 & 10.2 & & & \\
0 & 2000 & 2 & 8.5 & 11 & & & \\ \hline
2 & 500 & 1.8 & 8 & 10.5 & 0.35 & 0.82 & 1.3 \\
2 & 1000 & 2.1 & 9 & 12 & & & \\
2 & 1500 & 2.4 & 9.8 & 13.2 & & & \\
2 & 2000 & 2.7 & 10.5 & 14 & & & \\ \hline
5 & 500 & 2.5 & 10 & 13.5 & 0.65 & 2.38 & 2.98 \\
5 & 1000 & 3 & 11.5 & 15 & & & \\
5 & 1500 & 3.5 & 12.8 & 16.5 & & & \\
5 & 2000 & 4 & 14 & 18 & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Evolution of surface roughness and its standard deviation for a Komatsu WA470 bucket knife. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Load (N)** & **Material** & **Ra (\(\mu\)m)** & **Rt (\(\mu\)m)** & **Rz (\(\mu\)m)** & \begin{tabular}{c} **Standard Deviation** \\ **Rz (\(\mu\)m)** \\ \end{tabular} & \begin{tabular}{c} **Standard** \\ **Deviation** **Rz (\(\mu\)m)** \\ \end{tabular} & \
\begin{tabular}{c} **Standard** \\ **Deviation** **Rz (\(\mu\)m)** \\ \end{tabular} &
\begin{tabular}{c} **Standard** \\ **Deviation** **Rz (\(\mu\)m)** \\ \end{tabular} \\ \hline
0 &
\begin{tabular}{c} Hardox 400 \\ Pucest \\ \end{tabular} & 1.5 & 7 & 9 & 0.21 & 0.35 & 0.71 \\
0 &
\begin{tabular}{c} Pucest \\ \end{tabular} & 1.2 & 6.5 & 8 & N/A * & N/A & N/A \\ \hline
2 &
\begin{tabular}{c} Pucest \\ \end{tabular} & 1.8 & 8 & 10.5 & N/A & N/A & N/A \\ \hline
5 &
\begin{tabular}{c} Hardox 400 \\ Pucest \\ \end{tabular} & 3.5 & 12 & 16 & 0.35 & 0.35 & 0.71 \\
5 &
\begin{tabular}{c} Pucest \\ \end{tabular} & 3 & 11.5 & 15 & N/A & N/A & N/A \\ \hline \hline \end{tabular}  
* N/A insufficient number of measurements.  
\end{table} 
Table 8: Evolution of roughness and its standard deviation for the Komatsu HB365 excavator bucket tooth. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Load (N)** & **Parameter** & **Average Value (\(\mu\)m)** & **Standard Deviation (\(\mu\)m)** & **Standard Deviation Range (\(\mu\)m)** \\ \hline
0 & Ra & 1.5 & 0.21 & 1.29–1.71 \\
0 & Rt & 7 & 0.35 & 6.65–7.35 \\
0 & Rz & 9 & 0.71 & 8.29–9.71 \\ \hline
2 & Ra & 2 & 0.14 & 1.86–2.14 \\
2 & Rt & 8.5 & 0.35 & 8.15–8.85 \\
2 & Rz & 11 & 0.35 & 10.65–11.35 \\ \hline
5 & Ra & 3.5 & 0.35 & 3.15–3.85 \\
5 & Rt & 12 & 0.35 & 11.65–12.35 \\
5 & Rz & 16 & 0.71 & 15.29–16.71 \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Standard Deviation of Ra, Rt, and Rz Parameters for Hardox 400 Material. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Load (N)** & **Cycles** & **Ra (\(\mu\)m)** & **Rt (\(\mu\)m)** & **Rz (\(\mu\)m)** & \begin{tabular}{c} **Standard Deviation** \\ **Ra (\(\mu\)m)** \\ \end{tabular}  & \ \begin{tabular}{c} **Standard Deviation** \\ **Rt (\(\mu\)m)** \\ \end{tabular}  & \begin{tabular}{c} **Standard Deviation** \\ **Rz (\(\mu\)m)** \\ \end{tabular}  \\ \hline
0 & 500 & 1.1 & 6 & 7.5 & 0.35 & 0.95 & 1.35 \\
0 & 1000 & 1.4 & 6.8 & 8.8 & & & \\
0 & 1500 & 1.7 & 7.5 & 9.9 & & & \\
0 & 2000 & 1.9 & 8.2 & 10.7 & & & \\ \hline
2 & 500 & 1.7 & 7.8 & 10.2 & 0.35 & 0.95 & 1.35 \\
2 & 1000 & 2 & 8.8 & 11.8 & & & \\
2 & 1500 & 2.3 & 9.5 & 13 & & & \\
2 & 2000 & 2.6 & 10.2 & 13.8 & & & \\ \hline
5 & 500 & 2.4 & 9.8 & 13.2 & 0.65 & 2.38 & 2.98 \\
5 & 1000 & 2.9 & 11.2 & 14.8 & & & \\
5 & 1500 & 3.4 & 12.5 The analysis of data obtained from the graphs displaying surface roughness variation as a function of load, alongside the numerical values, reveals a clear and direct correlation between the applied force and the surface textural characteristics. As the load increases, we observe a general trend of increasing values for all three studied roughness parameters--Ra, Rt, and Rz.