## 3 Results and Discussion  
A realistic full-scale 3D model of the sample cura baglama was successfully created and the geometrical dimensions of the instrument was revealed. The 3D model was utilised for the deformation simulation in this study. After the simulation-solving process, numerical and visual outputs were obtained, and the results were recorded. The simulation visually demonstrated the deformation behaviour of the instrument under pre-defined string tension forces, and numerical results of the stress and deformation distribution, contact details, and reaction forces for related components were extracted. The string tension forces were seen to increase from the B2 (Si) tune to the D3 (Re) tune. Maximum string tension force was seen in the D3 (Re) tune setting (S3 = S4: 46.765 N). Corresponding resultant string forces affecting the bridge component were calculated as 12.89 N, 14.52 N, and 18.29 N for the adjusted end tunes of B2 (Si), D3 (Re), and C3 (Do), respectively (Figure 3). In a linear perspective, increases in the instrument deformation and related stress values on the components from the B2 (Si) tune to the D3 (Re) tune settling would be expected. This situation was confirmed and clearly exhibited by the simulation results. Accordingly, maximum equivalent stress magnitudes of 12.883 MPa, 14.545 MPa, and 18.325 MPa were calculated on the bridge component for the adjusted end tunes of B2 (Si), D3 (Re), and C3 (Do), respectively. The maximum deformation values were calculated on the soundboard component as 0.159 mm, 0.178 mm, and 0.223 mm for the adjusted end tunes of B2 (Si), D3 (Re), and C3 (Do), respectively. The maximum equivalent stress value on the soundboard was 3.111 MPa. Visual outputs of the simulation are given in Figure 5.  
Figure 4: Details of the finite element model (mesh structure). \begin{table}
\begin{tabular}{c c c c c c c c} \hline  & & \begin{tabular}{c} **Corresponding** \\ **String Tension** \\ **Runing** \\ **(End Tune)** \\ \end{tabular} & \begin{tabular}{c} **Tension Force** \\ **Strings** \\ \end{tabular} & \begin{tabular}{c} **Resultant** \\ **Eroce** \\ **Bridge** \\ \end{tabular} & \begin{tabular}{c} **Total** \\ **Tension Force** \\ **Single String** \\ \end{tabular} & \
\begin{tabular}{c} **Resultant** \\ **Tension Force** \\ **on the Bridge** \\ \end{tabular} &
\begin{tabular}{c} **Resultant** \\ **Tension Force** \\ **Angle on the Bridge** \\ **Bridge** \\ \end{tabular} \\ \cline{3-8}  & & **(N)** & **(N)** & **(N)** & **(N)** & **(N)** & **(\({}^{\circ}\))** \\ \hline B2 (SI) & S1 = S2 & 30.194 & 0.069 & 2.233 & 2.234 & & \\ B2 (SI) & S3 = S4 & 32.831 & 0.075 & 2.428 & 2.429 & 12.89 & 1.77 \\ B2 (I23.5 Hz) & S5 = S6 & 24.092 & 0.055 & 1.782 & 1.782 & & \\ C3 (DO) & S1 = S2 & 34.032 & 0.078 & 2.517 & 2.518 & & \\ C3 (10.8 Hz) & S3 = S4 & 37.112 & 0.085 & 2.744 & 2.746 & 14.52 & 1.77 \\ C3 (130.8 Hz) & S5 = S6 & 26.975 & 0.062 & 1.995 & 1.996 & & \\ \hline D3 (RE) & S1 = S2 & 42.843 & 0.098 & 3.168 & 3.170 & & \\ D3 (I46.8 Hz) & S3 = S4 & 46.765 & 0.107 & 3.458 & 3.460 & 18.29 & 1.77 \\ C3 (I46.8 Hz) & S5 = S6 & 34.003 & 0.078 & 2.515 & 2.516 & & \\ \hline \end{tabular}
\end{table} 
Table 3: Calculated string forces acting on the bridge. In string instruments, most especially, soundboard deformation under string tension affects the sound occurrence and quality. Structural deformation can disrupt the instrument's inherent resonance and vibrational patterns and it can lead to unintended buzzing, rattling, or other undesirable noises when playing. This can occur when the strings come into contact with frets, bridges, or other parts of the instrument due to changes in the instrument's geometry; however, specific to this study, it was interpreted that the deformation magnitudes on the soundboard did not negatively affect the sound quality and tune regulations, which was confirmed by frequency outputs and performer feedback.