PSI - Issue 59

Ilham Bagus Wiranto et al. / Procedia Structural Integrity 59 (2024) 230–237 Wiranto et al. / Structural Integrity Procedia 00 (2019) 000 – 000

234

5

G 23 (GPa)

1.3788 1194.3 0.14623

Density (kg/m 3 )

Thermal conductivity (J/m.s.c)

Hashin criteria X t (MPa)

219.3

Y t (MPa) X c (MPa) Y c (MPa) X s (MPa) Y s (MPa)

18.6721 99.1759 77.09538

27.15

27.1524

3.2. Mesh convergence analysis A mesh convergence study was done before the main study by varying the model's mesh sizes to choose the right mesh size. In this analysis, the boundary condition was pinned at the half part of the stiffener. The mesh was also varied using uniform mesh for the whole model and a model with fine mesh in the contact area (2x smaller than the outer area), which can be seen in Table 3. The mass utilized in convergence studies was 20 kg to save computation time. The mesh convergence analysis results are shown in Figure 2. A number of elements, solve time, and displacement were then plotted. The total amount of solve time rises as the number of elements increases. At some point, adding additional elements lengthens the solve time without improving the result. Beyond this stage, refinement is an ineffective use in this simulation. In conclusion, a mesh size of 10 mm was chosen for the main analysis due to its time effectiveness, as shown in Figure 3.

Table 3. Mesh variation in mesh convergence study. Mesh Size (mm) Number of Elements

Displacement (mm)

Solve Time (second)

Uniform 25 Fine Mesh 20-40 Uniform 20 Fine Mesh 15-30 Uniform 15 Fine Mesh 10-20 Uniform 10 Fine Mesh 5-10 Uniform 5

320 371 520 571 952

12.1128 14.2755 14.7754 15.2598 14.8573 16.494 16.1138 16.2081 16.245

44 71 69

106 194 380 462

1367 2000 4990 8000

2180 3005

Fig. 3. Detail of mesh size 10 x 10mm with 2000 elements.

Fig. 2. Mesh convergence study.