PSI - Issue 48

Arifin Nurcholis et al. / Procedia Structural Integrity 48 (2023) 33 – 40 Nurcholis et al. / Structural Integrity Procedia 00 (2023) 000–000

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In Figures 8 and 9 of the ABAQUS Dynamic Explicit benchmarking during the heating process, the structure experiences thermal expansion. The maximum axial force value is 118.027 kN towards the negative X axis. A uniform load of 4250 N/m also influences this in the negative Y-axis direction. The deformation in the structure is also proportional to the temperature rise that occurs in the structure, with a maximum value of 64.229 mm towards the negative Y axis. During the cooling process, the structure undergoes normalization until the deformation value is 0 mm, and the axial force value also increases due to this normalization. 4.2. Mesh convergence study Mesh convergence studies determine the appropriate configuration when performing numerical analysis. This stage will affect the results of numerical analysis, so this step is essential so that the results obtained are maximized and the time needed for numerical analysis is short. In this paper, a convergence mesh study is carried out by varying the size of the seed mesh from 5 mm to 50 mm. Based on the results in Figure 10, it can be seen that the mesh size is proportional to the maximum value of the axial forces. Mesh sizes with a range of 5 to 10 mm have a difference in the value of 0.6%. This difference is minimal, and there is no significant increase in the maximum axial force value. In the mesh size range of 10 to 15 mm, there is a difference in the maximum axial force value of 1.27%. In the 15 to 20 mm range, there is a difference in the maximum axial force value of 1.71%. In the range of 20 to 25 mm, there is a difference in the maximum axial force value of 2.16%. In the range of 25 to 30 mm, the difference in maximum axial force values ​ ​ is 2.2%. In the 30 and 35-mm fields, mesh sizes have the same value because the number of elements is the same. Nevertheless, when compared with a 5 mm mesh. The difference in the value of the maximum axial force is 7.76%. The 35 to 40 mm range has a different maximum axial force value of 4.64%. In the mesh size range of 40 to 45, the maximum axial force value difference is 3.85%. Also, there is very little difference in value in the mesh size range of 45 to 50 mm. However, compared to the 5 mm mesh size, the maximum axial force value is 15.418%. Therefore, this paper uses a mesh size of 10 mm because the error value is below 1% compared to the smallest mesh size.

Figure 10. Mesh convergence result: based on the maximum axial force