PSI - Issue 48

Cakram Yudhifa Ganda Satriawan et al. / Procedia Structural Integrity 48 (2023) 50–57 Satriawan et.al./ Structural Integrity Procedia 00 (2023) 000–000

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Fig. 5. Stress-strain curve material type SS490.

5. Effect of Mesh Size In the finite element method, the accuracy of the result obtained is determined by the mesh size of the element. A smaller mesh size yields higher accuracy than a larger one. This is because a smaller mesh size element can better represent the geometry of the structure, leading to more accurate results. However, it is important to note that a smaller mesh size also leads to an increase in computational time and complexity (Fajri et al., 2021; Prabowo and Sohn, 2019; Dutt, 2015). As the mesh size decreases, the number of elements in the model increases, leading to an increase in the modal complexity (Dutt, 2015). When analyzing the Von-Mises stress of structural steel grade SS490 with mesh size element, Fig. 6 shows that the choice of mesh size has a significant impact on the stress results. An 8 mm mesh size produces the Von-Mises stress at its peak at 370 MPa, while the 6 mm and 4 mm mesh sizes produce the Von-Mises stress at their peaks at 390 MPa and 400 MPa, respectively. This emphasizes the importance of carefully choosing the appropriate mesh size for each analysis to obtain accurate and reliable results. A mesh size that is too large can lead to inaccurate stress results, while a mesh size that is too small can lead to an unnecessary increase in computational time and complexity.

Fig. 6. Von-Mises stress of structural steel grade SS490 with mesh size element.