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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Table 3. Von-Mises stress results. Material Type Mesh Element Size (mm)

Element numbers Von-Mises Stress - Max (MPa)

Von-Mises Stress - Min (MPa)

8 6 4 8 6 4 8 6 4

2709 6384

197.26 214.15 249.87 232.83 254.73 286.82 276.1 303.31 386.42

7.6139x10 -4 2.2676x10 -4 44.506x10 -4 11.808x10 -4 8.7587x10 -4 13.296x10 -4 12.638x10 -4 7.4971x10 -4 16.278x10 -4

SS400

20357 2709 6384 20357 2709 6384 20357

SS490

SS540

The stress-strain curve relationship can be seen in Figs. 4 and 5. The materials began to yield for each mesh size element and material type at a specific load, and plastic deformations occurred. The mechanical properties of materials are essential to evaluate their performance and reliability under stress. In this regard, the study of the stress-strain behavior and failure strain of various materials is of great interest (Prabowo et al., 2020b). As shown in Fig. 4, the SS540 material exhibits the highest maximum stress of 563 MPa, followed by SS490 at 401 MPa, and SS400 at 344 MPa. These results indicate that the SS540 material can withstand the highest level of stress among the three materials. However, the failure strain of the materials is also an important parameter that affects the damage model, such as structure and energy absorption (Prabowo et al., 2020b). The results show that the failure strain of SS540 is the least at 0.0609, followed by SS400 at 0.068 and SS490 at 0.084, indicating that the SS490 material has the highest failure strain among the three materials.

Fig. 4. Stress-strain curve structural steel with element meshes size 4 mm.

Figure 5 shows the results of the maximum stress produced by SS490 varies with mesh size. At a mesh size of 4 mm, the maximum stress is 401 MPa, whereas 390 MPa is produced by 6 mm mesh size, and 376 MPa is produced by 8 mm mesh size. Additionally, the failure strain of SS490 also differs with mesh size, with the smallest mesh size having the highest failure strain at 0.084, followed by 6 mm mesh size at 0.072, and the largest mesh size at 0.06. Therefore, it is crucial to study the mechanical properties of materials in detail to ensure their reliability and performance in various applications, especially for components subjected to the failure criteria (Carvalho et al., 2023).