PSI - Issue 81

Ahsan Anugrah Elbar et al. / Procedia Structural Integrity 81 (2026) 3–10

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deformation because the gradually varying load reduces stress concentration at the plate surface. The corresponding contour plots in Fig. 7 illustrate that the highest stress regions are located near the fixed supports. At the same time, the most significant displacement occurs around the plate’s central area. Further analysis for the 150% uniform load with pitting corrosion is presented in Table 5. Increasing the corrosion depth from 10% to 30% of the plate thickness resulted in a rapid increase in deflection, from 10.7 mm to 16 mm, and in maximum stress, from 71 MPa to 98.6 MPa. The contour plots in Fig. 8 illustrate localized stress concentration around the corroded regions, indicating reduced stiffness and the potential for failure initiation.

Table 4. Simulation results for uniform and triangular loads. Model

Uniform Load

Triangular Load

Deflection (mm)

Max. Stress (MPa)

Deflection (mm)

Max. Stress (MPa)

50 75

1.38 2.04 2.76 3.42 4.37

12.1 17.8 24.1 29.9 38.2

8.79e-8 6.47e-7 1.15e-6 1.8e-6 2.56e-6

8.03e-7 5.91e-6 1.05e-5 1.64e-5 2.36e-5

100 125 150

Table 5. Simulation result on 150% fill with pitting corrosion. Model

Deflection (mm)

Maximum Stress (MPa)

10% corrosion 20% corrosion 30% corrosion

10.7 12.4

71

89.9 98.6

16

a

Fig. 6. Contour results of the trash box at uniform load: (a) von Mises stress; and (b) displacement.

a

Fig. 7. Contour result of the trash box at triangular load: (a) von Mises stress; and (b) displacement.