PSI - Issue 59

B. Ganendra et al. / Procedia Structural Integrity 59 (2024) 238–245 Ganendra et al. / Structural Integrity Procedia 00 (2019) 000 – 000

243

6

0,2 0,4 0,6 0,8 1 1,2 1,4

0,2 0,4 0,6 0,8 1 1,2 1,4

Pnum / Pexp

Pnum / Pexp

0 2 4 6 8 10 12

0

2

4

6

8 10 12

Mesh size / thickness

Mesh size / thickness

(b)

(a)

0,2 0,4 0,6 0,8 1 1,2 1,4

0,2 0,4 0,6 0,8 1 1,2 1,4

Pnum / Pexp

Pnum / Pexp

0

2

4

6

8 10 12

0

5

10

15

Mesh size / thickness

Mesh size / thickness

(d)

(c)

Fig. 4. Comparison between numerical and experimental result in different mesh size for D/t ratio: (a) 75, (b) 100, (c) 125, and (d) 150.

4.2. Final Deformation Shape Besides investigating the correlation between ultimate load and mesh size, present study is also investigating the influence of mesh size on the final deformation shape of the steel cylindrical shell model. The final deformation shape of each model are shown in Figure 5.

(a)

(b)

(c)

(d)

Fig. 5. Final deformation shape of model DT75 with mesh size (a) 20 mm, (b) 10 mm, (c) 5 mm, and (d) 2.5 mm.