PSI - Issue 59

Alfiy Alfatarizqi et al. / Procedia Structural Integrity 59 (2024) 420 – 427 A. Alfatarizqi et al. / Structural Integrity Procedia 00 (2024) 000 – 000

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Fig. 2. Buckling Pressure Result Axial Force Abaqus FE.

The data obtained from Abaqus FE testing indicates an average test result of approximately 0.89, representing the central value. However, there is a considerable standard deviation (STDEV) of 0.27, signifying significant variation in the test results. The coefficient of variation (COV) has a relatively high value of 0.30, indicating considerable variability in the test data compared to the average. In summary, the data suggests an average test result of 0.89 with notable variation, implying potential variability in the testing process or the tested system. 5.2. Single loading (External Pressure) The buckling pressure data presented in Table 5 were subjected to numerical testing and benchmarking using Abaqus Finite Element (FE) analysis. The numerical results are depicted in Figure 3.

Table 5. Test results for external pressure.

Experiment [MPa]

Numeric [MPa]

Venstel Krauthaer [MPa]

Venstel Windenburg [MPa]

NASA [MPa]

Von Mises [MPa]

Reference

Model

Ratio

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[4]/[3]

SL1 SL2 SL3

4.69 4.70 5.39 2.33 1.93 1.79 1.82

4.76 4.84 4.83 1.81 1.67 1.61 1.25

4.62 4.69 4.68 1.84 1.63 1.44 1.41

4.75 4.83 4.82 1.87 1.66 1.46 1.42

4.65 4.72 4.71 1.85 1.64 1.45 1.42

5.23 5.32 5.30 2.08 1.85 1.63 1.60

1.02 1.03 0.90 0.78 0.87 0.90 0.69 0.88 0.12 0.14

(Zhang et al., 2021)

C1-A C2-A C3-A C5-A

(Muttaqie et al., 2020)

AVERAGE

STDEV

COV

(a)

(b)

Fig. 3. Buckling Pressure External Pressure Result Abaqus FE (a) SL1 – SL3, (b) C1-A – C3A, and C5-A.