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Table 6 The calculated buckling pressures and modes for the 3 cone angles and the 3 models: Shell, QUA8 with the standard free surface ("ORTHO") and QUA8 with the horizontal free surface ("HORI")

From: Modeling elastic-plastic buckling of sandwich axisymmetric shells: on the limits of "shell" models and analytical solutions

Angle

COQMULT

Mode

Standard QUA8

Mode

Horizontal QUA8

Mode

°

(MPa)

 

(MPa)

 

(MPa)

 

30

7.34

4

7.28

4

1.15

5

45

9.21

4

9.06

4

3.607

5

60

7.83

4

8.08

4

5.529

4