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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