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Table 13 The calculated relative internal buckling pressure for the 30° cone

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

Overall β COQMULT r cone-pint QUA8 Ratio
thickness   P cr P COQMULT E = 200000   P cr P QUA 8 E = 200000 QUA8/
(mm)      COQMULT
3 0.0001 0.82 0.801 0.26 0.31
3 0.001 0.82 0.801 0.54 0.67
3 0.01 0.82 0.803 0.79 0.96
3 0.1 0.83 0.823 0.83 1.00
3 1.0 1. 1.0 1. 1.00
11 0.0001 0.313 0.287 0.022 0.07
11 0.001 0.314 0.287 0.097 0.31
11 0.01 0.321 0.295 0.287 0.89
11 0.1 0.389 0.365 0.385 0.99
11 1.0 1. 1.0 1. 1.00
51 0.0001 0.068 0.067 0.0017 0.026
51 0.001 0.069 0.068 0.0072 0.10
51 0.01 0.078 0.077 0.044 0.57
51 0.1 0.160 0.0165 0.162 1.00
51 1.0 1. 1.0 1. 1.01