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Table 8 The calculated normalized external buckling pressure for the 60° cone

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

Overall β COQMULT r cone-pext Mode QUA8 Mode Ratio
thickness   P cr P COQMULT E = 200000    P cr P QUA 8 E = 200000   QUA8/
(mm)        COQMULT
3 0.0001 0.889 0.878 8 0.729 8 0.82
3 0.001 0.889 0.878 8 0.868 8 0.98
3 0.01 0.891 0.879 8 0.888 8 1.0
3 0.1 0.899 0.892 8 0.900 8 1.0
3 1.0 1. 1. 8 1.0 8 1.0
11 0.0001 0.366 0.360 5 0.176 7 0.49
11 0.001 0.366 0.361 5 0.325 5 0.91
11 0.01 0.376 0.367 5 0.358 5 0.98
11 0.1 0.443 0.411 5 0.429 5 0.99
11 1.0 1. 1. 6 1. 5 1.02
51 0.0001 0.097 0.087 3 0.022 6 0.24
51 0.001 0.098 0.088 3 0.072 4 0.76
51 0.01 0.11 0.097 3 0.101 4 0.95
51 0.1 0.196 0.183 4 0.187 4 0.99
51 1.0 1. 1. 4 1. 4 1.03