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Table 17 The calculated elastic-plastic buckling load under external pressure for the 45° cone

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

Overall β COQMULT   QUA8   Plasticity ratio
thickness   P crit plast P crit plast P E P crit plast P crit plast P E QUA8 /
(mm)   (MPa)   (MPa)   COQMULT
3 0.0001 0.0063 1.0 0.00501 1.01 0.79
3 0.01 0.0063 1.0 0.00634 1. 1.0
3 1. 0.00898 1.27 0.00715 1. 0.8
11 0.0001 0.068 1.0 0.0134 0.47 0.20
11 0.01 0.069 1.0 0.068 1. 0.98
11 1. 0.212 1.13 0.188 1. 0.89
51 0.0001 0.144 0.175 0.0159 0.10 0.11
51 0.01 0.178 0.195 0.154 0.18 0.97
51 1. 9.21 0.382 2.66 0.294 0.76