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Table 15 Comparison of the estimated elastic-plastic buckling loads for the 51 mm-thick sphere under external pressure

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

β COQMULT   QUA8   
  P etan plast P incr max P etan plas P flow plas P incr max
  MPa MPa MPA MPa MPa
0.0001 0.802 0.803 0.018 0.555 0.56
0.01 1.0 1.07 0.98 1.02 1.42
1. 20.4 20.5 19.8 20.44 33.7