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Table 6 Perfect cylinders: experimental and calculated buckling loads

From: ASTER Shell: a simple concept to significantly increase the plastic buckling strength of short cylinders subjected to combined external pressure and axial compression

External pressure A1 A2 A3 A4
\(P_{exp}\) 0.021 0.019 0.020 0.0223
Fourier mode \(n_{exp}\) 11 10 11 11
\(\frac{P_{exp}}{P_{E}}\) 0.986 0.931 0.900 0.982
Fourier mode \(n_{E}\) 11 11 11 11
\(\frac{P_{exp}}{P_{NL}}\) 0.991 0.920 0.900 0.982
\(\frac{P_{exp}}{P_{NLP}}\) 0.991 0.920 0.900 0.982
Axial compression A5 A6
\(F_{exp}\) 11,000 9275
Fourier mode \(n_{exp}\) 11 12
\(\frac{F_{exp}}{F_{E}}\) 0.775 0.707
Fourier mode \(n_{E}\) 2–15 2–15
\(\frac{F_{exp}}{F_{NL}}\) 0.648 0.708
\(\frac{F_{exp}}{P_{NLP}}\) 1.01 0.919