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Table 7 Imperfect 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
\(\frac{P_{exp}}{P_{NLP}}\) 0.991 0.920 0.900 0.982
\(\frac{P_{exp}}{P_{NLPCOMU}} ; \frac{\delta }{h}=0.01\) 0.986 0.879 0.920 1.00
\(\frac{P_{exp}}{P_{NLPCOMU}} ; \frac{\delta }{h}=0.1\) 1.06 0.937 0.985 1.069
\(\frac{P_{exp}}{P_{NLPCOMU}} ; \frac{\delta }{h}=0.2\) 1.15 0.994 1.04 1.129
Axial compression A5 A6
\(\frac{F_{exp}}{P_{NLP}}\) 1.01 0.919
\(\frac{F_{exp}}{F_{NLPCOMU}} ; \frac{\delta }{h}=0.01\) 1.076 0.922
\(\frac{F_{exp}}{F_{NLPCOMU}} ; \frac{\delta }{h}=0.1\) 1.080 0.988
\(\frac{F_{exp}}{F_{NLPCOMU}} ; \frac{\delta }{h}=0.2\) 1.087 0.996