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Table 14 Comparison of the calculated buckling loads of ASTER VM22 and VM-22 shells

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

Shell name d/h r (mm) \(\frac{\Lambda _{E}}{P_{E}}\) \(\frac{\Lambda _{NL}}{P_{E}}\) \(\frac{\Lambda _{NLP}}{P_{E}}\)
External pressure
 VM 22 15.47 20 3.35 7.5 4.47
 VM -22 15.47 20 4.96 3.5 4.6
 VM -22 22.7 30 7.19 5.9 4.15
Shell name d/h r (mm) \(\frac{\Lambda _{E}}{PF_{E}}\) \(\frac{\Lambda _{NL}}{PF_{E}}\) \(\frac{\Lambda _{NLP}}{PF_{E}}\)
50 % external pressure 50 % axial compression
 VM 22 15.47 20 1.22 1.43 0.97
 VM -22 15.47 20 1.25 1.03 0.76
 VM -22 22.7 30 2.12 1.53 0.90
Shell name d/h r (mm) \(\frac{\Lambda _{E}}{F_{E}}\) \(\frac{\Lambda _{NL}}{F_{E}}\) \(\frac{\Lambda _{NLP}}{F_{E}}\)
Axial compression
 VM 22 15.47 20 1.48 1.19 0.92
 VM -22 15.47 20 1.13 0.95 0.77
 VM -22 22.7 30 1.79 1.48 1.15