Applicability of the Vibration Correlation Technique for Estimation of the Buckling Load in Axial Compression of Cylindrical Isotropic Shells with and without Circular Cutouts

Table 3

Experimental buckling loads and mode shapes of shells with cutouts.

Cylinder	Experimental buckling load [kN]	Experimental buckling mode
R33; = 50 mm	25.85; (21.2)
R35; = 80 mm	25.05; (21.5)
R36; = 30 mm	25.39
R37; = 30 mm; 20 mm wide ring	43.79
R38; = 80 mm; 20 mm wide ring	30.9; (29.1)
R39; = 80 mm; 10 mm wide ring	28.12; (27.7)

at the onset of local buckling.