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 5

Numerical buckling load prediction and VCT results for shells with cutouts.

Cylinder	Experimental; buckling load [kN]	Numerical predicted buckling load [kN] RBC/CBC	Deviation from experimental results [%] RBC/CBC	KDF; EXP/RBC/CBC	Predicted buckling load by VCT [kN]	Deviation from experimental results [%]
R36	25.39	31.22/36.92	18.69/31.25	0.38/0.47/0.55	29.81	−17.4
R33	25.85 (21.2)	28.80/36.88	10.22/29.90	0.39/0.43/0.55	—	—
R35	25.05 (21.5)	28.51/36.66	12.14/31.66	0.38/0.43/0.55	—	—
R37	43.79	47.42/49.41	7.64/11.37	0.66/0.71/0.74	41.59	5.0
R38	27.93(26.76)	31.48/35.10	11.26/20.43	0.42/0.47/0.53	—	—
R39	28.12 (27.2)	31.33/38.29	10.24/26.58	0.42/0.47/0.57	24.94	11.3

at the onset of local buckling.