Table 3. Mechanical parameters and results of the buckling analysis.

Nomenclature	Dimension	Case 10	Case 10/rings	Case 30	Case 30/rings
Axial stiffness (fiu)	[N/mm]	0.103	0.14379	0.1673	0.20779
Bending stiffness (Cbg)	[N∙mm2]	245.632	342.836	398.974	495.5337
Theoretical buckling pressure (Pc,theo)	[kPa]	2.3793	3.321	3.8645	4.80
Experimental buckling pressure (Pc,exp)	[kPa]	2.482	3.309	3.760	4.891
Error rate (e)	[%]	1.63	0.367	2.788	1.859