Table 4: Summary of numerical analysis for cylindrical shells including an elliptical cutout with constant width and different height.

Model designationShell lengthCutout size ( )Buckling load ( )

R400-θ90-L300-L0150-α70-Perfect3002535
R400-θ90-L300-L0150-α70- 300 1397
R400-θ90-L300-L0150-α70- 300 1314
R400-θ90-L300-L0150-α70- 300 1201
R400-θ90-L300-L0150-α70- 300 1094
R400-θ90-L300-L0150-α70- 300 1000
R400-θ90-L500-L0150-α70-Perfect5002103
R400-θ90-L500-L0150-α70- 500 1224
R400-θ90-L500-L0150-α70- 500 1139
R400-θ90-L500-L0150-α70- 500 1030
R400-θ90-L500-L0150-α70- 500 930
R400-θ90-L500-L0150-α70- 500 847
R400-θ90-L700-L0150-α70-Perfect7002004
R400-θ90-L700-L0150-α70- 700 1170
R400-θ90-L700-L0150-α70- 700 1064
R400-θ90-L700-L0150-α70- 700 960
R400-θ90-L700-L0150-α70- 700 860
R400-θ90-L700-L0150-α70- 700 750
R1000-θ90-L300-L0150-α70-Perfect3003489
R1000-θ90-L300-L0150-α70- 300 2366
R1000-θ90-L300-L0150-α70- 300 2300
R1000-θ90-L300-L0150-α70- 300 2216
R1000-θ90-L300-L0150-α70- 300 2125
R1000-θ90-L300-L0150-α70- 300 2014
R1000-θ90-L500-L0150-α70-Perfect5002371
R1000-θ90-L500-L0150-α70- 500 1900
R1000-θ90-L500-L0150-α70- 500 1829
R1000-θ90-L500-L0150-α70- 500 1730
R1000-θ90-L500-L0150-α70- 500 1640
R1000-θ90-L500-L0150-α70- 500 1520
R1000-θ90-L700-L0150-α70-Perfect7002104
R1000-θ90-L700-L0150-α70- 700 1720
R1000-θ90-L700-L0150-α70- 700 1610
R1000-θ90-L700-L0150-α70- 700 1520
R1000-θ90-L700-L0150-α70- 700 1420
R1000-θ90-L700-L0150-α70- 700 1300