Table 5: Summary of numerical analysis for cylindrical shells including an elliptical cutout with constant height and different height.

Model designationShell lengthCutout size ( )Buckling load ( )

R400-θ90-L300-L0150-α70-Perfect3002535
R400-θ90-L300-L0150-α70- 300 1806
R400-θ90-L300-L0150-α70- 300 1611
R400-θ90-L300-L0150-α70- 300 1446
R400-θ90-L300-L0150-α70- 300 1286
R400-θ90-L300-L0150-α70- 300 1140
R400-θ90-L500-L0150-α70-Perfect5002103
R400-θ90-L500-L0150-α70- 500 1622
R400-θ90-L500-L0150-α70- 500 1425
R400-θ90-L500-L0150-α70- 500 1262
R400-θ90-L500-L0150-α70- 500 1141
R400-θ90-L500-L0150-α70- 500 995
R400-θ90-L700-L0150-α70-Perfect7002004
R400-θ90-L700-L0150-α70- 700 1579
R400-θ90-L700-L0150-α70- 700 1367
R400-θ90-L700-L0150-α70- 700 1182
R400-θ90-L700-L0150-α70- 700 1056
R400-θ90-L700-L0150-α70- 700 926
R1000-θ90-L300-L0150-α70-Perfect3003489
R1000-θ90-L300-L0150-α70- 300 2625
R1000-θ90-L300-L0150-α70- 300 2418
R1000-θ90-L300-L0150-α70- 300 2281
R1000-θ90-L300-L0150-α70- 300 2189
R1000-θ90-L300-L0150-α70- 300 2112
R1000-θ90-L500-L0150-α70-Perfect5002371
R1000-θ90-L500-L0150-α70- 500 2158
R1000-θ90-L500-L0150-α70- 500 1950
R1000-θ90-L500-L0150-α70- 500 1814
R1000-θ90-L500-L0150-α70- 500 1699
R1000-θ90-L500-L0150-α70- 500 1607
R1000-θ90-L700-L0150-α70-Perfect7002104
R1000-θ90-L700-L0150-α70- 700 1974
R1000-θ90-L700-L0150-α70- 700 1783
R1000-θ90-L700-L0150-α70- 700 1630
R1000-θ90-L700-L0150-α70- 700 1508
R1000-θ90-L700-L0150-α70- 700 1401