Figure 1.
Cylinder geometry properties and dent shape
Table 1.
Material Properties [12]
| Material | Yield stresses (MPa) | Tangent Modulus (MPa) | Young's modulus (MPa) | Poisson's ratio |
|---|---|---|---|---|
| Cylinder sheet | 198.8 | 1450 | 210 000 | 0.29 |
Table 2.
Comparison with buckling pressure of the cylindrical shell given in Combescure and Gusic [27] and Rathinam and Prabu [13]
| Cylindrical shell | R (mm) | L (mm) | t (mm) | Young's modulus (GPa) | Poisson's ratio (γ) | FE eigen buckling pressure (MPa) | ||
|---|---|---|---|---|---|---|---|---|
| Combescure and Gusic | Rathinam and Prabu | From present analysis | ||||||
| A | 50 | 20 | 0.15 | 200 | 0.3 | 0.2936 | 0.2927 | 0.2985 |
Table 3.
Comparison with buckling pressure of the cylindrical shell given in Windernburg and Trilling [28] and Rathinam and Prabu [13]
| Cylindrical shell | R (mm) | L (mm) | t (mm) | Young's modulus (GPa) | Poisson's ratio (γ) | FE eigen buckling pressure (MPa) | ||
|---|---|---|---|---|---|---|---|---|
| Windernburg and Trilling | Rathinamn and Prabu | From present analysis | ||||||
| 53 | 203.2 | 406.4 | 0.8 | 193 | 0.3 | 0.096 (8) | 0.108 (8) | 0.111 (8) |
Figure 2.
(a) First eigen buckling mode shape in the isometric view of the model A given in Combescure and Gusic [27]. (b) First eigen buckling mode shape in the isometric view of model 53 given in Windernburg and Trilling [28]
Figure 3.
Boundary condition
Figure 4.
Perfect Model (M37), a) Total deformation b) Maximum principal strains c) Von Mises stress d) Waveform
Figure 5.
Perfect model (M37) results
Figure 6.
0°-angle dent group results
Figure 7.
45°-angle dent group results
Figure 8.
90°– angle dent group results
Figure 9.
<-< and <-> dent shape group results
Figure 10.
Comparison of critical buckling pressure values according to theory and codes
Figure 11.
Effect of dent shape on buckling performance compared to the perfect model