Post-buckling — Cylinder Mode1
BucklingPASS · 0.11%Bifurcation, imperfection sensitivity, and post-buckling path verification. Checks: single-mode imperfection sensitivity.
- Tolerance:
- 5%
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Open & Solve in BrowserProblem statement
- Geometry
- Abaqus thin cylindrical shell benchmark with out-of-roundness 0.5t and mode 1 imperfection.
- Material
- Constitutive or analytical definition: Published converged vendor benchmark target.
- Boundary conditions
- Required solver capability: shell_riks_and_imperfections. Use the loading/path control stated in the setup and preserve the complete response history.
- Measured quantity
- First nonlinear limit load is 0.902 times the linear eigenvalue buckling load.
WebCAE Terminal
Paste these commands into the Terminal panel inside WebCAE. They use the same text DSL as the application; run one command per line:
units mm
material E=200000 nu=0.3 density=7850
sketch points=0,0,0,1000,0,0,1000,500,0,0,500,0 as=face
section shell t=1
mesh shell size=25 element=quad pattern=structured
fix edge number 5
load edge number 3 fx=-1000
solve buckling nmodes=3
imperfection mode=1 scale=0.5
solve static nlgeom=on method=arc steps=20 maxiter=30 tol=1e-5Results comparison
| Reference value | 0.902 (нормализованное отношение предельной нагрузки к критической λ_lim/λ_cr) |
| Our result | 0.901 |
| Deviation | 0.11% |
| Tolerance | 5% |
| Status | PASS · 0.11% |
| Element family | Shell element |
| Mesh details | Цилиндрическая оболочка R/t=500, R=500 mm, L=1000 mm, t=1 mm (MITC4 квады, 800 elements, 820 nodes); Crisfield arc-length webcae_solve |
Updated: 2026-10-27 · version not recorded