NAFEMS LE1
StaticPASS · 3.62%Elliptical membrane — stress concentration
- Tolerance:
- 5%
Problem statement
- Geometry
- Elliptical plate with an elliptical hole: outer semi-axes ≈ 3.25 and 2.75 m, hole semi-axes ≈ 2 and 1 m, thickness 0.1 m — per the standard NAFEMS LE1 setup.
- Material
- E = 210 GPa, ν = 0.3.
- Boundary conditions
- Uniform tensile pressure of 1 MPa on one outer edge; symmetry about both axes.
- Measured quantity
- Tangential stress σyy at point D, on the hole boundary along the minor axis.
Results comparison
| Reference value | 92.7 MPa |
| Our result | 89.35 MPa |
| Deviation | 3.62% |
| Tolerance | 5% |
| Status | PASS · 3.62% |
| Element family | Shell element |
| Mesh details | (MITC4, DKT+CST), quarter-symmetry elliptic-membrane model; σyy at point D on the hole boundary. Coarse shell mesh — refinement near D would reduce the 3.62% further. |
Updated: 2026-07-07 · WebCAE solver