| --- |
| license: mit |
| size_categories: [10K<n<100K] |
| --- |
| # OpenTO-NL |
|
|
| Finite-strain (geometrically nonlinear) topology optimization designs in the OpenTO scheme. |
|
|
| | column | type | meaning | |
| |---|---|---| |
| | `topology` | 1-bit image (nelx, nely) | the design, binary | |
| | `loads` | (n, 4) float32 | rows (c0, c1, fx, fy): node position in long-edge-normalized matrix coordinates and the PHYSICAL load vector | |
| | `boundary conditions` | (n, 4) float32 | rows (c0, c1, fix_x, fix_y) | |
| | `volume fraction` | float32 | target volume fraction | |
| | `aspect ratio` | float32 | nely / nelx | |
|
|
| Material: modified Saint Venant-Kirchhoff, plane strain, E = 1, nu = 0.3, unit elements, void at the SIMP |
| floor (E_min = 1e-6). Loads are absolute: the same structure at a larger load is a different, nonlinear problem. |
| Every design was checked with a finite-strain path-following solver and carries its applied load: a converged |
| equilibrium exists at the applied load and the design's limit load is at or above it. |
| Splits: `train` 84,667 samples, `test` 1,500 samples; the test boundary conditions (supports and load pattern) |
| do not occur in train at any volume fraction. |
| |
