Add dataset card

README.md

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+---
+license: mit
+task_categories:
+  - image-to-image
+tags:
+  - FEA
+  - finite-element-analysis
+  - stress
+  - strain
+  - geometry
+  - simulation
+size_categories:
+  - 10K<n<100K
+---
+
+# Geometry → Stress/Strain FEA Dataset
+
+Side-by-side PNG images: **left half** = geometry input, **right half** = FEA stress/strain field.
+
+## Subdatasets
+
+| Name | Train | Test | Description |
+|---|---|---|---|
+| BC_scale | 3200 | 800 | Boundary-condition scaled geometries |
+| HEXAGON | 1600 | 400 | Hexagonal lattice geometries |
+| MISES | 1600 | 400 | Von Mises stress field |
+| PE11_0.2 | 1600 | 400 | Plastic strain PE11 |
+| PE12 | 1600 | 400 | Plastic strain PE12 |
+| S11 | 1600 | 400 | Normal stress S11 |
+| S12 | 1600 | 400 | Shear stress S12 |
+| STITCH_GEO_MISES | 1600 | 400 | Stitched geometry-MISES pairs |
+| TRIANGLE | 1600 | 400 | Triangular geometry |
+| FIELD2GEO | 1600 | 400 | Field-to-geometry mapping |
+
+**Total: 17,600 train · 4,400 test · 47,001 images · ~8.5 GB**
+
+## Image format
+Each PNG is `1024 × 512` px:
+- Left 512×512 — geometry/mesh (model input)
+- Right 512×512 — stress/strain colormap (model target)