Datasets:
File size: 4,198 Bytes
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"license": "ODC-By v1.0",
"license_url": "https://opendatacommons.org/licenses/by/1-0/",
"dataset": "DeepJEB++ TRELLIS-generated jet-engine bracket surface-FEA dataset",
"version": "1.0",
"date": "2026-06-07",
"n_cases": 15360,
"case_id_format": "<base>-<sub>-diag_xz_mm_IS<aug> (shared by mesh / field / BC / label row)",
"units": {
"length": "mm",
"displacement": "mm",
"force": "N",
"moment": "N*mm",
"stress": "MPa",
"mass": "g",
"volume": "mm^3"
},
"material": {
"name": "Ti-6Al-4V",
"model": "linear isotropic elasticity (static)",
"youngs_modulus_MPa": 113800.0,
"poisson_ratio": 0.342,
"density_g_per_mm3": 0.00443
},
"load_cases": [
{
"name": "ver",
"type": "force",
"direction": [
0.0,
0.0,
1.0
],
"magnitude": 35600.0,
"unit": "N"
},
{
"name": "hor",
"type": "force",
"direction": [
-1.0,
0.0,
0.0
],
"magnitude": 37800.0,
"unit": "N"
},
{
"name": "dia",
"type": "force",
"direction": [
-0.669,
0.0,
0.743
],
"magnitude": 42300.0,
"unit": "N"
},
{
"name": "tor",
"type": "moment",
"direction": [
0.0,
1.0,
0.0
],
"magnitude": 565000.0,
"unit": "N*mm"
}
],
"boundary_conditions": {
"dirichlet": "4 bolt holes clamped (u = 0)",
"neumann": "total traction applied on the lug/clevis bore, shared equally over lug nodes",
"interface_detection": "deterministic 4-bolt + loaded-clevis detection (paper 3.4.1), Umeyama-registered to the GT frame",
"index_frame": "all BC node indices reference fields/<case>.npz surface_points (25k FEM mesh, ~24.9k verts), NOT the native 50k .obj"
},
"mesh": {
"native_surface": "meshes ~50k verts (.obj), source output_v2/_tri",
"fem_surface": "decimated to FEM_TARGET_VERTS=25000, pymeshfix-cleaned",
"volume": "tetgen tetrahedralization, switches pq1.2/10Y",
"note_robust_6": "6 complex cases (187-384-IS06, 217-136-IS09, 384-123-IS00, 384-136-IS18, 384-279-IS13, 384-548-IS08) used a robust decimation (pymeshfix-before-decimate) to avoid tetgen self-intersection; same 25k target."
},
"mass": {
"formula": "mass_g = density_g_per_mm3 * enclosed_volume_mm3",
"volume_source": "pymeshfix-watertight enclosed volume of the registered native ~50k mesh (full resolution; more accurate than the 25k FEM tet volume)",
"stats_g": {
"min": 83.6,
"median": 233.2,
"max": 1500.7
}
},
"layout": {
"1_surface_meshes/": "15,360 input surface meshes (.obj, native ~50k verts)",
"2_boundary_conditions/": "15,360 BC (.npz): bolt_idx, bolt_holes(0-3), lug_idx, n_surface, R, jaccard_bolt, frame",
"3_fea_fields/": "15,360 surface FEA fields (.npz): surface_points, surface_faces, R, cov_min, dXZ, and per load {ver,hor,dia,tor}_U, _vm, _maxu, _p95vm",
"deepjebpp_labels.csv": "per-case scalar labels (15,360 rows): case, mass_g, vol_mm3, cov_min, dXZ, R, {load}_maxu, {load}_p95vm, {load}_maxvm",
"metadata.json": "this file",
"README.txt": "human-readable spec"
},
"field_npz_keys": {
"surface_points": "(N,3) float32 mm",
"surface_faces": "(M,3) int32",
"R": "float lug bore radius mm",
"cov_min": "float lug-detection diagnostic",
"dXZ": "float lug-detection diagnostic",
"<load>_U": "(N,3) float32 surface displacement mm",
"<load>_vm": "(N,) float32 surface von Mises MPa",
"<load>_maxu": "float max displacement magnitude over volume mm",
"<load>_p95vm": "float 95th-percentile von Mises over volume nodes MPa"
},
"notes": {
"mass_vs_cad_validation": "The paper's 'R^2=0.9999 vs CAD' mass validation refers to the volume->mass pipeline checked against CAD reference masses (SimJEB GT, which has CAD). Generated TRELLIS brackets have no CAD counterpart, so that validation is not reproduced per-case here; the same deterministic volume pipeline is used.",
"all_at_25k": "All 15,360 field/BC entries are at the same 25k FEM mesh density (consistent labels)."
}
} |