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"title": "Automotive Underbody Panel Impact Dataset",
"version": "1.1.1",
"release_status": "public-release",
"resource_type": "dataset",
"total_cases": 1500,
"geometries": [
"floorfrontdriver",
"floorfrontR",
"trunkfloor"
],
"cases_per_geometry": 500,
"states_per_case": 17,
"split": {
"seed": 12345,
"train": 400,
"validation": 50,
"test": 50,
"note": "same case-ID lists, independent simulations per geometry"
},
"fields": {
"inputs": [
"fixed finite-element mesh",
"impact_xyz",
"velocity_xyz",
"mass_ratio",
"material_young_mpa",
"material_poisson"
],
"outputs": [
"17-state nodal 3D displacement",
"17-state shell von Mises effective stress, maximized over through-thickness integration points"
]
},
"units": {
"status": "SPECIFIED",
"system": "tonne-mm-s-N",
"coordinate": "mm",
"displacement": "mm",
"time": "s",
"velocity": "mm/s",
"effective_stress": "MPa",
"young_modulus": "MPa",
"impactor_mass": "tonne",
"impactor_density": "tonne/mm^3",
"mass_ratio": "dimensionless",
"theta_phi": "degree"
},
"license": "MIT",
"doi": null,
"creators": [
"Anonymous Authors"
],
"source_model": {
"name": "2020 Nissan Rogue finite-element model",
"developer": "CCSA, George Mason University",
"sponsor": "NHTSA",
"exact_version": "Version 3, released August 2024",
"official_page": "https://www.ccsa.gmu.edu/models/2020-nissan-rogue/"
},
"geometry_metadata": {
"floorfrontdriver": "floorfrontdriver_geometry.json",
"floorfrontR": "floorfrontR_geometry.json",
"trunkfloor": "trunkfloor_geometry.json"
},
"simulation": {
"solver": "LS-DYNA SMP single precision R12 via ANSYS v221 lsdyna_sp.exe",
"exact_r12_subbuild_retained_for_every_case": false,
"ncpu": 8,
"memory": "400m",
"termination_time_s": 0.03,
"d3plot_nominal_interval_s": 0.0002,
"gravity_global_z_mm_per_s2": 9810.0,
"boundary_condition": "topological outer-boundary nodes fixed in all six degrees of freedom",
"contact": "CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_ID",
"static_friction": 0.15,
"dynamic_friction": 0.15
},
"impactor": {
"type": "rigid spherical shell",
"part_id": 9636,
"section_id": 9636,
"material_id": 174,
"material_model": "MAT_RIGID",
"radius_mm": 12.5,
"initial_gap_mm": 5.0,
"elform": 2,
"shrf": 0.833333,
"nip": 3,
"shell_thickness_mm": 0.1,
"reference_nominal_mass_tonne": 0.01,
"reference_density_tonne_per_mm3": 5.205e-05,
"mass_scaling": "impactor_mass = reference_nominal_mass_tonne * mass_ratio",
"density_scaling": "impactor_density = reference_density_tonne_per_mm3 * mass_ratio"
},
"design": {
"method": "seven-dimensional constrained Latin hypercube with maximin selection over 128 trials",
"dimensions": ["position_x", "position_y", "impact_speed", "mass_ratio", "theta", "phi", "material_class"],
"impact_speed_mm_per_s": [1732.05, 5196.15],
"mass_ratio": [0.75, 1.25],
"theta_deg": [0.0, 15.0],
"phi_deg": [0.0, 360.0],
"minimum_boundary_distance_mm": 80.0,
"seeds": {
"floorfrontR": 20260728,
"trunkfloor": 20260723,
"floorfrontdriver_initial": 20260721,
"floorfrontdriver_extensions": 20260722
}
},
"temporal_sampling": {
"raw_nominal_interval_s": 0.0002,
"compact_stride": 10,
"append_final_state": true,
"retained_indices": [0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 151],
"peak_time_definition": "discrete argmax of valid-node displacement magnitude over retained states"
}
}
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