| --- |
| pretty_name: Isaac Material Property Seed Dataset |
| license: other |
| task_categories: |
| - other |
| tags: |
| - materials-science |
| - robotics |
| - isaac-sim |
| - physics-simulation |
| - pbr |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: data/train.jsonl |
| --- |
| |
| # Isaac Material Property Seed Dataset |
|
|
| A lightweight material-property catalogue intended to support material |
| retrieval and automatic material assignment in NVIDIA Isaac Sim and related USD |
| simulation workflows. |
|
|
| The initial release contains 150 major material subgroups. |
|
|
| ## Schema |
|
|
| Identity fields: |
|
|
| - `material_description` |
| - `material_class` |
| - `material_family` |
|
|
| Physical parameters: |
|
|
| - `rho`: density, canonical unit `kg/m^3` |
| - `E`: Young's modulus, canonical unit `Pa` |
| - `nu`: Poisson's ratio, dimensionless |
| - `mu_s`: static-friction coefficient, dimensionless |
| - `mu_d`: dynamic-friction coefficient, dimensionless |
| - `e`: coefficient of restitution, dimensionless |
| - `G`: shear modulus, canonical unit `Pa` |
| - `K`: bulk modulus, canonical unit `Pa` |
|
|
| Each physical parameter has exactly three fields: |
|
|
| - `<parameter>_value`: nullable floating-point value in the canonical unit |
| - `<parameter>_source`: nullable URL, citation, or stable source identifier |
| - `<parameter>_dt_obtained`: nullable ISO 8601 timestamp recording when the value was obtained |
|
|
| `schema.json` is the machine-readable schema and unit contract. `data/train.jsonl` |
| is the canonical Hub data file; `data/train.csv` is included for convenient manual |
| editing and spreadsheet workflows. |
|
|
| ## Curation rules |
|
|
| 1. Never populate a numeric value without its source and acquisition timestamp. |
| 2. Convert all values into canonical units before storage. |
| 3. We prefer representative subgroup values or midpoints over false grade-level precision. |
| 4. Preserve ranges and test conditions in the source record during later enrichment. |
| 5. Treat friction and restitution as simulation priors unless their counterface and |
| measurement conditions are known. |
| 6. Values derived from other fields must identify the derivation in the source field. |
|
|
| Useful isotropic derivations, when `E` and `nu` are grounded, are: |
|
|
| ```text |
| G = E / (2 * (1 + nu)) |
| K = E / (3 * (1 - 2 * nu)) |
| ``` |
|
|
|
|
|
|
