Macro material properties for 3D physics simulation

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+*.safetensors filter=lfs diff=lfs merge=lfs -text
+saved_model/**/* filter=lfs diff=lfs merge=lfs -text
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+*tfevents* filter=lfs diff=lfs merge=lfs -text
+# Audio files - uncompressed
+*.pcm filter=lfs diff=lfs merge=lfs -text
+*.sam filter=lfs diff=lfs merge=lfs -text
+*.raw filter=lfs diff=lfs merge=lfs -text
+# Audio files - compressed
+*.aac filter=lfs diff=lfs merge=lfs -text
+*.flac filter=lfs diff=lfs merge=lfs -text
+*.mp3 filter=lfs diff=lfs merge=lfs -text
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+*.wav filter=lfs diff=lfs merge=lfs -text
+# Image files - uncompressed
+*.bmp filter=lfs diff=lfs merge=lfs -text
+*.gif filter=lfs diff=lfs merge=lfs -text
+*.png filter=lfs diff=lfs merge=lfs -text
+*.tiff filter=lfs diff=lfs merge=lfs -text
+# Image files - compressed
+*.jpg filter=lfs diff=lfs merge=lfs -text
+*.jpeg filter=lfs diff=lfs merge=lfs -text
+*.webp filter=lfs diff=lfs merge=lfs -text
+# Video files - compressed
+*.mp4 filter=lfs diff=lfs merge=lfs -text
+*.webm filter=lfs diff=lfs merge=lfs -text
+partnext_material_rho_E_nu_CC-BY-4.0.csv filter=lfs diff=lfs merge=lfs -text

LIMITATIONS.md

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+# Known limitations, with measured magnitudes
+
+Every figure below was measured from data inside this table, not asserted.
+
+## 1. Anisotropy is collapsed to isotropy — 19,299 rows
+
+Wood and fibre-reinforced laminates are orthotropic. This table stores one E (the
+longitudinal / fibre-direction modulus) and one ν, so an isotropic solver will get the
+**deformation shape** wrong even when the magnitude is right.
+
+The table contains 287 rows whose shear modulus is source-reported, which lets the
+isotropic identity G = E/(2(1+ν)) be checked directly:
+
+| material group | n | closure vs measured G |
+|---|---|---|
+| isotropic classes (metals, ceramics, glass, rock) | 273 | **0.24 % median error** — identity holds |
+| wood (Populus tremula veneer, oak consensus) | 2 | over-predicts **3.3–5.2×** |
+| fibre laminates (carbon / aramid / basalt / glass) | 7 | over-predicts **3.8–8.9×** |
+| paper, machine direction | 13 | over-predicts 1.4–1.6× |
+
+The isotropic control group at 0.24 % shows the method is sound; the error is entirely
+the anisotropy collapse. Transverse stiffness of wood and laminates is therefore too
+high by roughly 3–9×. For rigid-body contact this is irrelevant; for FEM/MPM
+deformation it is the dominant error.
+
+Particulate composites (24 glass-sphere/epoxy rows) are genuinely isotropic and carry
+no such caveat.
+
+## 2. E on wood is a density regression — 19,033 rows
+
+Only 1.4 % of wood rows have a species-measured E. The rest are computed from density
+by the USDA Wood Handbook specific-gravity regression.
+
+- **13,265 rows (ρ ≥ 500) carry a calibrated regression value** (×1.226). The factor comes from
+  `fill_log.csv`, which retains both the round-1 regression value and the round-5
+  USDA measured MOE for the same cell. Leave-one-out validation, n = 10:
+  median bias **−18.4 % → +0.0 %**, share of \|error\| > 20 % **30 % → 0 %**.
+- **5,768 rows (ρ < 500) carry the uncalibrated regression** — the required factor
+  scatters 0.50–1.29 there, so no single factor is supportable. Residual bias ≈ −18 %.
+- **672 rows are flagged for a low-density over-prediction**: below ρ ≈ 400 the power law
+  over-predicts; measured over-estimate on 5 reference species is **+54 % median**
+  (worst: *Ceiba pentandra*, measured 2.8 GPa vs regression 5.56 GPa, +99 %).
+
+The residual disagreements are structural rather than calibration error: the
+exponent 0.72 compresses the dense end, and the 17 calibration species are all
+tropical imports from USDA Table 5-5a, so temperate softwoods remain slightly low.
+
+## 3. Moisture basis — all wood is on a 12 % MC basis
+
+GWDD v.2 is an ecology database: it stores **basic density** (oven-dry mass / green volume)
+and the matched USDA values are **green** MOE. CIRAD stores 12 %-MC density and 12 %-MC
+MOE. Those two conventions are not comparable, and a species present in both databases
+would otherwise appear twice on different scales.
+
+The 18,046 GWDD rows are therefore expressed at 12 % MC: ρ × **1.213**, E × **1.179**. Both factors
+were measured inside the table — 793 species present in both databases give the density
+ratio, 11 species with USDA measured MOE in both give the modulus ratio (e.g.
+*Ceiba pentandra* 2.8 / 3.7, *Terminalia superba* 5.3 / 7.0). Prior-knowledge pass rate
+on 68 reference species rose from 78 % to 94 %.
+
+The original basic density is recoverable by dividing by 1.213, and is in the source
+file `gwdd_v2.2.csv`. Three species are absent from this table because their converted
+density would exceed the density of wood cell-wall substance (~1500 kg m⁻³) — two of them
+are palms, which are not true wood.
+
+## 4. ν is a group median on 19,138 rows
+
+Wood ν comes from USDA Wood Handbook Table 5-2 softwood/hardwood group medians
+(0.341 / 0.3665). The 156 species-level values in this table span **0.229–0.495**
+(σ = 0.051), so a single species can be off by ±38 %.
+
+This cannot currently be improved: ν shows no exploitable density trend
+(r = +0.202 against log ρ), so the group median is the best available estimate.
+
+A further **1,144 rows** carry a ν whose upstream reference literally reads
+*"this dataset (self-referential prior)"* — agreement with other rows of the same class
+is therefore **not** independent validation.
+
+## 5. Values whose citation does not report them — 636 rows
+
+On these rows the cited paper does **not** report the quantity; an alloy-family ASM
+value was substituted upstream after the original was judged corrupt (e.g. AZ40 raw
+325.8 GPa, Hastelloy X raw 5.07 GPa). They are labelled `family_standard`, never
+`source`. Within-family spread of measured values is ±4–6 % for aluminium, stainless,
+carbon steel and titanium, and ±32 % for magnesium.
+
+## 6. Volumetric locking — 48 rows
+
+38 elastomer rows at ν = 0.49 and 10 wood rows at ν = 0.485–0.495 would lock linear
+tetrahedra and cause pressure oscillation in MLS-MPM. `poissons_ratio_fem_safe` clamps
+them to 0.45.
+The cost is real: K/G falls from 49.7 at ν = 0.49 to 9.7 at ν = 0.45. With mixed /
+F-bar elements or a near-incompressible constitutive model, use the original column.
+
+## 7. Unit-of-measurement caveats on individual rows
+
+- `Twaron aramid yarn [fibre-direction, …]` (2 rows): ρ = 1440 is **fibre** density and
+  E is the fibre-direction modulus — not fabric-scale values. Renamed to make this explicit.
+- `Epoxy|Polyester / …wt% phosphate glass fibre` (4 rows): the wt % in the grade name is
+  inconsistent with the reported density (which implies v_f ≈ 0.29–0.48, not 0.07–0.13).
+  ρ and E are mutually consistent and inside Voigt–Reuss bounds; do not use the wt % as
+  a fibre fraction.
+- `quartzite`: 23 GPa is a jointed **rock-mass** deformation modulus; intact quartzite is
+  70–90 GPa.
+- `POM` (openpoly): 7.36 GPa is a literature mean that mixes glass-filled and neat grades;
+  a neat-resin row (2.075 GPa, takayama2024) is also present.
+
+## 8. Coverage gaps
+
+- 848 source-reported cells (3.8 %) across ~50 small sources have not been round-tripped
+  to an original file — mostly single PMC papers contributing 2–96 cells each.
+- The `textile_woven` moduli derived from the Sperl et al. SIGGRAPH 2022 dataset were
+  computed from the published force–elongation curves rather than taken as published
+  scalars.
+- Wood ν for 19,138 rows and the anisotropy of all wood rows would both be resolved by
+  USDA Wood Handbook Table 5-1 (E_R/E_L, E_T/E_L, G_LR); that table is not yet ingested.

README.md

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+---
+license:
+  - cc-by-4.0
+  - cc-by-sa-4.0
+  - odbl
+license_details: >-
+  Three shards under three incompatible licences; see the licence table below.
+  Load one config at a time.
+language:
+  - en
+tags:
+  - materials-science
+  - physics-simulation
+  - finite-element
+  - mpm
+  - wood
+  - mechanical-properties
+  - 3d-assets
+pretty_name: Macro Material Properties for 3D Physics Simulation
+size_categories:
+  - 10K<n<100K
+configs:
+  - config_name: permissive
+    default: true
+    data_files: partnext_material_rho_E_nu_CC-BY-4.0.csv
+  - config_name: share_alike
+    data_files: partnext_material_rho_E_nu_CC-BY-SA-4.0.csv
+  - config_name: odbl
+    data_files: partnext_material_rho_E_nu_ODbL.csv
+---
+
+# Macro Material Properties for 3D Physics Simulation
+### Grade-level rho / E / nu priors with per-quantity provenance
+
+**21,160 rows — 20,315 distinct material grades across 15 macro material classes** —
+each carrying **density ρ, Young's modulus E and Poisson's ratio ν**, assembled from
+56 public sources for annotating 3D assets and driving rigid-body and deformable
+physics simulation (Genesis, Isaac Gym, FEM, MPM).
+
+The distinguishing feature of this table is not its size. It is that **every single
+value states what it actually is** — measured, derived, or filled — and where it is not
+a direct measurement, **the error has been quantified against data inside the table
+itself**, not asserted.
+
+All fields, including the per-row `citation_gap_note`, are in English.
+
+Read `LIMITATIONS.md` before using this for deformable simulation.
+
+---
+
+## 1 · Veracity — what is actually measured
+
+| | ρ | E | ν |
+|---|---|---|---|
+| **reported by the cited source, a handbook, or a grade standard** | **20,329 (96.1 %)** | 1,912 (9.0 %) | 732 (3.5 %) |
+| derived from this row's density | – | 19,033 (89.9 %) | – |
+| handbook softwood/hardwood group median | – | – | 19,138 (90.4 %) |
+| alloy-family / class prior / solver clamp / computed | 831 | 215 | 1,290 |
+
+Only **514 rows (2.4 %)** have all three quantities stated directly by a source.
+
+**ρ is the only quantity measured at scale.** E and ν are estimates on ~90 % of rows.
+This is a property of the upstream sources — the Global Wood Density Database, which
+supplies 85 % of the rows, publishes density only. What this table adds is that each
+estimate is labelled for what it is and its error is measured.
+
+The `value_provenance` column states the origin of each quantity separately, e.g.
+`rho=source;E=derived_from_rho;nu=handbook_group`. The `citation_gap_note` column then
+says, for each non-source value, exactly where it came from and what its measured error
+is. **636 rows carry a value that the cited paper does not report at all** — an
+alloy-family standard substituted upstream after the original was judged corrupt. Those
+are labelled `family_standard`, never `source`, and say so in the note.
+
+## 2 · Plausibility — how it was checked
+
+Four independent checks, none of which relies on assertion:
+
+**Internal consistency of wood (19,294 rows).** Longitudinal sound speed √(E/ρ) has
+median **4,296 m s⁻¹**, P1 4,056, P99 4,727. This is the known species-invariant value
+for wood, so E and ρ are mutually consistent row by row — a check that needs no external
+reference at all.
+
+**Isotropic elasticity closure (287 rows with a source-reported shear modulus).**
+G = E/(2(1+ν)) holds to a **median 0.24 %** on the 273 rows in isotropic classes. The same
+identity over-predicts by 3.3–8.9× on wood and fibre laminates — which is how the anisotropy
+caveat in `LIMITATIONS.md` is quantified rather than guessed. (The few outliers inside the
+isotropic set are themselves anisotropic materials, e.g. foliated gneiss.)
+
+**Prior-knowledge spot check.** 101 checks over 68 well-characterised timber species
+spanning temperate/tropical, softwood/hardwood and the full density range:
+**ρ 96/101, E 95/101** inside published ranges.
+
+**Numerical conditions, every row.** 0 rows with ν ∉ [0, 0.5), non-positive bulk or
+shear modulus, or out-of-range wave speed.
+
+Two calibration steps sit behind the wood values, both with factors derived from data
+inside the table and both validated: the density regression is calibrated against USDA
+measured MOE (leave-one-out median bias +0.0 %), and all wood is expressed on a single
+12 % moisture basis. `LIMITATIONS.md` §2–3 gives the factors and their derivation.
+
+## 3 · Traceability — every value has a recorded origin
+
+- **96.2 % of source-reported cells were round-tripped**: recomputed from the original
+  upstream data file and matched. GWDD 18,046/18,046 recomputed from 109,626 raw
+  measurement records under the documented aggregation rule; CIRAD 1,010/1,010;
+  SciGlass 890/890; USDA 444/444; Materials Project 342/342; StressEng 677/677.
+- **Every filled cell traces to an upstream `fill_log` entry** — 40,936 cells, 0 unmatched.
+  Where a value differs from the raw log entry it is because one of the two calibration
+  steps in `LIMITATIONS.md` §2–3 applies, and the row says so.
+  The log records the route and the reference for each fill (e.g. `C_SG_REGRESSION` →
+  USDA Wood Handbook FPL-GTR-190 Ch. 5).
+- **Grade names**: 84.0 % verified against a formal designation system — 17,597 botanical
+  binomials resolved to `accepted` in World Flora Online, plus CHEMICAL_FORMULA, AA, AISI/SAE
+  and steel grade codes. The remaining 16 % are trade or descriptive names with no standard
+  designation. Only 2 non-grade-level rows survive in the published shards (both named
+  `[proxy]`); the other 23 class-level envelopes were withheld.
+- The remaining 848 source cells (3.8 %) come from ~50 small sources, mostly single
+  open-access papers contributing 2–96 cells each, cited but not independently re-derived.
+
+## 4 · Physics simulation — what you can run
+
+**Rigid body (Genesis, Isaac Gym): ρ and E are ready, friction is not in this table.**
+ρ is measured on 96 % of rows and is what sets mass and inertia; E only enters contact
+stiffness, where order-of-magnitude accuracy suffices. A rigid-body material in Genesis or
+Isaac also needs static and dynamic friction and a restitution coefficient, and **this
+release carries none of them** — supply them from your own contact model. Restitution in
+particular is a contact-pair property, not a material constant, and no source here reports it.
+
+**Deformable (FEM / MPM): no row diverges, and the caveats are per-row.**
+
+| tier | rows | share | meaning |
+|---|---|---|---|
+| **F1** direct | 653 | 3.1 % | no caveat |
+| **F2a** clamp ν | 38 | 0.2 % | ν > 0.45 would lock linear tetrahedra — use `poissons_ratio_fem_safe`. 48 rows carry a clamped value in total; the other 10 are wood and appear under F2b |
+| **F2b** anisotropy collapsed | 18,627 | 88.0 % | magnitude usable, **deformation shape wrong**: transverse stiffness too high by 3–9× |
+| **F2c** ν is a proxy | 1,168 | 5.5 % | numerically fine, directionality lost |
+| **F3** E error known large | 672 | 3.2 % | low-density wood, E over-predicted 30–100 % |
+| **F4** blocked | **2** | 0.01 % | an 8 kPa hydrogel and a 2.5 kPa knit sag > 20 % under self-weight at 0.2 m — real behaviour, not a data error |
+
+By class: metals, ceramics, glass, stone, plastics, foam, paper and engineered wood are
+F1/F2c throughout. Wood is F2b because of the isotropic collapse. Elastomers need the
+clamp column.
+
+`poissons_ratio_fem_safe` = min(ν, 0.45) is a **solver parameter, not a material property**.
+The cost of clamping is real — K/G falls from 49.7 at ν = 0.49 to 9.7 at ν = 0.45 — so with
+mixed / F-bar elements or a near-incompressible constitutive model, use `poissons_ratio`.
+
+**Linear-elastic validity windows** (beyond these, a linear model is the wrong physics
+regardless of parameter accuracy): wood ≈ 0.3–0.5 % strain, laminates ≈ 0.5–1 %, foams
+≈ 2 %, fabrics 1–5 % (the window the moduli were fitted in), elastomers require a
+hyperelastic model above ~10–20 %.
+
+---
+
+## Three license shards
+
+CC BY-SA and ODbL are both share-alike and **cannot be merged into one derived dataset**,
+so the table ships as three. The permissive shard alone covers all 15 classes.
+
+| config | rows | licence | contents |
+|---|---|---|---|
+| `permissive` (default) | 19,715 | CC BY 4.0 | CC0 / CC BY / MIT / US-Gov public domain. All 15 classes. |
+| `share_alike` | 1,021 | CC BY-SA 4.0 | CIRAD tropical timber + Wikidata cross-checks |
+| `odbl` | 424 | ODC-ODbL | SciGlass optical and technical glasses |
+
+33 further rows are withheld — 12 Ashby teaching-licence class envelopes, 10 internal
+consensus rows, 10 rows whose recorded licence string ("open research dataset") is not a
+licence identifier, and one manufacturer datasheet. No real material is lost, but note the side effect:
+those rows were the class-level fallbacks, so a part identified only as "wood" has no
+single row to fall back on and must be matched against 19,294 species. `class_defaults.csv`
+is provided for that case: a per-class median computed from the permissive shard itself.
+
+## Columns
+
+| column | meaning |
+|---|---|
+| `material_class` | one of 15 macro classes |
+| `material_grade` | grade / species / designation — unique together with `source_id` |
+| `density_kg_m3` | ρ, kg·m⁻³ |
+| `youngs_modulus_GPa` | E, GPa |
+| `poissons_ratio` | ν as reported or filled |
+| `poissons_ratio_fem_safe` | min(ν, 0.45) — solver parameter, not a material property |
+| `value_provenance` | `rho=…;E=…;nu=…`, per-quantity origin |
+| `citation_gap_note` | for every non-source value: real origin and measured error |
+| `source_id`, `source_citation`, `source_doi_or_url`, `source_license`, `redistribution_clearance` | provenance and licensing |
+
+`class_defaults.csv` is a separate 15-row helper for retrieval: per macro class, the median
+ρ / E / ν over the permissive shard with a p10–p90 band, a row count, and a
+`fallback_reliability` flag. Use it only when a part's class is known but no grade can be
+matched — the band shows what falling back costs. Three classes are flagged: `glass`
+(only 3 rows are permissive, 424 are in the `odbl` shard), `textile_woven` (mixes
+fabric-scale and fibre-direction rows five orders of magnitude apart, so its median is
+meaningless) and `wood_solid` (the isotropic-collapse caveat applies to every row).
+
+`value_provenance` vocabulary: `source` · `handbook` / `handbook_group` ·
+`named_standard` · `family_standard` (**cited paper does not report this quantity**) ·
+`derived_from_rho` · `class_prior` / `class_prior_self` · `sim_clamp` · `computed`.
+
+## Citation
+
+Cite the sources listed in each row's `source_citation`. The largest contributors are:
+
+- **Fischer, F.J., Chave, J., Zanne, A.E. et al. (2026).** Global Wood Density Database v.2
+  (GWDD v.2), v2.2, Zenodo, [10.5281/zenodo.20815517](https://doi.org/10.5281/zenodo.20815517)
+  — CC BY 4.0. Accompanying article: Fischer et al. (2026), *Beyond species means — the
+  intraspecific contribution to global wood density variation*, New Phytologist,
+  [10.1111/nph.70860](https://doi.org/10.1111/nph.70860). Supplies 18,046 rows.
+  The source file was identified by checksum: the copy used here
+  (`gwdd_v2.2.csv`, 73,386,310 bytes, md5 `646454bd0ebcecb201fe081d0efde8fe`) is
+  byte-identical to the file of that name in Zenodo record 20815517.
+- **CIRAD wood density database** (Vieilledent et al.), CC BY-SA 4.0 — 1,010 rows.
+- **USDA FPL Wood Handbook FPL-GTR-190**, US Government work — 262 rows.
+- **StressEng** (Kumar, Kabra & Cole 2024, *Scientific Data* 11:1273), CC BY 4.0 — 749 rows.
+- **SciGlass** (EPAM Systems), ODC-ODbL — 424 rows.
+- **Materials Project** (Jain et al. 2013), CC BY 4.0 — 114 rows.
+- **MIL-HDBK-5J** (2003) and **Smith (1976)** *J. Res. NBS* 80A(1), 45–49, US Government works.

class_defaults.csv

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+material_class,n_rows,density_kg_m3_median,density_kg_m3_p10,density_kg_m3_p90,youngs_modulus_GPa_median,youngs_modulus_GPa_p10,youngs_modulus_GPa_p90,poissons_ratio_median,poissons_ratio_fem_safe_median,n_rows_with_source_reported_density,sound_speed_m_s_median,fallback_reliability,note
+wood_solid,18284,715.7,479.1,958.3,13.7414,8.4725,16.9555,0.3665,0.3665,18284,4296.0,usable,"Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched. Dominated by Global Wood Density Database v.2 (Fischer et al. 2026, CC BY 4.0); E is a calibrated density regression on almost every row and the isotropic collapse applies."
+metal_nonferrous,530,2840.0,1800.0,8600.0,72.0,44.8,149.748,0.33,0.33,76,4984.0,usable,Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+metal_ferrous,345,7850.0,7800.0,7850.0,202.9,185.0,210.0,0.29,0.29,22,5084.0,usable,Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+ceramic,134,5816.9,3225.0,9680.0,192.141,89.13095,429.1568,0.2835,0.2835,133,5608.0,usable,Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+plastic_thermoplastic,72,1140.0,922.0,1398.0,1.74145,0.4442,3.0,0.37,0.37,72,1239.0,usable,Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+stone_mineral,62,2644.2,2266.0,3060.7,32.83,10.157,95.86517,0.246,0.246,62,3569.0,usable,Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+plastic_thermoset,56,1200.0,1170.5,1420.0,2.895,1.29075,4.35,0.35,0.35,56,1561.0,moderate (n<60),Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+elastomer_rubber,44,1000.0,970.0,1100.0,0.002051,9.3e-05,0.01835,0.49,0.45,44,45.0,moderate (n<60),Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched. Median nu is 0.49; use poissons_ratio_fem_safe_median (0.45) with linear tetrahedra.
+wood_engineered,43,670.0,502.0,805.3,4.41,3.0,7.554,0.3665,0.3665,43,2613.0,moderate (n<60),Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+textile_woven,35,317.9,221.9,407.0,0.000123,3.8e-05,0.000292,0.37,0.37,34,20.0,moderate (n<60),"Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched. Mixes fabric-scale and fibre-direction rows, which differ by 5 orders of magnitude in E. The median is not meaningful; pick a row, not this default."
+composite,33,1458.2,1233.0,1786.7,5.08,3.126,11.982,0.366,0.366,8,1801.0,moderate (n<60),Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+leather,30,860.0,860.0,860.0,0.02255,0.00955,0.05733,0.3,0.3,29,159.0,moderate (n<60),Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+foam_polymer,23,79.4,17.9,178.1,0.005838,0.002521,0.02657,0.2,0.2,23,379.0,moderate (n<60),Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+paper_cellulose,21,689.7,547.6,875.0,2.149,1.33998,5.234,0.2413,0.2413,2,1830.0,moderate (n<60),Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched.
+glass,3,2230.0,2206.0,2446.0,72.0,72.0,72.0,0.228,0.228,3,5682.0,low (n<10),Class-level fallback for a part whose class is known but whose grade is not. Median over the permissive shard of this release; the p10-p90 band shows how much is lost by falling back. Not a material: prefer a grade-level row when one can be matched. WEAK FALLBACK: only 3 glass rows sit in the permissive shard; the other 424 are in the odbl shard. Load the odbl config for a representative glass value.

partnext_material_rho_E_nu_CC-BY-4.0.csv

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:af9f908a9215d0e88492ba1ab750142760c15c241da2c920a0d8fff49a46d2f9
+size 59140673