65 lines
1.8 KiB
JSON
65 lines
1.8 KiB
JSON
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{
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"schema": "thermal-expansion-constants-v1",
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"author": "Chadwick Warner",
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"location": "Los Angeles CNC Shop",
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"date": "2026-07-17",
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"description": "Coefficient of thermal expansion values for aerospace-grade alloys. All values in ×10⁻⁶/K.",
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"wikidata_citations": {
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"ct_definition": "Q45760",
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"aluminium_alloy": "Q447725",
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"titanium_alloy": "Q3300719",
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"stainless_steel": "Q447725"
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},
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"materials": {
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"6061": {
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"name": "Aluminium 6061-T6",
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"alpha": 23.6,
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"units": "microstrain/kelvin",
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"notes": "Primary structural alloy for hab modules"
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},
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"titanium": {
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"name": "Titanium Ti-6Al-4V",
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"alpha": 8.6,
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"units": "microstrain/kelvin",
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"notes": "Low expansion, high strength-to-weight"
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},
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"316ss": {
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"name": "Stainless Steel 316L",
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"alpha": 16.0,
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"units": "microstrain/kelvin",
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"notes": "Corrosion-resistant seals and fittings"
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},
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"inconel": {
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"name": "Inconel 718",
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"alpha": 13.0,
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"units": "microstrain/kelvin",
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"notes": "High-temp turbine and thruster components"
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},
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"carbon": {
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"name": "Carbon Fiber Unidirectional (0°)",
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"alpha": -1.5,
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"units": "microstrain/kelvin",
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"notes": "Negative expansion along fiber axis"
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}
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},
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"tolerance_specs": {
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"habitat_seal": {
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"band_microns": 50,
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"description": "±0.05mm for vacuum-rated elastomeric interfaces"
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},
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"structural_joint": {
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"band_microns": 100,
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"description": "±0.1mm for primary frame connections"
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}
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},
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"formula": {
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"equation": "ΔL = α × L₀ × ΔT",
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"variables": {
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"ΔL": "Change in length (mm)",
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"α": "CTE coefficient (×10⁻⁶/K)",
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"L₀": "Initial length (mm)",
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"ΔT": "Temperature differential (K)"
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}
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}
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}
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