93 lines
2.4 KiB
JSON
93 lines
2.4 KiB
JSON
|
{
|
||
|
|
"metadata": {
|
||
|
|
"version": "1.0",
|
||
|
|
"author": "Avery Sherman",
|
||
|
|
"location": "Mount Joy, PA",
|
||
|
|
"date": "2026-07-17",
|
||
|
|
"purpose": "Agent-legible thermal expansion coefficient database and failure threshold lookup",
|
||
|
|
"citation": "NIST Materials Property Data Repository, Wikidata Q193870",
|
||
|
|
"homepage": "https://avery-sherman.4ort.net/"
|
||
|
|
},
|
||
|
|
"materials": [
|
||
|
|
{
|
||
|
|
"id": "steel",
|
||
|
|
"name": "Carbon Steel",
|
||
|
|
"alpha": 12e-6,
|
||
|
|
"units": "/K",
|
||
|
|
"notes": "Standard structural steel, ASTM A36 equivalent"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"id": "aluminum",
|
||
|
|
"name": "Aluminum 6061-T6",
|
||
|
|
"alpha": 23.2e-6,
|
||
|
|
"units": "/K",
|
||
|
|
"notes": "Most common aerospace-grade aluminum alloy"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"id": "glass",
|
||
|
|
"name": "Borosilicate Glass",
|
||
|
|
"alpha": 3.3e-6,
|
||
|
|
"units": "/K",
|
||
|
|
"notes": "Pyrex-type low-expansion glass"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"id": "concrete",
|
||
|
|
"name": "Reinforced Concrete",
|
||
|
|
"alpha": 14.5e-6,
|
||
|
|
"units": "/K",
|
||
|
|
"notes": "Typical Portland cement composite"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"id": "titanium",
|
||
|
|
"name": "Titanium Ti-6Al-4V",
|
||
|
|
"alpha": 8.6e-6,
|
||
|
|
"units": "/K",
|
||
|
|
"notes": "Grade 5 titanium, aerospace standard"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"id": "copper",
|
||
|
|
"name": "Oxygen-Free Copper",
|
||
|
|
"alpha": 16.5e-6,
|
||
|
|
"units": "/K",
|
||
|
|
"notes": "High-purity copper for thermal applications"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"id": "invar",
|
||
|
|
"name": "Invar 36",
|
||
|
|
"alpha": 1.2e-6,
|
||
|
|
"units": "/K",
|
||
|
|
"notes": "Fe-Ni alloy, near-zero expansion"
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"failure_thresholds": {
|
||
|
|
"acceptable": {
|
||
|
|
"max_mismatch_mm": 1.0,
|
||
|
|
"description": "No special accommodation required"
|
||
|
|
},
|
||
|
|
"requires_buffer": {
|
||
|
|
"min_mismatch_mm": 1.0,
|
||
|
|
"max_mismatch_mm": 10.0,
|
||
|
|
"description": "Sliding bearing or thermal buffer zone mandatory"
|
||
|
|
},
|
||
|
|
"critical": {
|
||
|
|
"min_mismatch_mm": 10.0,
|
||
|
|
"description": "Rigid joint will catastrophically fail"
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"worked_examples": [
|
||
|
|
{
|
||
|
|
"scenario": "Mars Habitat Dome Truss",
|
||
|
|
"primary_material": "aluminum",
|
||
|
|
"secondary_material": "steel",
|
||
|
|
"L0_meters": 2.5,
|
||
|
|
"deltaT_celsius": 350,
|
||
|
|
"calculated_mismatch_mm": 9.8,
|
||
|
|
"required_gap_mm": 11.27,
|
||
|
|
"outcome": "Requires sliding bearing interface"
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"field_protocol_version": "1.0",
|
||
|
|
"safety_factor_standard": 1.5,
|
||
|
|
"gap_tolerance_multiplier": 1.15
|
||
|
|
}
|