{
  "schema": "project33.c8.hinge_fos/1",
  "generator": "structures/fea_lite.py",
  "units": {
    "stress": "MPa",
    "force": "N",
    "length": "mm"
  },
  "inputs": {
    "pin_material": "Ti-6Al-4V",
    "yield_strength_MPa": 880.0,
    "pin_diameter_mm": 2.0,
    "fin_mass_kg": 0.154,
    "axial_load_g": 50.0,
    "hinge_gap_mm": 19.4
  },
  "load_case": "double shear with central point-load bending, M = F L / 4",
  "bending_stress_MPa": 466.46,
  "shear_stress_MPa": 12.02,
  "von_mises_stress_MPa": 466.92,
  "factor_of_safety": 1.8847,
  "reference_values": {
    "aluminum_6061_T6_modulus_GPa": 69.0,
    "note": "handbook comparison value used by the historical C8 note"
  },
  "basis": "closed-form calculation; no load test or material coupon was measured"
}