{
  "E_MPa": 115100.0,
  "nu": 0.28,
  "density_tonne_mm3": 4.43e-09,
  "plastic_true_stress_vs_equivalent_plastic_strain": [
    [
      781.6,
      0.0
    ],
    [
      888.021113223284,
      0.00010917814710578993
    ],
    [
      934.7927919200695,
      0.0018691890578575489
    ],
    [
      958.2434,
      0.00951460622563769
    ]
  ],
  "source_url": "https://ntrs.nasa.gov/api/citations/20160008952/downloads/20160008952.pdf",
  "source_sha256": "e63a98da22dce5946bf50a4997b2377aadd5cc49983706292985c3f2086586de",
  "source_pages": {
    "PDF_page": 35,
    "printed_page": 31,
    "table": "II",
    "material_pedigree_PDF_page": 7
  },
  "temperature_C": 20,
  "source_strain_rate_s_1": 0.001,
  "source_engineering_points": [
    {
      "stress_MPa": 881.1,
      "total_engineering_strain": 0.007855082536924414,
      "offset": 0.0002
    },
    {
      "stress_MPa": 925.5,
      "total_engineering_strain": 0.010040834057341443,
      "offset": 0.002
    },
    {
      "stress_MPa": 941.3,
      "total_engineering_strain": 0.018,
      "offset": null
    }
  ],
  "visually_reviewed": true,
  "plastic_strain_data_limit": 0.00951460622563769,
  "approximation": "Piecewise isotropic rate-independent J2 summary-point approximation, not a digitized full curve or certified rod material. PL781.6MPa used as approximate initial yield; TableII combines different tests. Source plate is textured/orthotropic; isotropic reduction is declared.",
  "inherited_assumptions": "nu=.28 and density4430kg/m3 retained assumptions; neither inferred from TableII.",
  "limitations": "20C quasistatic reference only; no validated high-rate, temperature, cyclic Bauschinger, damage/fracture/fatigue behavior. Beyond last tabulated plastic strain is unsupported and flagged, never accepted silently."
}