[
  {
    "name": "mat_1",
    "model": "sd1",
    "isotropy": 1,
    "density": 1550.0,
    "temperature": 0,
    "elastic": {
      "e1": 140000000000.0,
      "e2": 9000000000.0,
      "e3": 9000000000.0,
      "g12": 4500000000.0,
      "g13": 4500000000.0,
      "g23": 3200000000.0,
      "nu12": 0.28,
      "nu13": 0.28,
      "nu23": 0.33
    },
    "label": "1"
  }
]