{
  "TopologyOptimizationExample": "beam","//": "user defined project name",
  "material": {
    "E": 2.1e11,
    "poisson_ratio": 0.3,
    "thermal_conductivity":43, "//unit": "W/(m*K)",
    "thermal_expansion_coefficient": 1.21e-5, "//unit": "1/K"
  },
  "topology": {
    "max_loop":20,
    "volfrac": 0.5,
    "penal": 3.0, "//": "1-6, only work for Mechanical Top Opt, the higher the value, the density tends to be 0/1",
    "r_min": 1.2,
    "T_ref": 312,
    "T_limit": 3996.52,
    "R_E": 28,
    "R_lambda": 28,
    "R_beta":0
  },
  "model": {
    "regular_model": {
      "lx": 1,
      "ly": 30,
      "lz": 10
    }
  },
  "mechanical_boundary_condition":{
    "DBC": [
      {
        "min": [0, 0, 0],
        "max": [1, 0, 1],
        "dir": [1, 1, 1]
      }

    ],
    "NBC": [
      {
        "min": [0, 1, 0],
        "max": [1, 1, 0],
        "val": [0.0,0.0 , -1e8]
      }

    ]
  },
  "thermal_boundary_condition": {
    "NBC": [
      {
        "min": [0.5, 0.2, 0.2],
        "max": [0.5, 0.2, 0.2],
        "heat_flux": 3.5, "//unit": "W"
      },
      {
        "min": [0.5, 0.8, 0.2],
        "max": [0.5, 0.8, 0.2],
        "heat_flux": 3.5, "//unit": "W"
      }

    ],
    "DBC": [
      {
        "min": [0, 0, 1],
        "max": [1, 0.5, 1],
        "temperature": 312, "//unit": "K"
      }
    ]
  }
}