Vertical penetration (Cone Penetration Test) - input_data.json¶
The complete input_data.json for Tutorial 3. Every key is described on the input_data.json file format page.
The run folder also needs the cone geometry CPT.stl and its mesh cache CPT_mesh.txt, from the top level of the AMPSSIE repository.
{
"GPU" : "on",
"domain": {
"size": 10.0,
"gravity": [0.0, 0.0, -9.81]
},
"material points": {
"extra capacity": 1.2,
"element size": 2.0,
"number of material points per element 1": 2,
"material size": { "min": [0.0, 0.0], "max": [10.0, 10.0] },
"layers": [
{
"thickness": 20.0,
"material": { "type": "willam warnke",
"E": 2.28e7, "nu": 0.25,
"friction angle": 32.75, "dilation angle": 2.75, "cohesion": 300.0,
"density": 1652.0,
"E overburden": { "reference stress": 2.1785e5, "exponent": 0.58125 } }
}
]
},
"rigid bodies": [
{
"offset": [-0.01, -0.01, 0.0],
"points": [
{ "position": [0.0, 0.0, 0.0], "mass": 39989.6, "rotational inertia": [1626001.9, 1626001.9, 3199.2],
"boundary conditions": ["fixed", "fixed", "fixed", "fixed", "fixed", "fixed"] }
],
"stl files": [
{ "name": "cpt", "stl": "CPT.stl",
"mesh cache": "CPT_mesh.txt", "point": 1 }
]
}
],
"contact": {
"friction coefficient": 0.33
},
"analysis": [
{
"type": "static",
"load steps": 5,
"load": "gravity ramp",
"rigid bodies": "off",
"adaptivity": { "type": "uniform" },
"boundary conditions": { "min": ["roller", "roller", "fixed"], "max": ["roller", "roller", "fixed"] }
},
{
"type": "static",
"load steps": 450,
"load": "full",
"rigid bodies": "on",
"rigid body surface placement": "on",
"adaptivity": {
"type": "rigid body surface",
"element size": 0.025
},
"rigid body boundary conditions": [
{ "system": 1, "point": 1, "boundary conditions": ["fixed", "fixed", { "prescribed": -0.01 }, "fixed", "fixed", "fixed"] }
],
"boundary conditions": { "min": ["roller", "roller", "fixed"], "max": ["roller", "roller", "fixed"] }
}
],
"solver": {
"tolerance": 1.0e-6,
"max newton iterations": 20,
"poor factor": 0.25,
"ghost factor": 0.025,
"ghost factor mass": 0.25
},
"output": {
"vtk": "on",
"vtk directory": "vtk_CPT_dr38",
"vtk percent": 0.5,
"vtk material point fields": ["displacement", "velocity", "stress", "strain", "volume"],
"vtk rigid body fields": ["position", "velocity", "reaction force"],
"csv": "on",
"csv directory": "csv_CPT_dr38",
"csv percent": 0.25,
"csv material point fields": ["initial position", "position", "stress"],
"csv rigid body fields": ["position", "velocity", "reaction force", "reaction moment"]
}
}