MeshPy from DAT to YAML

[isteinbrecher]

with #320 MeshPy now can write native YAML files for 4C. This is the default option, dat file output is no longer possible. From the user side not much has changed actually, all the major interfaces are still the same and work as expected. The following examples show the main things that have to be adapted when upgrading to YAML input files:

Definition of simulation parameters (will likely improve, get additional functionality with the change to fourcipp)
old

    input_file.add(
        """
    -----------------------------------PROBLEM TYPE
    PROBLEMTYPE                           Structure
    RESTART                               0
    --------------------------------------IO
    OUTPUT_BIN                            No
    STRUCT_DISP                           No
    FILESTEPS                             1000
    VERBOSITY                             Standard
    """
    )

new

    input_file.add(
        {
            "PROBLEM TYPE": {
                "PROBLEMTYPE": "Structure",
            },
            "IO": {
                "OUTPUT_BIN": False,
                "STRUCT_DISP": False,
                "VERBOSITY": "Standard",
            },
        }
    )

Definition of boundary conditions
Note: the argument format_replacement is removed and one can now simply pass the functions as a list to the FUNCT key.
old

    input_file.add(
        BoundaryCondition(
            cantilever_set["end"],
            "NUMDOF 9 ONOFF 1 1 1 1 1 1 0 0 0 VAL 3. 3. 0 0 0 0 0 0 0 FUNCT {} {} 0 0 0 0 0 0 0",
            format_replacement=[cos, sin],
            bc_type=mpy.bc.dirichlet,
        )
    )

new

    input_file.add(
        BoundaryCondition(
            cantilever_set["end"],
            {
                "NUMDOF": 9,
                "ONOFF": [1, 1, 1, 1, 1, 1, 0, 0, 0],
                "VAL": [3.0, 3.0, 0, 0, 0, 0, 0, 0, 0],
                "FUNCT": [cos, sin, 0, 0, 0, 0, 0, 0, 0],
            },
            bc_type=mpy.bc.dirichlet,
        )
    )

Definition of functions
old

f1 = Function("SYMBOLIC_FUNCTION_OF_TIME t")
f2 = Function("COMPONENT 0 SYMBOLIC_FUNCTION_OF_SPACE_TIME t")

new

f1 = Function([{"SYMBOLIC_FUNCTION_OF_TIME": "t"}])
f2 = Function(
        [
            {
                "COMPONENT": 0,
                "SYMBOLIC_FUNCTION_OF_SPACE_TIME": "t",
            },
        ]
    )

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