Here is an example of how to create a materials file, explained step by step:

  • Create and edit the file (problem_type_name.mat in this example) inside the problem_type_name directory (where all your problem type files are located). As you can see, except for the extension, the names of the file and the directory are the same.
  • Create the first material, which starts with the line:
  • MATERIAL: Air

    The parameter is the name of the material. A unique material name is required for this into this materials file (do not use blank spaces in the name of the material).

  • The next two lines define a property of the material and its default value:
  • QUESTION: Density

    VALUE: 1.0

    You can add as many properties as you wish. To end the material definition, add the following line:

    END MATERIAL

  • In this example we have introduced some materials; the .mat file would be as follows:
  • MATERIAL: Air

    QUESTION: Density

    VALUE: 1.01

    END MATERIAL

    MATERIAL: AISI_4340_Steel

    QUESTION: YOUNG_(Ex)

    VALUE: 21E+9

    QUESTION: SHEAR_MODUL

    VALUE: 8.07E+9

    QUESTION: POISSON_(NUXY)

    VALUE: 0.3

    QUESTION: ALPX

    VALUE: 0.0000066

    QUESTION: DENSITY_(DENS)

    VALUE: 0.785

    END MATERIAL

    MATERIAL: Concrete

    QUESTION: Density

    VALUE: 2350

    END MATERIAL

  • The materials defined in the .mat file can be managed in the Materials window (found in the Data menu) in the Preprocessing component of GiD.