A Material Library is supported with DFMD files. These files are located in the Program Files\ANSYS Inc\V251\ANSYS\bin\\Motion\Material Library\Structural\ folder. The DFMD file supports material properties such as Material Name, Density, Young's Modulus, and XY-Poisson's Ratio as shown in the figure below.
The DFMD file contains four properties - Name,
            Density, YoungsModulus, and
            PoissonsRatio and their corresponding values. When the Motion
            Preprocessor is started, the preprocessor loads the DFMD files and
            their properties into the program. If a DFMD file is added to or
            removed from the folder, the material name and its properties from the file appear or
            disappear in the Material Library
            dialog.
