Defining cast iron plasticity

The cast iron plasticity model describes the mechanical behavior of gray cast iron, a material whose microstructure consisting of graphite flakes in a steel matrix. The model definition includes the plastic Poisson's ratio and information on hardening under compression and tension. See Cast Iron Plasticity, for more information.

  1. From the menu bar in the Edit Material dialog box, select MechanicalPlasticityCast Iron Plasticity.

    (For information on displaying the Edit Material dialog box, see Creating or editing a material.)

  2. Display the Plasticity tabbed page, and do the following:
    1. Toggle on Use temperature-dependent data to define data that depend on temperature.

      A column labeled Temp appears in the Data table.

    2. Click the arrows to the right of the Number of field variables field to increase or decrease the number of field variables on which the data depend.
    3. Enter the following data in the Data table:

      Plastic Poisson's Ratio

      Value of the plastic “Poisson's ratio,” νp⁢l, where -1.0<νp⁢l≤0.5. (Dimensionless.) The default value is 0.04.

      Temp

      Temperature, θ.

      Field n

      Predefined field variables.

      For detailed information on how to enter data, see Entering tabular data.

  3. Display the Compression Hardening tabbed page, and do the following:
    1. Toggle on Use temperature-dependent data to define data that depend on temperature.

      A column labeled Temp appears in the Data table.

    2. Click the arrows to the right of the Number of field variables field to increase or decrease the number of field variables on which the data depend.
    3. Enter the following data in the Data table:

      Sigmac

      Yield stress in compression, σc.

      Epsilonc

      Absolute value of the corresponding plastic strain. (The first tabular value entered must always be zero.)

      Temp

      Temperature.

      Field n

      Predefined field variables.

      You may need to expand the dialog box to see all the columns in the Data table. For detailed information on how to enter data, see Entering tabular data.

  4. Display the Tension Hardening tabbed page, and do the following:
    1. Toggle on Use temperature-dependent data to define data that depend on temperature.

      A column labeled Temp appears in the Data table.

    2. Click the arrows to the right of the Number of field variables field to increase or decrease the number of field variables on which the data depend.
    3. Enter the following data in the Data table:

      Sigmat

      Yield stress in uniaxial tension, σt.

      Epsilont

      Corresponding plastic strain. (The first tabular value entered must always be zero.)

      Temp

      Temperature.

      Field n

      Predefined field variables.

      You may need to expand the dialog box to see all the columns in the Data table. For detailed information on how to enter data, see Entering tabular data.

  5. Click OK to create the material and to close the Edit Material dialog box. Alternatively, you can select another material behavior to define from the menus in the Edit Material dialog box (see Browsing and modifying material behaviors, for more information).