ABAQUS/CAE User's Manual


12.10.2 Defining electrical properties

You can use the Edit Material dialog box to define the following electrical material properties:

Defining electrical conductivity

If you are using a material in a coupled thermal-electrical analysis, you must define the material's electrical conductivity. You can specify electrical conductivity that is isotropic, orthotropic, or fully anisotropic. See the following sections for more information:

To define electrical conductivity:

  1. From the menu bar in the Edit Material dialog box, select OtherElectrical Electrical Conductivity.

    (For information on displaying the Edit Material dialog box, see “Creating or editing a material,” Section 12.6.1.)

  2. Click the arrow to the right of the Type field, and specify the directional dependence of the electrical conductivity.

  3. Toggle on Use temperature-dependent data to define electrical conductivity as a function of temperature.

    A column labeled Temp appears in the Data table.

  4. Click the arrows to the right of the Number of field variables field to increase or decrease the number of field variables on which electrical conductivity depends.

  5. Enter the applicable data in the Data table:

    Conductivity

    Isotropic electrical conductivity. (Units of CT–1L–1–1 .)

    s11(E), s22(E), and s33(E)

    Three values for orthotropic electrical conductivity, , , and . (Units of CT–1L–1–1.)

    s11(E), s12(E), s22(E), s13(E), s23(E), and s33(E)

    Six values for anisotropic electrical conductivity, , , , , , and . (Units of CT–1L–1–1.)

    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,” Section 3.2.7.

  6. Click OK 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,” Section 12.6.2, for more information).

Defining dielectric material properties

The Edit Material dialog box allows you to define the dielectric properties of a fully constrained material for use in a coupled piezoelectric analysis. For more information, see “Piezoelectric behavior,” Section 20.6.2 of the ABAQUS Analysis User's Manual.

To define dielectric properties:

  1. From the menu bar in the Edit Material dialog box, select OtherElectrical Dielectric.

    (For information on displaying the Edit Material dialog box, see “Creating or editing a material,” Section 12.6.1.)

  2. Click the arrow to the right of the Type field, and specify the directional dependence of the dielectric constant.

  3. Toggle on Use temperature-dependent data to define the dielectric constant as a function of temperature.

    A column labeled Temp appears in the Data table.

  4. 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 dielectric constant depends.

  5. Enter the applicable data in the Data table:

    Dielectric constant

    Dielectric constant for isotropic behavior. (Units of C–1L–1.) (For isotropic behavior.)

    D11, D22, and D33

    Three values to define orthotropic behavior, , , and . (Units of C–1L–1.)

    D11, D12, D22, D13, D23, D33

    Six values to define anisotropic behavior, , , , , , . (Units of C–1L–1.)

    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,” Section 3.2.7.

  6. Click OK 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,” Section 12.6.2, for more information).

Defining piezoelectric properties

You can define piezoelectric material properties by providing the stress coefficients, , or the strain coefficients, . For more information, see “Piezoelectric behavior,” Section 20.6.2 of the ABAQUS Analysis User's Manual.

To define piezoelectric properties:

  1. From the menu bar in the Edit Material dialog box, select OtherElectrical Piezoelectric.

    (For information on displaying the Edit Material dialog box, see “Creating or editing a material,” Section 12.6.1.)

  2. Toggle on Use temperature-dependent data to define piezoelectric properties as a function of temperature.

    A column labeled Temp appears in the Data table.

  3. 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 piezoelectric properties depend.

  4. In the Data table, enter the piezoelectric stress or strain coefficient matrix. For more information, see “Specifying piezoelectric material properties” in “Piezoelectric behavior,” Section 20.6.2 of the ABAQUS Analysis User's Manual. Enter values for temperature and field variables if applicable.

    For detailed information on how to enter data, see “Entering tabular data,” Section 3.2.7.

  5. Click OK 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,” Section 12.6.2, for more information).