24.6.4 Creating field output by operating on fields

You can create field output by computing new results using the field output available in the output database. For example, you might create new field output variables to show the differences in the stress fields between two increments. For detailed examples, see Building valid field output expressions, Section 24.6.1.

You create new field output variables from fields by operating on analysis results found in the output database. You can display field output variables that you have created in the same ways as output database field output variables: in the form of a deformed, contour, or symbol plot; by probing any model or X–Y plot; as X–Y data obtained along a path through your model; or in a tabular report. Field output variables that you have created are saved in the session step until you end the session or close the output database from which the field output originates.

Note:  Field output created using complex results will contain only the real portion of the data. You cannot create field output that includes the imaginary part of complex results.

To create field output by operating on existing fields:

  1. Locate the options for creating field output from fields.

    From the main menu bar, select ToolsCreate Field OutputFrom Fields.

    The Create Field Output dialog box appears.

    Tip:  You can also specify field output by using the tool in the toolbox.

  2. The default name for the new field output variable appears in the Name text field. To provide a more meaningful name, replace this default with the name of your choice (including blank spaces if you wish).

  3. Build your expression in the expression text field using a combination of the following procedures:

    1. Select a function from the menu on the right side of the Create Field Output dialog box.

      • Select Operators to apply a built-in arithmetic operator to the selected field output.

      • Select Transformation to apply a coordinate system transformation to the selected field output.

      • Select Scalar to extract a scalar component from the selected field output.

      The list below the menu changes to reflect your selection.

    2. Select field output variables from the list on the left side of the Create Field Output dialog box. You can select field output for any step and frame in the analysis.

      Tip:  Place your cursor over the vertical lines separating each column in the output variable table, and enlarge the column widths to see the complete text.

      The field output variable appears in the expression text field.

    3. Select operators, transformations, or scalars from the list on the right side of the Create Field Output dialog box.

      The selected function appears in the expression text field.

      Note:  If you select a dynamic coordinate system (a system that follows nodes in your model) from the list of transformations, deformationField= appears in the expression text field inside the transform function. You must select a deformation field output variable that ABAQUS/CAE will use to compute the position of the coordinate system.

    4. Use standard mouse and keyboard editing techniques in the expression text field to position the cursor and configure your expression.

    5. Adjust the syntax of your expression if necessary: parentheses may be needed.

    6. If you make a mistake and wish to start over, click Clear Expression.

    For more information, see Building valid field output expressions, Section 24.6.1.

  4. Click OK to create your new field output variable and to dismiss the dialog box.

    ABAQUS creates a new field output variable that is contained in a frame of the session step and available from the Field Output dialog box. Current results plots, if any, are not affected.


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