Displaying X–Y plots of hyperfoam material behavior

Abaqus/CAE allows you to evaluate hyperfoam material behavior by automatically creating response curves. When the curve fitting is complete, Abaqus/CAE opens the Visualization module and displays X–Y plots of the test results and a dialog box containing the stability limits for each strain energy potential. You can review the results and adjust the material as necessary. For more information, see Evaluating hyperelastic, hyperfoam and viscoelastic material behavior.

See Also
In Other Guides
Hyperelastic Behavior in Elastomeric Foams
  1. From the main menu bar, select MaterialEvaluatematerial name. The material that you select must include hyperfoam material data.

    Tip: You can also select the name of the material in the Material Manager and then click Evaluate.

    An Evaluate Material dialog box appears.

  2. If you selected a hyperfoam material that also includes viscoelastic or hyperelastic material data, toggle on Perform hyperfoam evaluation if it is not already selected.

    If desired, you can also evaluate the viscoelastic behavior of the material. For more information, see Displaying X–Y plots of viscoelastic material behavior.

  3. In the Available Input Data field, do the following:
    1. Select the Source option of your choice:

      • Select Test data if you want Abaqus to calculate the necessary coefficients from the experimental data specified in the material definition.

      • Select Coefficients if you want Abaqus to use the coefficients specified in the material definition.

    2. If you selected Test data in the previous step, specify the test data type or types that you want Abaqus to use in calculating the coefficients. (Only data types for which you have specified data in the material definition appear in the list.)
  4. From the list of Standard Tests, select one or more tests for which you want response calculations using the data in the material definition.
  5. For each test that you select, enter a minimum and maximum strain value that will be the upper and lower limits for the stress-strain response curves.
  6. If the material that you are evaluating also includes viscoelastic material properties, click the Viscoelastic tab; you can either toggle off Perform viscoelastic evaluation, or select viscoelastic evaluation options. For more information, see Displaying X–Y plots of viscoelastic material behavior.
  7. Click OK to begin the response calculations.

    If the evaluation fails during the extraction of material coefficients due to problems with nonlinear curve-fitting, Abaqus/CAE displays a dialog box containing the name of the data (.dat) file; the path to the data file is printed in the message area. The data file provides detailed information on each problem encountered. (For more information on the data file, see About Output.)

    If Abaqus completes the tests successfully, Abaqus/CAE enters the Visualization module and displays X–Y plots of the test results in new viewports. (For information on X–Y plots, see X–Y plotting.) The data objects appear in the X–Y Data Manager; you can copy them to an output database or perform any of the tasks that you can perform on other X–Y data in the Visualization module.

    In addition, Abaqus/CAE displays an informational dialog box containing the stability limits and coefficients. The dialog box also displays the viscoelastic material parameters if a viscoelastic evaluation was performed. Abaqus/CAE displays in the message area the path to the data (.dat) file that contains all the material evaluation information.

  8. If desired, return to the Property module to edit the material data or to evaluate other materials.