Specifying volumetric test data

You can use the Test Data Editor to specify the normalized bulk creep compliance or relaxation modulus as a function of time. For information on using volumetric test data to define viscoelastic material behavior, see Time domain viscoelasticity, or Frequency domain viscoelasticity.

  1. Create a viscoelastic material model as described in Defining time domain viscoelasticity” or Defining frequency domain viscoelasticity.”

  2. From the Test Data menu in the Edit Material dialog box, select Volumetric Test Data.

    A Test Data Editor appears.

  3. In the Long-term normalized volumetric compliance or modulus field, enter either the long-term, normalized volumetric compliance, jK⁢(∞), for creep test data or the long-term, normalized volumetric modulus, kR⁢(∞), for relaxation test data.

  4. In the Data table, enter the following data:

    jK or kR

    The normalized volumetric compliance, jK(t),(jK(t)≥1), for creep test data or the normalized volumetric modulus, kR(t),(0≤kR(t)≤1), for relaxation test data.

    Time

    Time, t. (t>0)

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

  5. Click OK to return to the Edit Material dialog box.