Description: Abaqus/CAE now includes a third material calibration behavior, Hyperelasticity with permanent set, that enables you to derive material behaviors for hyperelasticity, plasticity, and Mullins effect from uniaxial and biaxial test data. When you select the data sets from which you want to derive these material behaviors, Abaqus/CAE extracts each loading, unloading, and reloading component of the data as well as the permanent set data and creates new calibration data sets for each cycle. This process enables you to use a subset of these test data for the derivation of material behaviors.

Figure 6–1 shows the extracted data sets in the Edit Behavior dialog box with the first and fifth unloading and reloading cycles toggled off. Data from these deselected cycles will not be included in the calculations of material behaviors; and they are also excluded from the X–Y curves displayed in the viewport, as shown in Figure 6–2.

After you extract the individual data sets, you can select the yield point on the primary curve from the viewport. If desired, you can also edit the data in the primary curve if you want to smooth its profile.

Hyperelasticity with permanent set calibration behaviors can be based on a single set of test data (either uniaxial or biaxial) or based on a data set of each type. By default, Abaqus/CAE applies equal weight to both data sets if you choose both uniaxial and biaxial test data; however, you can adjust the definition if you want one of the data sets to factor more heavily into calculations of the plasticity material behavior and, to a lesser extent, calculations of Mullins effect.

Model Tree:
    Create Calibration: Behaviors container: Hyperelasticity with permanent set