Product: Abaqus/CAE
Benefits: To define more realistic material models, you can now specify that the first or the last cycles of the unloading and reloading curves be used to derive the Mullins effect material behavior from uniaxial and biaxial test data: previously, there was no option for this selection and only the last cycles were extracted. In addition, you now can specify the strain or stress value for the yield point and the other value is calculated automatically from the primary curve, which makes the data entry clearer.
Description: When you calibrate data for hyperelasticity with permanent set, you can now select the cycle from which to extract data to calibrate the Mullins effect. By default, the last unloading and reloading curves are extracted from each strain level in the supplied uniaxial and/or biaxial test data. Alternatively, you can specify that the first unloading and reloading curves be used to calibrate the Mullins effect.
The Edit Behavior dialog box for hyperelasticity with permanent set has been revised to rename the Primary Curve options to the Yield Point options with fields for Strain and Stress. You enter either the strain or stress value, and Abaqus/CAE calculates the other value from the primary curve and populates the remaining field.
Model Tree: Create Calibration: Behaviors container: Hyperelasticity with permanent set: Extract Mullins from: Last cycle found or First cycle found Yield Point: click, and enter Strain or Stress