Define the Material Model

Define an elastic-plastic material model with isotropic elasticity and Johnson-Cook plasticity.

There are two distinct computational modes available for defining a material's response curve: analytical mode and numerical mode. Analytical mode is faster, but it supports calibration for fewer material models and is subject to other limitations. Numerical mode is slower, but it provides support for more material models, including the elastic-plastic models used for this example. Therefore, you define the material model for A356 aluminum using the numerical mode.

  1. From the top of the Calibration Setup panel, click Material Model .
  2. Name the material model Elastic-Plastic.
  3. Click Expand all.
  4. From the execution model list, select Numerical Mode .
    The dialog box updates the list to display the material models that you can define in numerical mode.
  5. Click to expand the tree of supported material behaviors, and select Elastic-Plastic.
  6. Click OK.
    The app adds parameters for isotropic elasticity and isotropic Johnson-Cook plasticity to the Material model section of the Calibration Setup panel. For each parameter, the app provides an initial value.

    The app also computes the initial responses based on these parameters and plots a response curve on the same plot as the test data. The response curve is red, the same color as the plot of the test data points.