You can derive a usable constitutive model by calibrating an
optimal set of material parameters. Optimal parameters for a material provide minimal error
between the measured response of the real material and the computed response from the
numerical simulation.
Material Calibration is a native
app that lets
you do the following:
- Import test data (the files containing the experimental results to which you want to
calibrate material behavior).
- Process imported test data to reduce noise, decimate large data sets, shift the origin
of the test data, and remove outlier points.
- Define range response data to extrapolate the material response beyond the regions of
your curve for which test data exists.
- Select the material model that specifies the type of response curve that you want to
calibrate. For example, you can select hyperelasticity with rate dependency as the model,
then specify the hyperelasticity type to determine the material parameters to which you
want to calibrate. The app includes
built-in simulation models that are easy to use and cover the most common types of
material testing procedures: uniaxial, biaxial, planar, volumetric, and simple shear.
- Perform a finite element model-based calibration, in which you can import a finite
element model to calibrate a material response. This process lets you calibrate materials
using simulation models of arbitrary complexity that include general states of
nonhomogeneous deformation. For example, FEM-based calibration can help you calibrate the
material response for a uniaxial tension test that includes necking and failure.
- Plot the experimental test data and computed stress responses in an X-Y plot. Reviewing
the curves in a plot enables you to see how closely the computed response tracks the test
data sets.
- Run the calibration to minimize the deviation between the test data and the response
curve. You might want to repeat this process and adjust the parameters between
cycles.
- Export calibrated data to create a new material model that is available for use in your
simulations.
For information about accessing Material Calibration, see Opening an App from the Compass.