PolyUMod TN Model
This tutorial will demonstrate how to calibrate a temperature-dependent Three Network (TN) material model using MCalibration. The example will use experimental data for a PEEK material that was tested at 4 different temperatures. At each temperature, the material was tested in tension and compression at 2 different strain rates. That is a really nice dataset!
Step 1. Read in all experimental data into MCalibration
Also note that you can select what units MCalibration is using in the MCalibration Options dialog:
If you like you can also specify a target Poisson’s ratio using a “Poisson’s Ratio” load case. I will skip this step in this tutorial. After all load cases have been specified the main MCalibration window should look something like the following:
Step 2. Select the PolyUMod TN model in the Material Model dialog box
Then click “OK” to select the TN model. Note that the model parameters “thetaHat”, “n”, and “theta0” specify the temperature dependence of the material model. The TN model is unusual in that it uses an equation-based approach to the temperature dependence. A detailed description of the equations are given on this page.