In the first two parts of this tutorial series I discussed the available experimental data and how to import it into MCalibration. In this part I will show how to select a material model and how to setup things up to start the material parameter calibration.
There are three ways to specify a material model in MCalibration. The following sections demonstrate the methods.
Material Model Selection – Method 1
The easiest way to specify a material model is to use the material model wizard. First click the magic wand button:
This opens a material specification dialog:
In this dialog you need to specify what the material type, the target FE solver, and if you want to use a material model that is native to that FE solver or a PolyUMod material model (which will work with all FE solvers).
Material Model Selection – Method 2
Another method to select a material model is to press the
Set Material Model button. This will open a dialog box that can be used to specify any supported material model.
Material Model Selection – Method 3
The last method to specify a material model is to copy it from another open MCalibration window. Once the material model has been copied, it can then be pasted into the original MCalibration window.
Suitable Material Models
As was shown in Part 1 of this tutorial series, PEEK is stiff thermoplastic material which undergoes isotropic viscoplastic flow if exposed to large enough strains. For this type of material there are multiple candidate material models that can be tested. Here are some of the top candidates:
- PolyUMod Three Network (TN) model
- PolyUMod Three Network Viscoplastic (TNV) model
- Elastic-plastic with rate dependence
- Abaqus Parallel Rheological Framework (PRF) model
These models are examined in the next part of the tutorial series.