The image above is from a worked example showing a new feature called "Calibration Cases". 

For the R2023x FD01 release of the material calibration app (Feb, 2023), we have added a new capability to compare two or more material model calibrations.  This new feature was motivated by customers' requests for the ability to compare two different material models, as shown here: Compare two or more material model calibrations

This new feature was implemented in a more general way.  When used in the FE mode of calibration, this feature can be used to compare two (or more) FE model responses.  I was performing some calibrations of an adhesive layer.  In order to double check some modeling constructs I decided to make two FE models:

1) Use COH2D4 elements and *Elastic, type=Traction to model the adhesive layer.

2) Use CPE4I elements and *Elastic to model the adhesive layer.

I had seen some slightly nonlinear behavior from model #1 and wanted to double check the source of the non-linearity.

Another way this new feature could be used:  Import two different FE models, one coarsely meshed and one finely meshed.  Use the fast-running coarse mesh to do the majority of your calibration activity and then use the fine mesh to do only a validation last step (or a follow-on small amount of calibration).

In the narrated video below, we follow these steps to prepare our calibration:

1.  Import test data, just one set of test data will be used.
   
2.  Import both FE models.
   
3.  Rename the 1st case as COH
   
4.  Create the second case, name it CPE
   
5.  Switch back to first case.  Create an output request on the model you need (cohesive model).
   
6.  Create the material model  ;  Elastic, Type=Traction
   
7.  Evaluate. 
   
8.  Switch to second case.
   
9.  Create an output request with the model you need (plain strain, CPE4I).
   
10. Create the material model  ;  simple isotropic Elastic
    
11. Evaluate
    
12. Create Results Comparison Plot
    
13. Add damage to the Traction-Separation material model.
    

This video was created on Dec 5, 2022 using a development version of the calibration app that looks like R2023x FD01 to be released on the public cloud on Feb 11, 2023.

This zip file contains 8 files. It should allow you to recreate everything shown in the video.

Back to:   Calibration App New Features in R2023x FD01

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Back to:  Material Modeling and Calibration - An Overview and Curriculum