Continuum Damage Mechanics: Test Data

Attached to this post is a zip file containing synthetic test data for a martensitic steel.  The basis of this test data is this paper from Dr. Aditya Deole:

The numerical prediction of ductile fracture of martensitic steel in roll forming  (2018)

Dr. Deole was kind enough to share his test data with me and I used it to create a set of synthetic test data from six different specimens.   Why create synthetic test data ?

1)  In order to have test data from a broader range of deformations (specimen geometries).

2)  In order to have high quality, consistent data, without testing errors.

3)  So that there is a known material model answer.

4)  Perhaps to hide some of the detail of the actual test data. 

So, first I worked with the actual test data and created a full elastic-plastic + damage material model.  Then using this known material model, I ran six different FE models to generate the synthetic data. These models were run in the fall of 2021 using Abaqus 2021. Abaqus Viewer was used to extract force and displacement histories of the load point.  

Note on the elastic-plastic model:  when fitting the full hardening curve, many papers on CDM (Continuum Damage Mechanics) prefer to use an equational form, rather than tabular form.  One particular equational form that is often quoted is the mixed Swift-Voce equation.  That form is implemented in the 3DX calibration app, though it is then output for use in the Abaqus solvers as a tabular set of points.  The original stipulation of the Swift-Voce equation used to calibrate the Deole test data is shown in the figure below.  The choice of 50 tabular points was later reduced to 25 points by a hand editing of the points in the .inp file.   

 

In the zip file attached, there is a separate Excel file for each specimen. There is also a summary Excel file containing the cleaned/decimated synthetic data for all specimens.  As an example, the uniaxial specimen model is also included.
 

 

 

References:  Continuum Damage Mechanics: References

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