Traditionally in Abaqus most of the user subroutines support the idea of putting information on the data lines and this information is passed to the user subroutine.  For material model related user subroutines this information is typically material model parameters. An example from 2019 of using the Calibration App for a UMAT calibration in this traditional way is shown in this post:

UMAT calibration using the new 3DX calibration app

As newer user subroutines became more complex and supported much more information to be passed into the user subroutine, a new mechanism was developed to pass this information into the user subroutine.  This is done by *Parameter Table and *Property Table. 

The video below was created using version 2025x HotFix 1.19 (March 26, 2025).  It demonstrates how a Custom Schema is used to augment the 3D Experience Calibration App user interface, and how a Parameter Table is used inside a UMAT to access the material parameters. 

The zip file below contains all the files needed for you to perform this calibration as a worked example. The file named umat_usub.dll was created using Abaqus 2025.  This dll file works with 3DX R2025 HotFix 1.18.  Older or newer version of the calibration app may not work with this dll file.  

In a week or two I will add another video that shows doing this same workflow in FE mode. 

Back to:  User Subroutine Calibration

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