This post serves as a list of all the new features in the 3DExperience Material Calibration App for R2026x FD01. My intention is to create separate posts for each new feature to explain and demonstrate. This will serve as a set of examples that users can refer to and follow.
R2026x FD01 was pushed to the public cloud on Saturday, Feb 7, 2026.
This post is a work in progress. As the demonstration posts are created (over the next few days), hyperlinks will be added here.
Add new Paperboard material model
26x FD01 Calibration : New Paperboard model added
Add Cast Iron plasticity material model
26x FD01 Calibration : Cast Iron material model added
Add Hencky to all hyperelastic areas :
26x FD01 Calibration : Hencky hyperelasticity added
Add Mullins Effect, Definition=Slow Decay
26x FD01 Calibration : Payne Effect, Mullins Slows Decay
Add volumetric test data basis for Marlow and VL in Numeric & FE Modes
26X FD01 Calibration : Volumetric basis for Marlow and Valanis-Landel models
Master curve for stress relaxation / creep test data
26x FD01 Calibration : Stress Relaxation Master Curve
26x FD01 Calibration : Creep Master Curve
Add a general "bias" capability for spacing in test data processing :
26x FD01 Calibration : New spacing option for Test Data Editing
Add "Truncate at Peak" feature to test data processing
26x FD01 Calibration : Truncate Test Data
Add units to column header when exporting test data
Related to thermoplastics:
Add Darveaux and Modified Darveaux creep laws to PRF :
26x FD01 Calibration : Added Darveaux creep law to PRF model
Support for PRF_TNM material model calibration:
Jorgen Bergström's Three Network Model (TNM aka TN model)
Addition of solution dependent variables and user custom schema as a first class material option, available for all user subroutines.
These 3 items are now available across all user-subroutines:
- Solution Dependent variables (state variables) available for all user-subroutines
- Custom Schemas can now be used for all
- *User Defined Field, Type=Specified 26x FD01 Calibration : *User Defined Field, Type=Specified
Export unit-cubes from Analytical or Numerical mode. 26x FD01 Calibration : Export Unit-Cube new feature
Addition of “Formulation” option to user-defined hyperelasticity.
Formulation = Invariant ➡️ Abaqus UHYPER user-subroutine
Formulation = Stretch ➡️ Abaqus UHYPER_STRETCH user-subroutine
See this post on the SIMULIA Community for a demonstration of both UHYPER and UHYPER_STRETCH.
Comparing Neo-Hookean and Ogden N=1 hyperelastic models
Unfortunately, as of today (2-2-2026) it looks like the two below are broken. Fixes will have to go into FD02.
26x FD02 : Calibration of UANISOHYPER_STRAIN user-subroutine
26x FD02 : Calibration of UANISOHYPER_INV usersub
